Which ulnar-sided wrist pain etiologies may be identified during exam of the Guyon canal?

Updated: Nov 22, 2019
  • Author: David M Lichtman, MD; Chief Editor: Harris Gellman, MD  more...
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Answer

Answer

The Guyon canal is located between the pisiform and the hook of hamate. Both the ulnar nerve and ulnar artery course through the canal. Gentle palpation over the canal with a rolling motion often reveals the ulnar nerve. Always palpate for a pulsatile mass in the region. An aneurysm, ganglion cyst, or other soft-tissue mass can compress the ulnar nerve, causing sensory deficits, motor deficits, or both, depending on the location of the mass. Acute thrombosis of the ulnar artery in the Guyon canal can be exquisitely tender and causes peripheral neurovascular signs and symptoms.


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