title: Deep branch ulnar neuropathy due to giant cell tumor: report of a case.
abstract: Electrophysiologic studies indicated a lesion of the deep branch of the ulnar nerve in the palm of a 42-year-old man with painless weakness and wasting of ulnar-innervated intrinsic hand muscles. Magnetic resonance imaging of this region demonstrated a soft-tissue mass in the palm distal to Guyon's canal. Surgical exploration disclosed a giant cell tumor of the tendon sheath, compressing the deep branch of the ulnar nerve.
authors.affiliation: Department of Neurology, Mayo Clinic, Rochester, MN 55905.
authors.forename: J C
authors.initials: JC
authors.lastname: Rafecas
authors.forename: J R
authors.initials: JR
authors.lastname: Daube
authors.forename: R L
authors.initials: RL
authors.lastname: Ehman
mesh_terms: D000328:Adult; D005870:Giant Cell Tumors / Q000150:complications*; D006225:Hand; D006801:Humans; D008297:Male; D009408:Nerve Compression Syndromes / Q000209:etiology*; D013710:Tendons; D014459:Ulnar Nerve