Motor neuron presentation of an ulnar neuropathy and Riche-Cannieu anastomosis

Electromyogr Clin Neurophysiol. 2000 Mar;40(2):119-22.

Abstract

A Riche (7)-Cannieu (2) anastomosis (ulnar-to-median anastomosis in the hand) in the setting of an ulnar or median nerve lesion can produce confusing clinical and electrodiagnostic findings. We report a patient with a deep branch ulnar neuropathy complicated by a Riche-Cannieu anastomosis. His clinical presentation led to an initial diagnosis of motor neuron disease. Extensive electrophysiologic studies clarified the extent of the Riche-Cannieu anastomosis and the ulnar neuropathy.

Publication types

  • Case Reports

MeSH terms

  • Adult
  • Diagnosis, Differential
  • Electromyography
  • Hand / innervation*
  • Humans
  • Male
  • Median Nerve / abnormalities*
  • Median Nerve / physiopathology
  • Motor Neuron Disease / diagnosis
  • Motor Neuron Disease / physiopathology
  • Motor Neurons / physiology*
  • Neural Conduction / physiology
  • Ulnar Nerve / abnormalities*
  • Ulnar Nerve / physiopathology
  • Ulnar Neuropathies / diagnosis*
  • Ulnar Neuropathies / physiopathology