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Bệnh Dupuytren

Dupuytren’s disease causes palm thickening and finger contracture—options range from observation to needle aponeurotomy or surgical excision.

Updated Aug 2026
Một minh họa vẽ tay của một bàn tay ngửa lòng bàn tay lên, với ngón tay giữa bị cong xuống và kéo vào lòng bàn tay do bệnh Dupuytren.
Bệnh Dupuytren: các dây chằng cứng ở lòng bàn tay kéo các ngón tay xuống. Kieran Hirpara 4.0

Trang này được dịch bằng máy và chưa được bác sĩ kiểm tra. Bản tiếng Anh là bản chính thức.

Những triệu chứng bạn có thể gặp

Bạn có thể nhận thấy sự dày lên hoặc cứng lại ở lòng bàn tay. Điều này là do bệnh Dupuytren, khiến mô dưới da trở nên co rút và nổi cục. Theo thời gian, mô này có thể hình thành các dây chằng kéo các ngón tay của bạn về phía lòng bàn tay. Bạn có thể thấy khó khăn khi đặt bàn tay phẳng trên mặt bàn hoặc đưa tay vào túi quần chật.

Khi tình trạng tiến triển, bạn có thể cảm thấy cảm giác kéo căng ở các ngón tay. Điều này thường bắt đầu với ngón áp út hoặc ngón út. Bạn có thể gặp khó khăn trong các hoạt động hàng ngày như bắt tay, rửa mặt hoặc cài áo. Việc với tay ra sau lưng để cài dây áo ngực hoặc cài cúc áo trở nên khó khăn hơn khi các ngón tay của bạn cong vào trong.

Đau không phải lúc nào cũng là triệu chứng chính, nhưng một số người có thể trải qua cảm giác khó chịu. Bạn có thể cảm thấy đau khi ấn vào các cục u ở lòng bàn tay. Cảm giác cứng khớp thường nặng hơn vào buổi sáng hoặc sau các khoảng thời gian bất hoạt. Thời tiết lạnh cũng có thể làm cho cảm giác kéo căng trở nên rõ rệt hơn.

Điều quan trọng cần biết là bệnh Dupuytren khá phổ biến. Nhiều người được chẩn đoán mắc bệnh này sẽ tìm kiếm điều trị vào một thời điểm nào đó. Mặc dù chưa có sự đồng thuận cao giữa các bác sĩ phẫu thuật về cách quản lý tốt nhất cho mọi trường hợp, nhưng phẫu thuật vẫn là phương pháp điều trị tiêu chuẩn vàng cho các co rút tiến triển. Điều này có nghĩa là đây là cách đáng tin cậy nhất để sửa chữa dị dạng và cải thiện chức năng bàn tay về lâu dài.

Nếu bạn đang gặp phải các triệu chứng này, bác sĩ phẫu thuật của bạn có thể đánh giá mức độ ảnh hưởng của bệnh đến bàn tay của bạn. Họ sẽ xem xét khả năng duỗi thẳng các ngón tay của bạn và mức độ hạn chế này ảnh hưởng đến cuộc sống hàng ngày của bạn. Việc nhận biết sớm giúp lập kế hoạch điều trị phù hợp cho bạn.

Những gì thực sự đang xảy ra

Bệnh Dupuytren là tình trạng mô dưới da lòng bàn tay dày lên và co rút. Mô này, được gọi là cân, đóng vai trò như một lớp hỗ trợ cho bàn tay của bạn. Theo thời gian, nó hình thành các dải hoặc dây chằng kéo các ngón tay của bạn về phía lòng bàn tay. Quá trình này thường liên quan đến chấn thương bàn tay trong quá khứ hoặc căng thẳng lặp đi lặp lại lên bàn tay.

Khi các dây chằng này co lại, chúng ảnh hưởng đến cơ chế duỗi—hệ thống giúp bạn duỗi thẳng các ngón tay. Kết quả là một biến dạng khiến một hoặc nhiều ngón tay bị kẹt ở tư thế cong. Bạn có thể thấy khó khăn khi đặt bàn tay phẳng trên mặt bàn hoặc thực hiện các nhiệm vụ hàng ngày như bắt tay hoặc đeo găng tay. Đây không chỉ là vấn đề về da; nó ảnh hưởng đến các cấu trúc sâu hơn kiểm soát chuyển động của bàn tay.

Bác sĩ phẫu thuật của bạn sẽ đánh giá mức độ co rút này ảnh hưởng đến các khớp cụ thể của bạn như thế nào. Mục tiêu của điều trị là giải phóng các dây chằng co rút này để khôi phục khả năng duỗi các ngón tay của bạn. Đối với nhiều bệnh nhân, việc sửa chữa phẫu thuật mang lại lợi ích chức năng đáng kể, cho phép bạn tái sử dụng bàn tay. Các thủ thuật như cắt cân giới hạn, liên quan đến việc loại bỏ mô co rút, được coi là tiêu chuẩn vàng cho các trường hợp tiến triển. Phương pháp này mang lại lợi ích lâu dài đáng kể về cả chức năng và kiểm soát bệnh.

Trong khi một số phương pháp điều trị nhằm phá vỡ các dây chằng, phẫu thuật vẫn là lựa chọn đáng tin cậy nhất cho kết quả lâu dài. Tuy nhiên, điều quan trọng là phải hiểu rằng nguy cơ biến chứng với các thủ thuật này là đáng kể. Bác sĩ phẫu thuật của bạn sẽ thảo luận xem một lựa chọn ít xâm lấn hơn, chẳng hạn như cắt cân bằng kim, có phù hợp với bạn hay không. Kỹ thuật này liên quan đến việc sử dụng một cây kim để phá vỡ mô co rút và có thể an toàn và đáng tin cậy, ngay cả trong các trường hợp tiến triển.

Cuối cùng, mục tiêu là cải thiện tính bình thường của bàn tay và chất lượng cuộc sống của bạn. Bằng cách sửa chữa biến dạng, bạn có thể giảm căng thẳng lên các gân gấp và khôi phục phạm vi chuyển động chức năng. Điều này giúp giải quyết các vấn đề về an toàn và xã hội thường đi kèm với rối loạn chức năng bàn tay. Bác sĩ phẫu thuật của bạn sẽ điều chỉnh phương pháp tiếp cận theo nhu cầu cụ thể của bạn, đảm bảo bạn đạt được kết quả tốt nhất có thể cho cuộc sống hàng ngày.

Những gì chúng tôi có thể làm về vấn đề này

Tiến sĩ Kieran Hirpara, một bác sĩ phẫu thuật chi trên tại Bệnh viện Tư nhân Mater Rockhampton, tiếp cận tình trạng này bằng cách điều trị phù hợp với mức độ tiến triển của bệnh. Bệnh nhân đến phòng khám của chúng tôi qua giới thiệu của bác sĩ đa khoa hoặc chuyên viên vật lý trị liệu. Đánh giá tại phòng khám, bao gồm khai thác tiền sử, khám lâm sàng và chụp chiếu khi cần thiết, giúp thiết lập chẩn đoán. Đối với các vấn đề kéo dài, chúng tôi thường thử điều trị không phẫu thuật trước tiên. Điều này bao gồm thay đổi hoạt động, vật lý trị liệu hoặc trị liệu tay, nẹp cố định và tiêm thuốc. Chúng tôi xem xét phẫu thuật khi những phương pháp này không mang lại sự cải thiện đủ mức.

Tự quản lý tập trung vào việc giữ cho các ngón tay của bạn luôn cử động. Kéo giãn nhẹ nhàng giúp duy trì độ linh hoạt và có thể làm chậm quá trình co thắt của các dây chằng ở lòng bàn tay. Vật lý trị liệu nhằm cải thiện tầm vận động và tăng cường các cơ hỗ trợ bàn tay của bạn. Bạn nên thử phương pháp này một cách nghiêm túc. Các bài tập đều đặn mỗi ngày là chìa khóa. Nếu bạn bị đau, thuốc giảm đau không kê đơn hoặc thuốc chống viêm có thể giúp bạn duy trì hoạt động. Những loại thuốc này không ngăn chặn bệnh tiến triển nhưng giúp các công việc hàng ngày trở nên dễ dàng hơn.

Khi điều trị bảo tồn đạt đến giới hạn, chúng tôi thảo luận về các lựa chọn y tế hoặc phẫu thuật. Các mũi tiêm, chẳng hạn như cortisone, có thể giảm viêm và đau tại các khu vực cụ thể. Hiệu quả chỉ tạm thời và không đảo ngược được tình trạng co rút. Đối với bệnh ở giai đoạn tiến triển, chúng tôi có thể cung cấp tiêm collagenase để phá vỡ các dây chằng co thắt, hoặc cắt cân qua da bằng kim để giải phóng chúng. Đây là các thủ thuật xâm lấn tối thiểu. Phẫu thuật vẫn là phương pháp điều trị tiêu chuẩn vàng cho các tình trạng co rút tiến triển. Cắt cân gan bàn tay giới hạn là lựa chọn phổ biến nhất. Thủ thuật này liên quan đến việc loại bỏ mô co thắt để làm thẳng các ngón tay của bạn. Cắt cân da có thể được sử dụng cho các trường hợp tiến triển để loại bỏ da và mô, mang lại lợi ích đáng kể về lâu dài cho chức năng và kiểm soát bệnh. Cắt cân qua da bằng kim an toàn và đáng tin cậy ngay cả ở giai đoạn tiến triển, với kết quả dự đoán được chấp nhận và nguy cơ biến chứng thấp. Cắt cân giới hạn hiện là phương pháp điều trị đáng tin cậy nhất cho kết quả lâu dài, mặc dù nguy cơ biến chứng là đáng kể. Chúng tôi trình bày những lựa chọn này để ra quyết định chung, để bằng chứng hướng dẫn sự lựa chọn của bạn.

Những điều cần biết

Bệnh Dupuytren là một tình trạng mạn tính, trong đó mô dày lên ở lòng bàn tay khiến các ngón tay bị co quắp vào trong. Bệnh thường tiến triển chậm trong nhiều năm. Nếu không được điều trị, tình trạng co rút thường tồn tại dai dẳng và có thể trở nên nghiêm trọng hơn, gây khó khăn cho việc đặt bàn tay phẳng trên mặt bàn hoặc đưa tay vào túi quần.

Phẫu thuật vẫn là phương pháp điều trị tiêu chuẩn cho các trường hợp tiến triển. Cắt cân gan bàn tay từng phần là lựa chọn phẫu thuật phổ biến nhất. Thủ thuật này loại bỏ mô dày lên để duỗi thẳng các ngón tay. Cắt cân da (dermofasciectomy), bao gồm việc loại bỏ da và mô, mang lại lợi ích lâu dài đáng kể cho bệnh ở giai đoạn nặng. Cả hai phương pháp đều nhằm cải thiện chức năng bàn tay và kiểm soát bệnh.

Quá trình hồi phục bao gồm một giai đoạn cứng khớp và sưng nề. Bạn có thể sẽ cảm thấy khó chịu khi bắt đầu vận động bàn tay trở lại. Các điểm số chức năng bàn tay (hand normality scores), đo lường mức độ hoạt động hiệu quả của bàn tay, thường được cải thiện sau phẫu thuật. Nhiều bệnh nhân đạt được lợi ích chức năng đáng kể nhờ việc sửa chữa biến dạng. Tuy nhiên, nguy cơ biến chứng với cắt cân gan bàn tay từng phần là đáng kể. Bạn nên thảo luận về những nguy cơ này với bác sĩ phẫu thuật của mình.

Tái phát là phổ biến. Các nghiên cứu cho thấy tỷ lệ tái phát sau điều trị là thường xuyên, với thời gian theo dõi trung bình là 3,8 năm. Ngay cả khi phẫu thuật thành công, tình trạng co rút khớp có thể quay trở lại. Khoảng 10% bệnh nhân được điều trị bằng tiêm collagenase phải phẫu thuật trong vòng năm năm. Tỷ lệ can thiệp lại trong dài hạn cao hơn với điều trị bằng collagenase so với cắt cân gan bàn tay. Cắt cân gan bàn tay có tỷ lệ can thiệp lại thấp nhất so với cắt gân bằng kim và tiêm collagenase.

Nếu bạn đã từng được cắt dây chằng gây kẹt ngón tay (trigger finger release), bạn có thể có khả năng cao hơn mắc bệnh Dupuytren khởi phát mới. Tình trạng này có thể xuất hiện sớm hơn so với những người khác. Bác sĩ phẫu thuật của bạn sẽ theo dõi chặt chẽ bàn tay của bạn để quản lý bất kỳ thay đổi nào.

Các lựa chọn không phẫu thuật như cắt gân bằng kim (needle fasciotomy) hoặc tiêm collagenase mang lại những cải thiện có ý nghĩa lâm sàng cho bệnh tái phát. Các phương pháp này có nguy cơ biến chứng thấp. Tuy nhiên, chúng có thể yêu cầu các lần điều trị lặp lại thường xuyên hơn theo thời gian. Bác sĩ phẫu thuật của bạn sẽ giúp bạn lựa chọn phương pháp phù hợp nhất với lối sống và giai đoạn bệnh của bạn.

Cuối cùng, mục tiêu là duy trì chức năng của bàn tay cho các hoạt động hàng ngày. Mặc dù chúng tôi không thể đảm bảo bệnh sẽ không tái phát, chúng tôi hướng tới việc mang lại khả năng sử dụng bàn tay tốt nhất có thể cho bạn trong thời gian dài nhất có thể. Việc theo dõi định kỳ đảm bảo chúng tôi có thể điều chỉnh kế hoạch chăm sóc của bạn khi cần thiết.

Khi nào cần gặp bác sĩ

Hãy gặp bác sĩ đa khoa nếu bạn nhận thấy các ngón tay của mình từ từ cong vào trong hoặc gặp khó khăn khi đặt bàn tay phẳng trên mặt bàn. Hãy yêu cầu đánh giá bởi chuyên gia nếu bạn trải qua tình trạng đau dai dẳng không cải thiện khi nghỉ ngơi, hoặc nếu bàn tay của bạn cảm thấy yếu hoặc không vững. Hãy tìm kiếm chăm sóc y tế nếu các ngón tay của bạn bị khóa hoặc đột ngột mất sức, hoặc nếu các triệu chứng ảnh hưởng đến giấc ngủ hoặc công việc của bạn. Sự xấu đi đột ngột của các dấu hiệu này cũng cần được kiểm tra. Việc đánh giá sớm giúp bác sĩ phẫu thuật hiểu rõ sự tiến triển của bệnh và thảo luận về các lựa chọn quản lý tốt nhất dành cho bạn.


Evidence & references

This is the clinical evidence summary written for health professionals. It is technical, and it lists the research this page was built from. You do not need to read it to understand your treatment or to make a decision about it.

Overview

  • Little agreement exists on treatment recommendations for common presentations of Dupuytren disease among international hand surgeons [1].
  • Clinically important Dupuytren's disease is common in the general population [2].
  • A majority of diagnosed individuals with Dupuytren's disease undergo treatment [2].
  • The best treatment for Dupuytren contractures continues to be fiercely debated [3].
  • Dupuytren disease is progressive [3].
  • The pace of Dupuytren disease progression is unique to each patient [3].
  • Best treatments for Dupuytren disease remain uncertain [3].
  • The literature does not provide evidence in favor of a specific procedure for Dupuytren's disease due to inconsistencies in reporting complications [4].
  • The literature lacks a standardized definition for complications in Dupuytren's disease [4].
  • Patients with Dupuytren's disease may gain significant functional benefit following surgical improvement or correction of the deformity [5].
  • There remains limited evidence to guide the management of patients with Dupuytren's contracture [6].
  • Several procedural options exist for the treatment of Dupuytren disease [7].
  • Advancements in surgical and therapy management for Dupuytren's disease include indications, surgical options, non-surgical techniques, and therapy interventions [9].
  • Dermofasciectomy appears to be a highly effective surgical intervention for advanced Dupuytren disease [14].
  • Dermofasciectomy offers substantial long-term benefits in terms of function and disease control for advanced Dupuytren disease [14].
  • Surgery remains the gold-standard treatment for progressive Dupuytren contractures [17].
  • Limited palmar fasciectomy is the most common surgical option for Dupuytren's disease [17].
  • Many treatment options exist for Dupuytren contracture, each with its own complication profile [19].
  • Surgical treatment in the form of partial or selective fasciectomy remains the most reliable method for treating Dupuytren's disease [24].
  • Partial or selective fasciectomy is the most widely used method for treating Dupuytren's disease [24].

Anatomy & Pathophysiology

  • A revised severity staging system incorporating total flexion deformity and additional clinical risk factors provides a more objective and precise method for assessing Dupuytren's disease severity and may predict surgical outcomes [8].
  • Surgery remains the gold-standard treatment for progressive Dupuytren contractures, with limited palmar fasciectomy being the most common option [17].
  • Collagenase clostridium histolyticum (CCH) is a safe, effective treatment to improve hand function in Dupuytren's contracture, with most adverse events being minor and self-resolving [25].
  • A simple staged procedure is a valid alternative in the management of severe Dupuytren's proximal interphalangeal joint (PIPJ) contracture, demonstrating reliable, reproducible correction of the deformity and acceptable patient outcomes [28].
  • Safety and social issues of hand function and quality of life have an evident association with functional recovery after surgery and hand therapy [34].
  • Hand therapy after collagenase treatment is utilized to discuss results and support recovery [35].
  • Hand therapy should acknowledge patients' individual experiences and support self-modifications and development of new skills [37].
  • The incidence of skin tears after collagenase injection does not affect patient-reported outcomes six months later, but the incidence of skin tears is significantly associated with the severity of pre-treatment finger extension deficits [38].
  • No differences were observed in self-reported upper limb disability or active range of motion between patients receiving routine night-time splinting and those receiving hand therapy only after fasciectomy or dermo-fasciectomy [39].
  • Repeat collagenase treatment of previously treated digits yields similar deformity correction and complete correction rates but a higher incidence of adverse events compared to initial treatment [40].
  • Female sex and release of more than one digit are significant predictors of developing Complex Regional Pain Syndrome (CRPS) following treatment of Dupuytren contracture [41].
  • Soft tissue distraction prior to radialization can successfully realign the carpus and wrist over the ulna, but some minor recurrence must still be expected in the mid-term [44].
  • There were no significant differences in the reduction of PIP contracture, range of motion, and patient-reported outcomes between percutaneous needle fasciotomy and collagenase treatment at 2-year follow-up [46].
  • A novel patient-specific visual analogue survey (PVS) is validated in patients treated with collagenase injection for Dupuytren's disease and is readily adaptable for use in other musculoskeletal diseases [47].
  • Clinically relevant contracture correction was comparable between limited fasciectomy (LF), percutaneous needle fasciotomy (PNF), and CCH, but CCH had a higher risk of minor complications and LF had the longest time to recurrence [48].
  • In the absence of evidence that collagenase effects on cord morphology are better than needle fasciotomy, needle fasciotomy remains the first line of treatment for an uncomplicated Dupuytren's cord at the metacarpophalangeal (MCP) joint [49].

Classification

  • Dupuytren disease is a progressive condition of genetic origin [10].
  • The pathophysiology of Dupuytren disease is multifactorial, involving myofibroblast proliferation and altered collagen matrix composition [10].
  • The prevalence of Dupuytren's disease varies extremely across different geographical locations [21].
  • It is unclear whether the geographical variation in Dupuytren's disease prevalence is due to genetic, environmental, or combined factors [21].
  • Dorsal Dupuytren's nodules are encountered only in patients with Dupuytren's disease [12].
  • Dorsal Dupuytren's nodules are especially prevalent among patients with strong diathesis [12].
  • Histological staging is a reliable method for predicting recurrence of Dupuytren's disease [23].
  • Histological Type I (proliferative) carries the highest risk of recurrence [23].
  • Histological Type III (fibrotic) carries the lowest risk of recurrence [23].
  • The revised Tubiana's staging system incorporates total flexion deformity and additional clinical risk factors to assess disease severity [8].
  • The revised Tubiana's staging system provides a more objective and precise method for assessing Dupuytren's disease severity compared to prior methods [8].
  • The revised Tubiana's staging system may predict surgical outcomes [8].
  • The URAM scale is the first patient-reported functional measure for assessing Dupuytren's disease–specific disability [15].

Clinical Presentation

  • Dupuytren disease is a progressive condition of genetic origin with a multifactorial pathophysiology involving myofibroblast proliferation and altered collagen matrix composition [10].
  • Histological specimens of Dupuytren's disease are not characterized by apoptotic cells, suggesting proliferating cells may be primed for death if they fail to receive an appropriate survival signal [22].
  • Dermal fibromatosis exists in the absence of clinical features of skin involvement, and the skin may have a greater role in the development and propagation of Dupuytren's disease than previously thought [29].
  • Clinically important Dupuytren's disease is common in the general population, with a majority of diagnosed individuals undergoing treatment [2].
  • The prevalence of Dupuytren's Disease in different geographical locations is extremely variable, and it is not clear whether this is genetic, environmental, or a combination of both [21].
  • Dorsal Dupuytren's nodules are encountered only in Dupuytren's disease patients, especially among those with strong diathesis [12].
  • Dupuytren's disease in women presents similarly to men with more severe PIP joint involvement but equivalent surgical outcomes regarding final contracture correction, recurrence, and complication rates [16].
  • There is as much unknown as known about Dupuytren's disease, and even current knowledge may not be absolutely correct [18].
  • The revised Tubiana's staging system incorporates total flexion deformity and additional clinical risk factors to provide a more objective and precise method for assessing Dupuytren's disease severity [8].
  • The URAM scale is the first patient-reported functional measure for Dupuytren's disease [15].

Investigations

  • The pace of disease progression is unique to each patient [3].
  • Dupuytren's disease in women presents similarly to men with more severe proximal interphalangeal (PIP) joint involvement but equivalent surgical outcomes regarding final contracture correction, recurrence, and complication rates [16].
  • The revised Tubiana's staging system, which incorporates total flexion deformity and additional clinical risk factors, provides a more objective and precise method for assessing Dupuytren's disease severity and may predict surgical outcomes [8].
  • Histological staging is a reliable method for predicting recurrence of Dupuytren's disease, with Type I (proliferative) having the highest risk and Type III (fibrotic) the lowest [23].
  • There is limited evidence to guide the management of patients with Dupuytren's contracture [6].
  • The best treatment for Dupuytren contractures continues to be fiercely debated, and best treatments remain uncertain [3].
  • The literature does not provide evidence in favor of a specific procedure for Dupuytren's disease due to inconsistencies in reporting complications as well as the lack of a standardized definition [4].
  • Despite extensive literature, there is as much unknown as known about Dupuytren's disease, and even current knowledge may not be absolutely correct [18].

Treatment

  • Dupuytren disease is progressive, but the pace is unique to each patient [3].
  • Therapy interventions assist in linking patient-specific problems to appropriate treatment choices [9].
  • There is a low level of evidence that both surgical and nonsurgical treatments provide clinically important improvements for recurrent Dupuytren contracture [11].
  • Segmental aponeurectomy with Z-Plasty has a role in the management of Dupuytren's disease with flexion contracture predominantly involving the MCPJ [13].
  • Limited palmar fasciectomy is the most common surgical option for Dupuytren contractures [17].
  • The recurrence rate of Collagenase Clostridium Histolyticum (CCH) is comparable to other standard treatments [20].
  • There is an absence of long-term adverse events 3 years after initial CCH treatment [20].
  • CCH is an effective and safe treatment for Dupuytren contracture [20].
  • The best available published evidence indicates that surgical treatment in the form of partial or selective fasciectomy remains the most reliable method for treating Dupuytren's disease [24].
  • CCH is a safe, effective treatment to improve hand function in Dupuytren's contracture [25].
  • Most adverse events associated with CCH are minor and self-resolving [25].
  • CCH may not provide durable contracture reduction [30].
  • CCH remains a viable nonsurgical treatment for Dupuytren's disease [30].
  • High-energy focused extracorporeal shockwave therapy relieved pain in Dupuytren's disease in a series of seven hands [31].
  • A doublemasked randomized controlled trial is warranted to elucidate the value of extracorporeal shockwave therapy in Dupuytren's disease as a non-invasive treatment option to reduce pain [31].
  • Surgical intervention for Dupuytren contractures achieves a high rate of full or almost full correction (75%) [33].

Complications

  • There is little agreement among international hand surgeons on treatment recommendations for common presentations of Dupuytren disease [1].
  • Clinically important Dupuytren's disease is common in the general population, with a majority of diagnosed individuals undergoing treatment [2].
  • The best treatment for Dupuytren contractures remains uncertain and is fiercely debated [3].
  • Dupuytren disease is progressive, but the pace of progression is unique to each patient [3].
  • The literature does not provide evidence in favor of a specific procedure for Dupuytren's disease due to inconsistencies in reporting complications [4].
  • There is a lack of a standardized definition for complications in Dupuytren's disease literature [4].
  • Patients with Dupuytren's disease may gain significant functional benefit following surgical improvement or correction of the deformity [5].
  • There remains limited evidence to guide the management of patients with Dupuytren's contracture [6].
  • The revised Tubiana's staging system incorporates total flexion deformity and additional clinical risk factors to assess disease severity [8].
  • The revised severity staging system provides a more objective and precise method for assessing Dupuytren's disease severity [8].
  • The revised severity staging system may predict surgical outcomes [8].
  • Dupuytren disease is a progressive condition of genetic origin [10].
  • Dupuytren disease has a multifactorial pathophysiology involving myofibroblast proliferation and altered collagen matrix composition [10].
  • There is a low level of evidence that both surgical and nonsurgical treatments provide clinically important improvements for recurrent Dupuytren contracture [11].
  • Dorsal Dupuytren's nodules are encountered only in Dupuytren's disease patients [12].
  • Dorsal Dupuytren's nodules are especially prevalent among patients with strong diathesis [12].
  • Dermofasciectomy appears to be a highly effective surgical intervention for advanced Dupuytren disease [14].
  • Dermofasciectomy offers substantial long-term benefits in terms of function and disease control for advanced Dupuytren disease [14].
  • Dupuytren's disease in women presents similarly to men with more severe proximal interphalangeal (PIP) joint involvement [16].
  • Women with Dupuytren's disease have equivalent surgical outcomes regarding final contracture correction, recurrence, and complication rates compared to men [16].
  • There is as much unknown as known about Dupuytren's disease despite extensive literature [18].
  • Even current knowledge about Dupuytren's disease may not be absolutely correct [18].
  • Many treatment options exist for Dupuytren contracture, each with its own complication profile [19].
  • The recurrence rate of collagenase clostridium histolyticum (CCH) treatment is comparable to other standard treatments [20].
  • There is an absence of long-term adverse events 3 years after initial CCH treatment [20].
  • CCH is an effective and safe treatment for Dupuytren contracture [20].
  • Long-term overall reintervention rates following treatment of Dupuytren contracture affecting a single digit were higher with CCH than with surgical fasciectomy [26].
  • Perceived recurrence rates following treatment of Dupuytren contracture affecting a single digit were higher with CCH than with surgical fasciectomy [26].
  • These findings compare groups with similar baseline characteristics [26].
  • At 3 months and 1 year, the outcomes of needle fasciotomy and collagenase injection are the same in Dupuytren's disease with predominantly metacarpophalangeal joint involvement [27].
  • Large-scale epidemiological studies are needed to accurately report Dupuytren's disease in the modern U.S. population [32].

Recovery

  • Histological specimens of Dupuytren's disease were not characterized by apoptotic cells, suggesting proliferating cells may be primed for death if they fail to receive an appropriate survival signal [22].
  • Patients with Dupuytren's disease of the hand may gain a significant functional benefit following surgical improvement or correction of the deformity [5].
  • Dermofasciectomy appears to be a highly effective surgical intervention for advanced Dupuytren disease, offering substantial long-term benefits in terms of function and disease control [14].
  • Hospitalization for surgery for Dupuytren's disease in France still represents a meaningful economic burden despite shortening of hospital stays over time [45].
  • There is low level of evidence that both surgical and nonsurgical treatments provide clinically important improvements for recurrent Dupuytren contracture [11].
  • The recurrence rate following treatment with Collagenase Clostridium Histolyticum (CCH) is comparable to other standard treatments [20].
  • There is an absence of long-term adverse events 3 years after initial treatment with CCH, indicating it is an effective and safe treatment for Dupuytren contracture [20].
  • Long-term overall reintervention and perceived recurrence following treatment of Dupuytren contracture affecting a single digit were higher with CCH treatment than surgical fasciectomy when comparing groups with similar baseline characteristics [26].
  • Initial evaluation of long-term recurrence rates suggests disease recurrence or progression in 4 out of 6 patients with MCP contractures and 2 patients with PIP contractures following collagenase injection [42].
  • Recurrence following collagenase injection was generally less severe than the initial contracture in the MCP group [42].
  • At 3 months and 1 year, the outcomes of needle fasciotomy and collagenase injection are the same in Dupuytren's disease with predominantly metacarpophalangeal joint involvement [27].
  • Static night splintage may have a role in the treatment of early stages of Dupuytren's disease, with greatest benefit noted in the early proliferative phase [43].
  • The Unité Rhumatologique des Affections de la Main (URAM) scale is the first patient-reported functional measure for Dupuytren's disease [15].

Key Evidence

  • [L4] Little agreement exists on treatment recommendations for common presentations of Dupuytren disease in this sample of international hand surgeons. [1] (10.1016/j.jhsa.2017.08.023)
  • [L3] Clinically important Dupuytren's disease is common in the general population, with a majority of diagnosed individuals undergoing treatment. [2] (10.1177/1753193416687914)
  • [L5] The best treatment for Dupuytren contractures continues to be fiercely debated; what is known is that Dupuytren disease is progressive, but the pace is unique to each patient, and best treatments remain uncertain. [3] (10.2106/jbjs.18.00282)
  • [L4] The literature does not provide evidence in favor of a specific procedure for Dupuytren's disease due to inconsistencies in reporting complications as well as the lack of a standardized definition. [4] (10.1016/j.hansur.2017.07.002)
  • [L4] Patients with Dupuytren's disease of the hand may gain a significant functional benefit following surgical improvement or correction of the deformity. [5] (10.1308/003588406x83104)
  • [L2] Currently there remains limited evidence to guide the management of patients with Dupuytren's contracture. [6] (10.1302/0301-620x.100b9.bjj-2017-1194.r2)
  • [L4] There are several procedural options for the treatment of Dupuytren disease. [7] (10.1177/1558944718787281)
  • [L4] The revised severity staging system, which incorporates total flexion deformity and additional clinical risk factors, provides a more objective and precise method for assessing Dupuytren's disease severity and may predict surgical outcomes. [8] (10.1007/s11552-007-9071-1)
  • [L5] The article highlights advancements in surgical and therapy management for Dupuytren's disease, reviewing indications, surgical options, non-surgical techniques, and therapy interventions to assist in linking patient-specific problems to appropriate treatment choices. [9] (10.1016/j.jht.2013.10.006)
  • [L5] Dupuytren disease is a progressive condition of genetic origin with a multifactorial pathophysiology involving myofibroblast proliferation and altered collagen matrix composition. [10] (10.5435/00124635-201112000-00005)
  • [L1] There is low level of evidence that both surgical and nonsurgical treatments provide clinically important improvements for recurrent Dupuytren contracture. [11] (10.1177/1558944721994220)
  • [L3] Dorsal Dupuytren's nodules are encountered only in Dupuytren's disease patients, especially among those with strong diathesis. [12] (10.1016/j.jhsa.2010.06.001)
  • [Paper] It has a role in the management of Dupuytren's disease with flexion contracture predominantly involving the MCPJ. [13] (10.1016/j.otsr.2019.08.016)
  • [L3] Dermofasciectomy appears to be a highly effective surgical intervention for advanced Dupuytren disease, offering substantial long-term benefits in terms of function and disease control. [14] (10.1016/j.jhsa.2025.02.007)
  • [L4] We provide the first patient-reported functional measure for Dupuytren's disease. [15] (10.1002/acr.20564)
  • [L3] Dupuytren's disease in women presents similarly to men with more severe PIP joint involvement but equivalent surgical outcomes regarding final contracture correction, recurrence, and complication rates. [16] (10.1016/j.jhsa.2007.06.015)
  • [L4] Surgery remains the gold-standard treatment for progressive Dupuytren contractures, with limited palmar fasciectomy being the most common option. [17] (10.1016/j.jhsa.2011.03.002)
  • [L5] Despite extensive literature, there is as much unknown as known about Dupuytren's disease, and even current knowledge may not be absolutely correct. [18] (10.1177/1753193417715773)
  • [L5] Many treatment options exist for Dupuytren contracture, each with its own complication profile. [19] (10.1016/j.hcl.2018.03.007)
  • [L4] The recurrence rate, which is comparable to other standard treatments, and the absence of long-term adverse events 3 years after initial treatment indicate that CCH is an effective and safe treatment for Dupuytren contracture. [20] (10.1016/j.jhsa.2012.09.028)
  • [L4] The prevalence of Dupuytren's Disease in different geographical locations is extremely variable, and it is not clear whether this is genetic, environmental, or a combination of both. [21] (10.1007/s11552-008-9160-9)
  • [L4] Histological specimens of Dupuytren's disease were not characterized by apoptotic cells, suggesting proliferating cells may be primed for death if they fail to receive an appropriate survival signal. [22] (10.1054/jhsb.1999.0251)
  • [L3] Histological staging is a reliable method for predicting recurrence of Dupuytren's disease, with Type I (proliferative) having the highest risk and Type III (fibrotic) the lowest. [23] (10.1177/1753193408103729)
  • [L5] The best available published evidence indicates that surgical treatment in the form of partial or selective fasciectomy remains the most reliable and the most widely used method for treating Dupuytren's disease. [24] (10.1016/j.jhsa.2008.05.027)
  • [L2] CCH is a safe, effective treatment to improve hand function in Dupuytren's contracture, with most adverse events being minor and self-resolving. [25] (10.1177/1558944720974119)
  • [L4] Long-term overall reintervention and perceived recurrence following treatment of Dupuytren contracture affecting a single digit were higher with CCH treatment than surgical fasciectomy when comparing groups with similar baseline characteristics. [26] (10.1016/j.jhsa.2021.05.022)
  • [L2] At 3 months and 1 year, the outcomes of needle fasciotomy and collagenase injection are the same in Dupuytren's disease with predominantly metacarpophalangeal joint involvement. [27] (10.1177/1753193415617385)
  • [L4] The simple staged procedure is a valid alternative in the management of severe Dupuytren's PIPJ contracture, demonstrating reliable, reproducible correction of the deformity and acceptable patient outcomes. [28] (10.1177/1753193412439673)
  • [L3] Dermal fibromatosis exists in the absence of clinical features of skin involvement, and we hypothesize that the skin may have a greater role in the development and propagation of Dupuytren's disease than previously thought. [29] (10.1177/1753193415601353)
  • [L4] While initially effective, CCH may not provide durable contracture reduction, but remains a viable nonsurgical treatment for Dupuytren's disease. [30] (10.1007/s11552-013-9524-7)
  • [L4] A doublemasked randomized controlled trial is warranted to elucidate the value of extracorporeal shockwave therapy in Dupuytren's disease of the hand as a non-invasive treatment option to reduce pain. [31] (10.23736/s1973-9087.18.05498-9)
  • [L3] Large-scale epidemiological studies are needed to accurately report Dupuytren's disease in the modern U.S. population. [32] (10.1007/s11552-007-9076-9)
  • [L5] Surgical intervention for Dupuytren contractures achieves a high rate of full or almost full correction (75%). [33] (10.1016/j.hcl.2018.04.002)
  • [L4] Safety and social issues of hand function and quality of life had an evident association with functional recovery. [34] (10.1016/j.jht.2014.11.006)
  • [L2] Results after 9 month follow-up, hand therapy after treatment will be presented in detail and discussed. [35] (10.1016/j.jht.2010.09.006)
  • [L4] A clinical implication for hand therapy is to acknowledge patients' individual experiences and support self-modifications and development of new skills. [37] (10.1016/j.jht.2019.04.004)
  • [L2] The incidence of skin tears after collagenase injection does not affect patient-reported outcomes six months later, but the incidence of skin tears is significantly associated with the severity of pre-treatment finger extension deficits. [38] (10.1177/1753193420941329)
  • [L1] No differences were observed in self-reported upper limb disability or active range of motion between patients receiving routine night-time splinting and those receiving hand therapy only. [39] (10.1186/1471-2474-12-136)
  • [L4] Repeat collagenase treatment of previously treated digits yields similar deformity correction and complete correction rates but a higher incidence of adverse events compared to initial treatment. [40] (10.1016/j.jhsa.2023.03.026)
  • [L3] Female sex and release of more than one digit are significant predictors of developing CRPS. [41] (10.1177/1558944720963915)
  • [L4] Initial evaluation of long-term recurrence rates suggests disease recurrence or progression in 4 out of 6 patients with MCP contractures and 2 patients with PIP contractures; however, recurrence was generally less severe than the initial contracture in the MCP group. [42] (10.1016/j.jhsa.2010.01.003)
  • [L4] This study indicates that there may be a role for static night splintage in the treatment of early stages of Dupuytren's disease, with greatest benefit noted in the early proliferative phase. [43] (10.1177/175899830200700302)
  • [L4] Soft tissue distraction prior to radialization can successfully realign the carpus and wrist over the ulna, but some minor recurrence must still be expected in the mid-term. [44] (10.1177/17531934221095681)
  • [L3] Despite shortening of hospital stays over time, hospitalization for surgery for Dupuytren's disease in France still represents a meaningful economic burden. [45] (10.1016/j.otsr.2014.05.013)
  • [L2] There were no significant differences in the reduction of PIP contracture, range of motion, and patient-reported outcomes between the two treatments. [46] (10.1016/j.jhsa.2018.06.093)
  • [L2] It is also readily adaptable for use in other diseases, particularly within musculoskeletal medicine. [47] (10.1136/jisakos-2019-000301)
  • [L1] Overall, the clinically relevant contracture correction was comparable between LF, PNF and CCH, but CCH had a higher risk of minor complications and LF had the longest time to recurrence. [48] (10.1177/17531934251338349)
  • [L2] In the absence of evidence that collagenase effects on cord morphology are better, needle fasciotomy remains the first line of treatment for an uncomplicated Dupuytren's cord at the MCP joint. [49] (10.1177/1753193417711594)

References

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[2] Prevalence and incidence of doctor-diagnosed Dupuytren’s disease: a population-based study. Journal of Hand Surgery (European Volume). 2017. DOI: 10.1177/1753193416687914

[3] Dupuytren Disease: Is Collagenase Better Than Needling?. Journal of Bone and Joint Surgery. 2018. DOI: 10.2106/jbjs.18.00282

[4] Complications after treating Dupuytren's disease. A systematic literature review. Hand Surgery and Rehabilitation. 2017. DOI: 10.1016/j.hansur.2017.07.002

[5] Management of Dupuytren's Disease – Clear Advice for an Elusive Condition. The Annals of The Royal College of Surgeons of England. 2006. DOI: 10.1308/003588406x83104

[6] Treatment of Dupuytren’s contracture. The Bone & Joint Journal. 2018. DOI: 10.1302/0301-620x.100b9.bjj-2017-1194.r2

[7] Dupuytren Disease Management Trends: A Survey of Hand Surgeons. HAND. 2018. DOI: 10.1177/1558944718787281

[8] Revised Tubiana's Staging System for Assessment of Disease Severity in Dupuytren's Disease—Preliminary Clinical Findings. HAND. 2007. DOI: 10.1007/s11552-007-9071-1

[9] Surgical and therapy update on the management of Dupuytren's disease. Journal of Hand Therapy. 2014. DOI: 10.1016/j.jht.2013.10.006

[10] Dupuytren Disease: An Evolving Understanding of an Age-old Disease. Journal of the American Academy of Orthopaedic Surgeons. 2011. DOI: 10.5435/00124635-201112000-00005

[11] Outcomes of Management of Recurrent Dupuytren Contracture: A Systematic Review and Meta-analysis. HAND. 2021. DOI: 10.1177/1558944721994220

[12] Dorsal Pads Versus Nodules in Normal Population and Dupuytren's Disease Patients. The Journal of Hand Surgery. 2010. DOI: 10.1016/j.jhsa.2010.06.001

[13] Segmental aponeurectomy with Z-Plasty as a treatment option in Dupuytren's disease: A retrospective cohort study. Orthopaedics & Traumatology: Surgery & Research. 2019. DOI: 10.1016/j.otsr.2019.08.016

[14] A Longitudinal Analysis of 281 Cases of Dermofasciectomy Efficacy in Advanced Dupuytren Disease Cases: A 20-Year Perspective. The Journal of Hand Surgery. 2025. DOI: 10.1016/j.jhsa.2025.02.007

[15] Unité Rhumatologique des Affections de la Main (URAM) scale: Development and validation of a tool to assess Dupuytren's disease–specific disability. Arthritis Care & Research. 2011. DOI: 10.1002/acr.20564

[16] Results of Surgical Treatment of Dupuytren’s Disease in Women: A Review of 109 Consecutive Patients. The Journal of Hand Surgery. 2007. DOI: 10.1016/j.jhsa.2007.06.015

[17] The Treatment of Dupuytren Disease. The Journal of Hand Surgery. 2011. DOI: 10.1016/j.jhsa.2011.03.002

[18] Dupuytren’s disease: my personal view. Journal of Hand Surgery (European Volume). 2017. DOI: 10.1177/1753193417715773

[19] Complications of Treatment for Dupuytren Disease. Hand Clinics. 2018. DOI: 10.1016/j.hcl.2018.03.007

[20] Dupuytren Contracture Recurrence Following Treatment with Collagenase Clostridium Histolyticum (CORDLESS Study): 3-Year Data. The Journal of Hand Surgery. 2013. DOI: 10.1016/j.jhsa.2012.09.028

[21] Epidemiological Evaluation of Dupuytren's Disease Incidence and Prevalence Rates in Relation to Etiology. HAND. 2009. DOI: 10.1007/s11552-008-9160-9

[22] Is Dupuytren’s Disease Caused by an Imbalance between Proliferation and Cell Death?. Journal of Hand Surgery. 1999. DOI: 10.1054/jhsb.1999.0251

[23] Histological Staging and Dupuytren's Disease Recurrence or Extension after Surgical Treatment: A Retrospective Study of 124 Patients. Journal of Hand Surgery (European Volume). 2009. DOI: 10.1177/1753193408103729

[24] Nonoperative Treatment of Dupuytren's Disease. The Journal of Hand Surgery. 2008. DOI: 10.1016/j.jhsa.2008.05.027

[25] Treatment of Dupuytren’s Contracture With Collagenase: A Systematic Review. HAND. 2021. DOI: 10.1177/1558944720974119

[26] Limited Fasciectomy Versus Collagenase Clostridium histolyticum for Dupuytren Contracture: A Propensity Score Matched Study of Single Digit Treatment With Minimum 5 Years of Telephone Follow-Up. The Journal of Hand Surgery. 2021. DOI: 10.1016/j.jhsa.2021.05.022

[27] One-year results of needle fasciotomy and collagenase injection in treatment of Dupuytren’s contracture: A two-centre prospective randomized clinical trial. Journal of Hand Surgery (European Volume). 2015. DOI: 10.1177/1753193415617385

[28] Management of severe Dupuytren’s contracture of the proximal interphalangeal joint with use of a central slip facilitation device. Journal of Hand Surgery (European Volume). 2012. DOI: 10.1177/1753193412439673

[29] Skin involvement in Dupuytren’s disease. Journal of Hand Surgery (European Volume). 2015. DOI: 10.1177/1753193415601353

[30] Examining the Efficacy and Maintenance of Contracture Correction after Collagenase Clostridium Histolyticum Treatment for Dupuytren's Disease. HAND. 2013. DOI: 10.1007/s11552-013-9524-7

[31] High-energy focused extracorporeal shockwave therapy relieved pain in Dupuytren's disease: a series of seven hands. European Journal of Physical and Rehabilitation Medicine. 2020. DOI: 10.23736/s1973-9087.18.05498-9

[32] Gender Ratio of Dupuytren's Disease in the Modern U.S. Population. HAND. 2007. DOI: 10.1007/s11552-007-9076-9

[33] Fasciectomy for Dupuytren Contracture. Hand Clinics. 2018. DOI: 10.1016/j.hcl.2018.04.002

[34] Factors affecting functional recovery after surgery and hand therapy in patients with Dupuytren's disease. Journal of Hand Therapy. 2015. DOI: 10.1016/j.jht.2014.11.006

[35] Dupuytren's Contracture—Therapy and Result Following Percutaneous Fasciotomy With Xiaflex (Collagenase). Journal of Hand Therapy. 2010. DOI: 10.1016/j.jht.2010.09.006

[37] Experiences of men living with Dupuytren's disease—Consequences of the disease for hand function and daily activities. Journal of Hand Therapy. 2020. DOI: 10.1016/j.jht.2019.04.004

[38] The influence of skin tears following collagenase treatment of Dupuytren’s disease on treatment outcomes. Journal of Hand Surgery (European Volume). 2020. DOI: 10.1177/1753193420941329

[39] Night-time splinting after fasciectomy or dermo-fasciectomy for Dupuytren's contracture: a pragmatic, multi-centre, randomised controlled trial. BMC Musculoskeletal Disorders. 2011. DOI: 10.1186/1471-2474-12-136

[40] Outcomes Following Repeat Collagenase Treatment of Dupuytren Contracture. The Journal of Hand Surgery. 2024. DOI: 10.1016/j.jhsa.2023.03.026

[41] Separating Fact From Fiction: A Nationwide Longitudinal Examination of Complex Regional Pain Syndrome Following Treatment of Dupuytren Contracture. HAND. 2020. DOI: 10.1177/1558944720963915

[42] Collagenase Injection as Nonsurgical Treatment of Dupuytren's Disease: 8-Year Follow-Up. The Journal of Hand Surgery. 2010. DOI: 10.1016/j.jhsa.2010.01.003

[43] The Use of Splinting as a Non-Surgical Treatment for Dupuytren's Disease: A Pilot Study. The British Journal of Hand Therapy. 2002. DOI: 10.1177/175899830200700302

[44] Patient’s perspective of treatment in Dupuytren’s Disease: collagenase versus limited fasciectomy. Journal of Hand Surgery (European Volume). 2022. DOI: 10.1177/17531934221095681

[45] Hospitalization for Dupuytren's disease: A French national descriptive analysis, 2002 to 2009. Orthopaedics & Traumatology: Surgery & Research. 2014. DOI: 10.1016/j.otsr.2014.05.013

[46] Equivalent Treatment Effect After Percutaneous Needle Fasciotomy and Collagenase Treatment for Dupuytren Contracture: 2-Year Results of a Randomized Controlled Trial With Ultrasonographic Evaluation. The Journal of Hand Surgery. 2018. DOI: 10.1016/j.jhsa.2018.06.093

[47] Novel patient-specific visual analogue survey (PVS) is validated in patients treated with collagenase injection for Dupuytren's disease. Journal of ISAKOS. 2020. DOI: 10.1136/jisakos-2019-000301

[48] Outcomes of limited fasciectomy, needle fasciotomy and collagenase injection for Dupuytren’s disease: a systematic review and meta-analysis of individual patient data. Journal of Hand Surgery (European Volume). 2025. DOI: 10.1177/17531934251338349

[49] Ultrasonographic examination of the ruptured cord after collagenase treatment or needle fasciotomy for Dupuytren’s contracture. Journal of Hand Surgery (European Volume). 2017. DOI: 10.1177/1753193417711594

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Using Creative Commons Public Licenses

Creative Commons public licenses provide a standard set of terms and conditions that creators and other rights holders may use to share original works of authorship and other material subject to copyright and certain other rights specified in the public license below. The following considerations are for informational purposes only, are not exhaustive, and do not form part of our licenses.

Considerations for licensors: Our public licenses are intended for use by those authorized to give the public permission to use material in ways otherwise restricted by copyright and certain other rights. Our licenses are irrevocable. Licensors should read and understand the terms and conditions of the license they choose before applying it. Licensors should also secure all rights necessary before applying our licenses so that the public can reuse the material as expected. Licensors should clearly mark any material not subject to the license. This includes other CC- licensed material, or material used under an exception or limitation to copyright. More considerations for licensors: wiki.creativecommons.org/Considerations_for_licensors

Considerations for the public: By using one of our public licenses, a licensor grants the public permission to use the licensed material under specified terms and conditions. If the licensor's permission is not necessary for any reason--for example, because of any applicable exception or limitation to copyright--then that use is not regulated by the license. Our licenses grant only permissions under copyright and certain other rights that a licensor has authority to grant. Use of the licensed material may still be restricted for other reasons, including because others have copyright or other rights in the material. A licensor may make special requests, such as asking that all changes be marked or described. Although not required by our licenses, you are encouraged to respect those requests where reasonable. More considerations for the public: wiki.creativecommons.org/Considerations_for_licensees


Creative Commons Attribution-NonCommercial 4.0 International Public License

By exercising the Licensed Rights (defined below), You accept and agree to be bound by the terms and conditions of this Creative Commons Attribution-NonCommercial 4.0 International Public License ("Public License"). To the extent this Public License may be interpreted as a contract, You are granted the Licensed Rights in consideration of Your acceptance of these terms and conditions, and the Licensor grants You such rights in consideration of benefits the Licensor receives from making the Licensed Material available under these terms and conditions.

Section 1 -- Definitions.

a. Adapted Material means material subject to Copyright and Similar Rights that is derived from or based upon the Licensed Material and in which the Licensed Material is translated, altered, arranged, transformed, or otherwise modified in a manner requiring permission under the Copyright and Similar Rights held by the Licensor. For purposes of this Public License, where the Licensed Material is a musical work, performance, or sound recording, Adapted Material is always produced where the Licensed Material is synched in timed relation with a moving image.

b. Adapter's License means the license You apply to Your Copyright and Similar Rights in Your contributions to Adapted Material in accordance with the terms and conditions of this Public License.

c. Copyright and Similar Rights means copyright and/or similar rights closely related to copyright including, without limitation, performance, broadcast, sound recording, and Sui Generis Database Rights, without regard to how the rights are labeled or categorized. For purposes of this Public License, the rights specified in Section 2(b)(1)-(2) are not Copyright and Similar Rights.

d. Effective Technological Measures means those measures that, in the absence of proper authority, may not be circumvented under laws fulfilling obligations under Article 11 of the WIPO Copyright Treaty adopted on December 20, 1996, and/or similar international agreements.

e. Exceptions and Limitations means fair use, fair dealing, and/or any other exception or limitation to Copyright and Similar Rights that applies to Your use of the Licensed Material.

f. Licensed Material means the artistic or literary work, database, or other material to which the Licensor applied this Public License.

g. Licensed Rights means the rights granted to You subject to the terms and conditions of this Public License, which are limited to all Copyright and Similar Rights that apply to Your use of the Licensed Material and that the Licensor has authority to license.

h. Licensor means the individual(s) or entity(ies) granting rights under this Public License.

i. NonCommercial means not primarily intended for or directed towards commercial advantage or monetary compensation. For purposes of this Public License, the exchange of the Licensed Material for other material subject to Copyright and Similar Rights by digital file-sharing or similar means is NonCommercial provided there is no payment of monetary compensation in connection with the exchange.

j. Share means to provide material to the public by any means or process that requires permission under the Licensed Rights, such as reproduction, public display, public performance, distribution, dissemination, communication, or importation, and to make material available to the public including in ways that members of the public may access the material from a place and at a time individually chosen by them.

k. Sui Generis Database Rights means rights other than copyright resulting from Directive 96/9/EC of the European Parliament and of the Council of 11 March 1996 on the legal protection of databases, as amended and/or succeeded, as well as other essentially equivalent rights anywhere in the world.

l. You means the individual or entity exercising the Licensed Rights under this Public License. Your has a corresponding meaning.

Section 2 -- Scope.

a. License grant.

1. Subject to the terms and conditions of this Public License, the Licensor hereby grants You a worldwide, royalty-free, non-sublicensable, non-exclusive, irrevocable license to exercise the Licensed Rights in the Licensed Material to:

a. reproduce and Share the Licensed Material, in whole or in part, for NonCommercial purposes only; and

b. produce, reproduce, and Share Adapted Material for NonCommercial purposes only.

2. Exceptions and Limitations. For the avoidance of doubt, where Exceptions and Limitations apply to Your use, this Public License does not apply, and You do not need to comply with its terms and conditions.

3. Term. The term of this Public License is specified in Section 6(a).

4. Media and formats; technical modifications allowed. The Licensor authorizes You to exercise the Licensed Rights in all media and formats whether now known or hereafter created, and to make technical modifications necessary to do so. The Licensor waives and/or agrees not to assert any right or authority to forbid You from making technical modifications necessary to exercise the Licensed Rights, including technical modifications necessary to circumvent Effective Technological Measures. For purposes of this Public License, simply making modifications authorized by this Section 2(a) (4) never produces Adapted Material.

5. Downstream recipients.

a. Offer from the Licensor -- Licensed Material. Every recipient of the Licensed Material automatically receives an offer from the Licensor to exercise the Licensed Rights under the terms and conditions of this Public License.

b. No downstream restrictions. You may not offer or impose any additional or different terms or conditions on, or apply any Effective Technological Measures to, the Licensed Material if doing so restricts exercise of the Licensed Rights by any recipient of the Licensed Material.

6. No endorsement. Nothing in this Public License constitutes or may be construed as permission to assert or imply that You are, or that Your use of the Licensed Material is, connected with, or sponsored, endorsed, or granted official status by, the Licensor or others designated to receive attribution as provided in Section 3(a)(1)(A)(i).

b. Other rights.

1. Moral rights, such as the right of integrity, are not licensed under this Public License, nor are publicity, privacy, and/or other similar personality rights; however, to the extent possible, the Licensor waives and/or agrees not to assert any such rights held by the Licensor to the limited extent necessary to allow You to exercise the Licensed Rights, but not otherwise.

2. Patent and trademark rights are not licensed under this Public License.

3. To the extent possible, the Licensor waives any right to collect royalties from You for the exercise of the Licensed Rights, whether directly or through a collecting society under any voluntary or waivable statutory or compulsory licensing scheme. In all other cases the Licensor expressly reserves any right to collect such royalties, including when the Licensed Material is used other than for NonCommercial purposes.

Section 3 -- License Conditions.

Your exercise of the Licensed Rights is expressly made subject to the following conditions.

a. Attribution.

1. If You Share the Licensed Material (including in modified form), You must:

a. retain the following if it is supplied by the Licensor with the Licensed Material:

i. identification of the creator(s) of the Licensed Material and any others designated to receive attribution, in any reasonable manner requested by the Licensor (including by pseudonym if designated);

ii. a copyright notice;

iii. a notice that refers to this Public License;

iv. a notice that refers to the disclaimer of warranties;

v. a URI or hyperlink to the Licensed Material to the extent reasonably practicable;

b. indicate if You modified the Licensed Material and retain an indication of any previous modifications; and

c. indicate the Licensed Material is licensed under this Public License, and include the text of, or the URI or hyperlink to, this Public License.

2. You may satisfy the conditions in Section 3(a)(1) in any reasonable manner based on the medium, means, and context in which You Share the Licensed Material. For example, it may be reasonable to satisfy the conditions by providing a URI or hyperlink to a resource that includes the required information.

3. If requested by the Licensor, You must remove any of the information required by Section 3(a)(1)(A) to the extent reasonably practicable.

4. If You Share Adapted Material You produce, the Adapter's License You apply must not prevent recipients of the Adapted Material from complying with this Public License.

Section 4 -- Sui Generis Database Rights.

Where the Licensed Rights include Sui Generis Database Rights that apply to Your use of the Licensed Material:

a. for the avoidance of doubt, Section 2(a)(1) grants You the right to extract, reuse, reproduce, and Share all or a substantial portion of the contents of the database for NonCommercial purposes only;

b. if You include all or a substantial portion of the database contents in a database in which You have Sui Generis Database Rights, then the database in which You have Sui Generis Database Rights (but not its individual contents) is Adapted Material; and

c. You must comply with the conditions in Section 3(a) if You Share all or a substantial portion of the contents of the database.

For the avoidance of doubt, this Section 4 supplements and does not replace Your obligations under this Public License where the Licensed Rights include other Copyright and Similar Rights.

Section 5 -- Disclaimer of Warranties and Limitation of Liability.

a. UNLESS OTHERWISE SEPARATELY UNDERTAKEN BY THE LICENSOR, TO THE EXTENT POSSIBLE, THE LICENSOR OFFERS THE LICENSED MATERIAL AS-IS AND AS-AVAILABLE, AND MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY KIND CONCERNING THE LICENSED MATERIAL, WHETHER EXPRESS, IMPLIED, STATUTORY, OR OTHER. THIS INCLUDES, WITHOUT LIMITATION, WARRANTIES OF TITLE, MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NON-INFRINGEMENT, ABSENCE OF LATENT OR OTHER DEFECTS, ACCURACY, OR THE PRESENCE OR ABSENCE OF ERRORS, WHETHER OR NOT KNOWN OR DISCOVERABLE. WHERE DISCLAIMERS OF WARRANTIES ARE NOT ALLOWED IN FULL OR IN PART, THIS DISCLAIMER MAY NOT APPLY TO YOU.

b. TO THE EXTENT POSSIBLE, IN NO EVENT WILL THE LICENSOR BE LIABLE TO YOU ON ANY LEGAL THEORY (INCLUDING, WITHOUT LIMITATION, NEGLIGENCE) OR OTHERWISE FOR ANY DIRECT, SPECIAL, INDIRECT, INCIDENTAL, CONSEQUENTIAL, PUNITIVE, EXEMPLARY, OR OTHER LOSSES, COSTS, EXPENSES, OR DAMAGES ARISING OUT OF THIS PUBLIC LICENSE OR USE OF THE LICENSED MATERIAL, EVEN IF THE LICENSOR HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH LOSSES, COSTS, EXPENSES, OR DAMAGES. WHERE A LIMITATION OF LIABILITY IS NOT ALLOWED IN FULL OR IN PART, THIS LIMITATION MAY NOT APPLY TO YOU.

c. The disclaimer of warranties and limitation of liability provided above shall be interpreted in a manner that, to the extent possible, most closely approximates an absolute disclaimer and waiver of all liability.

Section 6 -- Term and Termination.

a. This Public License applies for the term of the Copyright and Similar Rights licensed here. However, if You fail to comply with this Public License, then Your rights under this Public License terminate automatically.

b. Where Your right to use the Licensed Material has terminated under Section 6(a), it reinstates:

1. automatically as of the date the violation is cured, provided it is cured within 30 days of Your discovery of the violation; or

2. upon express reinstatement by the Licensor.

For the avoidance of doubt, this Section 6(b) does not affect any right the Licensor may have to seek remedies for Your violations of this Public License.

c. For the avoidance of doubt, the Licensor may also offer the Licensed Material under separate terms or conditions or stop distributing the Licensed Material at any time; however, doing so will not terminate this Public License.

d. Sections 1, 5, 6, 7, and 8 survive termination of this Public License.

Section 7 -- Other Terms and Conditions.

a. The Licensor shall not be bound by any additional or different terms or conditions communicated by You unless expressly agreed.

b. Any arrangements, understandings, or agreements regarding the Licensed Material not stated herein are separate from and independent of the terms and conditions of this Public License.

Section 8 -- Interpretation.

a. For the avoidance of doubt, this Public License does not, and shall not be interpreted to, reduce, limit, restrict, or impose conditions on any use of the Licensed Material that could lawfully be made without permission under this Public License.

b. To the extent possible, if any provision of this Public License is deemed unenforceable, it shall be automatically reformed to the minimum extent necessary to make it enforceable. If the provision cannot be reformed, it shall be severed from this Public License without affecting the enforceability of the remaining terms and conditions.

c. No term or condition of this Public License will be waived and no failure to comply consented to unless expressly agreed to by the Licensor.

d. Nothing in this Public License constitutes or may be interpreted as a limitation upon, or waiver of, any privileges and immunities that apply to the Licensor or You, including from the legal processes of any jurisdiction or authority.


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