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This article has been peer reviewed. It is the authors' final version prior to publication in Orthopedic Clinics of North America

Volume 43, Issue 4, October 2012, Pages 467-474.

The published version is available at DOI: 10.1016/j.ocl.2012.07.016. Copyright © Elsevier Inc.


Ulnar tunnel syndrome could be broadly defined as a compressive neuropathy of the ulnar nerve at the level of the wrist. The ulnar tunnel, or Guyon's canal, has a complex and variable anatomy. Various factors may precipitate the onset of ulnar tunnel syndrome. Patient presentation depends on the anatomic zone of ulnar nerve compression: zone I compression, motor and sensory signs and symptoms; zone II compression, isolated motor deficits; and zone III compression; purely sensory deficits. Conservative treatment such as activity modification may be helpful, but often, surgical exploration of the ulnar tunnel with subsequent ulnar nerve decompression is indicated.

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