Orthopedics Book

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Ulnar TunnelAka: Ulnar Neuropathy, Guyon Canal Syndrome

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  1. See Also
    1. Overuse Syndromes of the Hand and Wrist
  2. Epidemiology
    1. Much less common than Median Nerve compression
  3. Etiology: Ulnar Nerve compression
    1. Soft tissue tumors
    2. Ganglion Cyst
    3. Constricting bands or muscles
    4. Ulnar artery thrombosis
  4. Symptoms and Signs
    1. Ulnar Nerve Neuropathy
    2. Affects ulnar 1.5 fingers on palmar surface
    3. Does not affect forearm or finger dorsum
  5. Differential diagnosis
    1. Carpal Tunnel Syndrome
      1. Neuropathy is in Median Nerve distribution
    2. Cubital Tunnel
      1. Affects ulnar innervation over forearm
      2. Affects dorsal 1.5 fingers in ulnar distribution
  6. Management
    1. See Carpal Tunnel Syndrome
    2. Avoid local Corticosteroid Injection

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