Clinical Rheumatology

, Volume 31, Issue 7, pp 1139–1142 | Cite as

Bilateral ulnar nerve entrapment by the M. anconeus epitrochlearis. A case report and literature review

  • Ingrid Dekelver
  • Francis Van Glabbeek
  • Henk Dijs
  • Gaëtane Stassijns
Case Based Review


Ulnar neuropathy at the elbow is the second most common entrapment neuropathy. Ulnar nerve entrapment has several causes. A case report is presented with the presence of the M. anconeus epitrochlearis at both sides. The patient contacted our department with chronic, diffuse bilateral elbow pain irradiating into both forearms. She experienced typical nocturnal paresthesias involving digit IV and V of both hands. Tinel’s sign was present just proximal to the medial epicondyle. A bilateral ulnar nerve entrapment was clinically suspected. An electromyographic (EMG) investigation revealed slowing of the motor conduction velocity in the ulnar nerve across the elbow. An ultrasound and MRI investigation demonstrated the presence of an anomalous muscle, called the M. anconeus epitrochlearis, at both sides. Treatment consisted of bilateral surgical excision of the muscle and retinacular release, followed by physical therapy. The outcome was favourable.


M. anconeus epitrochlearis N. ulnaris Nerve entrapment Ulnaropathy 





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Copyright information

© Clinical Rheumatology 2012

Authors and Affiliations

  • Ingrid Dekelver
    • 1
  • Francis Van Glabbeek
    • 2
  • Henk Dijs
    • 1
  • Gaëtane Stassijns
    • 1
  1. 1.Department of Physical Medicine and RehabilitationAntwerp University HospitalEdegemBelgium
  2. 2.Department of OrthopaedicsAntwerp University HospitalEdegemBelgium

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