Eastmond C J, Wright V
Ann Rheum Dis. 1979 Jun;38(3):226-8. doi: 10.1136/ard.38.3.226.
Nail abnormalities occur frequently in patients with psoriatic arthritis. This study of the finger nails of 46 patients with psoriatic arthritis, 100 nonpsoriatic rheumatism patients, and 100 nonpsoriatic general medical patients was designed to characterise these abnormalities with particular reference to the severity of nail pitting. The results of the study suggest: (1) Onycholysis alone in the absence of previous injury to the affected nail is in favour of a psoriatic origin for the nail dystrophy. (2) Two or all of onycholysis, horizontal ridging, and nail pitting in the same patient are in favour of a psoriatic origin for the nail dystrophy. (3) The presence or absence of nail pitting alone is a poor discriminator between psoriatic and other causes for nail dystrophy. (4) More than 20 finger nails pits per person is suggestive of a psoriatic cause for the dystrophy. (5) More than 60 pits per person is unlikely to be found in the absence of psoriasis.
银屑病关节炎患者常出现指甲异常。本研究对46例银屑病关节炎患者、100例非银屑病性风湿病患者和100例非银屑病性普通内科患者的指甲进行了研究，旨在特别参照甲凹点的严重程度来描述这些异常。研究结果表明：（1）在未对患甲有过先前损伤的情况下，仅出现甲剥离有利于指甲营养不良的银屑病起源。（2）同一患者出现甲剥离、横嵴和甲凹点中的两种或全部情况有利于指甲营养不良的银屑病起源。（3）仅甲凹点的有无对银屑病和其他指甲营养不良原因的鉴别作用较差。（4）每人超过20个手指甲凹点提示营养不良由银屑病引起。（5）在无银屑病的情况下，每人不太可能出现超过60个凹点。
