Rafecas J C, Daube J R, Ehman R L
Department of Neurology, Mayo Clinic, Rochester, MN 55905.
Neurology. 1988 Feb;38(2):327-9. doi: 10.1212/wnl.38.2.327.
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.
电生理研究表明，一名42岁男性手掌部尺神经深支受损，其尺神经支配的手部内在肌出现无痛性无力和萎缩。该区域的磁共振成像显示，在Guyon管远端的手掌部有一个软组织肿块。手术探查发现为腱鞘巨细胞瘤，压迫尺神经深支。
