Sarcoid tenosynovitis in the hand. A case report and literature review.

We report a case of involvement of a finger flexor tendon by sarcoidosis. A review of twelve cases suggests that this is a rare manifestation of the illness that most often affects the finger extensors at the wrist. It tends to present in established sarcoidosis and is associated with a higher than usual incidence of polyarthritis. The main differential diagnosis would be tuberculous tenosynovitis. We suggest that a histological spectrum exists running from a predominantly cellular picture to one of fibrotic nodules, perhaps explaining previously described instances of pseudo-tumour. We would recommend tenosynovectomy in conjunction with corticosteroid therapy as the treatment of choice.