title: Ulnar tunnel syndrome--an unusual cause.
abstract: We describe a case of anomalous muscle belly at Guyon's canal causing ulnar tunnel syndrome with sparing of the motor branch and hypothenar muscles.
authors.affiliation: Department of Plastic, Reconstructive and Hand Surgery, Lister Hospital, Stevenage, United Kingdom.
authors.forename: E P
authors.initials: EP
authors.lastname: Fong
authors.forename: P J
authors.initials: PJ
authors.lastname: Mahaffey
mesh_terms: D000328:Adult; D005260:Female; D006230:Hand Injuries / Q000000981:diagnostic imaging* / Q000209:etiology* / Q000601:surgery; D006801:Humans; D018482:Muscle, Skeletal / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000601:surgery; D011859:Radiography; D013577:Syndrome; D014459:Ulnar Nerve / Q000000981:diagnostic imaging* / Q000503:physiopathology / Q000601:surgery; D017769:Ulnar Nerve Compression Syndromes / Q000000981:diagnostic imaging* / Q000209:etiology* / Q000601:surgery; D014949:Wounds, Nonpenetrating