Distal ulnar neuropathy as a cause of finger tremor: a case report.

A secretary/typist developed work-related pain along the hypothenar aspect of the dominant hand. This was later followed by involuntary, finally continuous tremorous movements of the 4th and 5th fingers. Electromyographic abnormalities were limited to myokymia of 3rd and 4th interossei muscles. Surgical decompression of Guyon's canal with removal of the pisiform bone resulted in a complete cure.