Ulnar nerve compression in Guyon's canal caused by a pseudotumor of the pisiform.

Published online: Sep 27 1995

S A Antuña, C F Gutierrez, and J Paz Jimenez.

Department of Orthopedic Surgery, Asturias Central Hospital, Oviedo, Spain.


A rare case of ulnar nerve compression at the wrist by a hypertrophic pisiform is reported. The patient was treated with pisiform bone excision, and this resulted in complete relief of symptoms with no functional deficit.