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银屑病关节炎

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An inflammatory arthritis linked to psoriasis — sausage digits, nail changes and end-joint involvement — and why early treatment protects the joints.

一只手指关节肿胀且整根手指呈“香肠样”肿胀的手。
银屑病关节炎可导致关节肿胀、整个手指肿胀(腊肠指)以及指甲改变。 Kieran Hirpara 4.0

本页面由机器翻译,尚未经临床医生审核。英文版本为权威版本。

您正在感受到的症状

银屑病关节炎往往悄然发生,而非突然显现。您可能会注意到一个或多个关节(通常位于手指,但也可能涉及手腕或肘部)变得僵硬且酸痛,且僵硬感在清晨或久坐后最为严重,活动后则有所缓解。这种“活动后僵硬感减轻”的模式提示该问题属于炎症性,而非单纯的磨损。

有几个特征尤为典型。整个手指(或脚趾)可能肿胀如小香肠,这被称为指(趾)炎;它可能伴有压痛,并使指(趾)弯曲困难。您可能会观察到指甲的变化:微小的凹坑或凹陷、脊状隆起、指甲呈黄色并从甲床抬起,或边缘碎裂。手指的远端关节(即最靠近指甲的关节)常受累,这在炎症性关节炎中较为少见,是医生诊断时有用的线索。部分患者还会在肌腱附着于骨骼的部位感到疼痛,例如肘部或足跟后侧。

许多银屑病关节炎患者同时患有皮肤疾病银屑病,表现为红色、鳞屑状斑块,常出现在肘部、膝盖或头皮。关节问题可能先于皮肤改变出现,也可能在其之后出现,甚至在没有明显皮肤受累的情况下发生。除了关节症状外,深度疲劳也很常见,且可能是该病症中最令人疲惫的部分之一。

(如果您的主要顾虑是类风湿关节炎或更一般的炎症性关节问题,请参阅我们关于炎症性和类风湿关节炎的独立页面;尽管两者外观可能相似,但银屑病关节炎是一种独立的疾病。)

实际发生的情况

银屑病关节炎是一种免疫驱动性疾病。免疫系统未能保护身体,反而错误地攻击自身组织并引发炎症。导致银屑病鳞屑性皮损的同一错误过程,也可能靶向关节,并特别靶向附着点(entheses),即肌腱和韧带锚定在骨骼上的微小区域。

您所感受到的肿胀、僵硬和疼痛正是这种炎症所致。整个手指呈香肠样的肿胀,源于关节和沿手指分布的腱鞘同时发生炎症。指甲改变和远端指间关节受累,反映了指甲、皮肤与该末端关节之间紧密的解剖联系。

这不是随年龄增长和过度使用而出现的“磨损性”关节炎——骨关节炎;它也与类风湿关节炎不同,尽管这两种炎症性疾病可能表现相似。关键在于,银屑病关节炎是活跃且持续存在的:如果炎症在数年内得不到控制,可能会逐渐损伤甚至导致关节畸形。好消息是,该过程是可治疗的,控制免疫活动可以保护关节免受此类损伤。

我们能做什么

诊断通常由风湿科医生做出,他们是炎症性关节病的专家。没有单一的血液检测可以确诊银屑病关节炎,因此诊断需结合您的病史、关节、指甲和皮肤的检查,以及影像学检查(如X光或超声)综合判断。区分银屑病关节炎与其他类型的关节炎至关重要,因为这会影响治疗方案。

治疗的主要手段是药物治疗,由风湿科主导,旨在抑制免疫过程本身:

  • 改善病情抗风湿药(DMARDs),如甲氨蝶呤,通常是首选。这些药物可抑制过度活跃的免疫反应,并在长期内保护关节。
  • 生物制剂和靶向药物用于DMARDs效果不佳或病情更具侵袭性的情况。这些是精准药物,可阻断驱动炎症的特定免疫信号,对关节、附着点和皮肤均可能非常有效。
  • 皮肤治疗:银屑病的治疗与关节治疗相辅相成,通常需与皮肤科医生协同进行。
  • 手部治疗和运动:保持关节活动度,维持抓握力和功能,并有助于缓解僵硬和疲劳。

手术有一定作用,但作用有限,主要用于那些因多年炎症而已经受损或变形的关节,目的是恢复功能或缓解疼痛。即便如此,控制疾病的药物治疗仍需继续。最重要的信息是早期治疗可保护关节:炎症控制得越早,造成的永久性损伤就越少。

预期情况

银屑病关节炎是一种长期性疾病,而非一次治愈后即可遗忘的状况,但其非常可治疗,且大多数早期开始治疗的患者预后良好。现代治疗的目标是使疾病完全得到控制,使关节的感觉和功能接近正常,对许多人而言这是可以实现的。

由于该病由免疫系统驱动,治疗通常是持续性的,可能需要一些调整才能找到最适合您的药物或药物组合。病情可能时轻时重,表现为缓解期与偶尔的发作期。与风湿病专科医生保持定期联系至关重要,既要抑制炎症,也要监测药物。这种长期承诺的权衡是切实的保护:控制炎症有助于保护您的抓握力、手部功能以及未来数年的关节健康。

何时就医

  • 关节疼痛或肿胀伴晨僵,尤其是整根手指肿胀或活动后僵硬缓解时:这种情况需要评估,理想情况下应由风湿科医生进行。
  • 银屑病伴新发关节症状。 如果您已患有银屑病,且关节开始疼痛、肿胀或僵硬,请告知您的医生;这种关联很重要且容易被忽视。
  • 指甲改变,如凹点、纵嵴、碎裂或指甲与甲床分离,特别是伴随关节或远端指间关节疼痛时。
  • 肌腱与骨骼连接处的疼痛(例如肘部或足跟处),且症状未缓解。
  • 关节随时间推移变得僵硬、畸形或更难使用:这是疾病可能未得到完全控制的迹象,值得复查,以便在造成更多损伤前加强治疗。

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