Undiagnosed deep ulnar nerve paralysis resulting from stab wounds of the palm.

Stab wounds of the palm may cause laceration of the ulnar deep motor nerve. The acute diagnosis can be very difficult, since had sensation and major tendon function are uninvolved. Three cases are presented with ulnar deep motor paralysis secondary to stab wounds of the palm undiagnosed at the time of injury. The early diagnosis with nerve repair should yield excellent results and prevent permanent paralytic deformity.