Congenital hypoplastic thumb in the Silver syndrome--a case report and review of upper extremity anomalies in the world literature.

A case of classical Silver syndrome presented with a congenital hypoplastic thumb, absent thenar musculature, and partial index ankylosis. No previous association of congenital hypoplastic thumb and the Silver syndrome has been noted by Dr. Silver or described in the world literature. Restoration of thumb function was achieved in this particular case by the abductor digiti minimi transfer described by Huber. The upper extremity anomalies thus far reported with Silver syndrome in the world literature are summarized.