Abstract

Guyon’s Canal Syndrome, also known as Ulnar Tunnel Syndrome or Handlebar Palsy, is a relatively rare peripheral ulnar neuropathy. It involves compression of the distal ulnar nerve at the wrist as it passes through a space called Guyon’s canal. This canal is a tight triangular fibroosseous tunnel approximately 1.5 cm long located at the carpus. The syndrome can result from various causes, including compression due to ganglion cysts, occupational traumatic neuritis, musculotendinous arch issues, and ulnar artery disease. Herein, we describe a case of post-traumatic Guyon’s canal syndrome secondary to a ruptured ganglion cyst and triquetrum fracture.

Key words: Guyon’s canal; ulnar nerve; trauma; MRI; ganglion cyst