The many faces of carpal tunnel syndrome.

Carpal tunnel syndrome, a common and well-described clinical disorder, usually has been considered a chronic disorder with a fixed set of symptoms and typically affecting middle-aged women. Because of the many variations in its initial clinical manifestations, however, its diagnosis at times can be difficult. In this review, we describe nonclassic manifestations of carpal tunnel syndrome and discuss the differential diagnosis, the importance of electrodiagnostic studies, and treatment modalities.