J Korean Orthop Assoc.  2014 Aug;49(4):312-315. 10.4055/jkoa.2014.49.4.312.

Cubital Tunnel Syndrome by Anconeus Epitrochlearis in an Adolescent

• Lee SU
• Lee J
• Joo SY

• KMID: 2185192
• DOI: http://doi.org/10.4055/jkoa.2014.49.4.312

Abstract

Compression neuropathy of the ulnar nerve due to anconeus epitrochlearis muscle is rare in adolescents. It is usually known that the hypertrophied muscle in adult or weightlifting athletes compresses the ulnar nerve. There were only few case reports in children and adolescent relevant to athletic activities. In this case, a non-athlete 15-year-old girl developed compression ulnar nerve neuropathy caused by an anconeus epitrochearis muscle. This case is remarkable as an anconeus epitrochearis muscle is uncommon in non-athlete children and adolescent since a literature review revealed no previous report.

Keyword

anconeus epitrochlearis; cubital tunnel syndrome; adolescent

MeSH Terms

Adolescent*
Adult
Athletes
Child
Cubital Tunnel Syndrome*
Female
Humans
Sports
Ulnar Nerve

Figure

• 

  Figure 1 (A) The ultrasonograph of right elbow demonstrated anconeus epitrochlearis muscle (asterisk) overlying the ulna nerve (arrow). (B) Transverse T1-weighted magnetic resonance imaging of the elbow showed ulnar nerve (white arrow) compressed by anconeus epitrochlearis muscle (black arrow). ME, medial epicondyle; O, olecranon.

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  Figure 2 (A) Intraoperative finding revealed anconeus epitrochlearis muscle above the cubital tunnel (arrow). The ulnar nerve compressed by the epitrochleoanconeus muscle. (B) After resection of the anconeus epitrochlearis muscle, severe adhesion of the ulnar nerve to the adjacent tissue was noted. (C) Subfascial anterior transposition of the ulnar nerve was performed.

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