Ulnar canal

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The ulnar canal, also called Guyon's canal, is a potential space at the wrist between the pisiform bone and the hamate bone through which the ulnar artery and the ulnar nerve travel into the hand.

[edit] Clinical significance

Entrapment of the ulnar nerve at the ulnar canal can result in ulnar neuropathy at the wrist. There are four subtypes of ulnar neuropathy at the wrist, of which type II is the most common. Guyon's canal entrapment syndrome may be secondary to ganglion cyst or compression against cycling handlebar.