Unusual Variant of the Extensor Carpi Radialis Brevis Muscle: A Case Report

Hiromichi Mitsuyasu; Ryo Yoshida; Munir Shah; Rita Patterson; Steven F. Viegas

doi:10.1002/ca.10226

Unusual Variant of the Extensor Carpi Radialis Brevis Muscle: A Case Report

Hiromichi Mitsuyasu, Ryo Yoshida, Munir Shah, Rita Patterson, Steven F. Viegas

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3 Scopus citations

Abstract

A variation of the extensor carpi radialis brevis muscle (ECRB) origin was discovered during a cadaveric dissection. The identified ECRB originated from the fascia/tendon of the extensor digitorum communis (EDC), without any of its origin at the usual location on the lateral epicondyle. The ECRB tendon inserted onto the third metacarpal base. A branch of the posterior interosseous nerve innervated the ERCB. This is the first report of an ECRB originating from the EDC fascia/tendon. This unique variation of the ECRB origin may be of clinical interest, especially in the treatment of lateral epicondylitis (tennis elbow).

Original language	English
Pages (from-to)	61-63
Number of pages	3
Journal	Clinical Anatomy
Volume	17
Issue number	1
DOIs	https://doi.org/10.1002/ca.10226
State	Published - 19 Jan 2004

Keywords

Anatomic variation
Extensor carpi radialis brevis
Tennis elbow

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abstract = "A variation of the extensor carpi radialis brevis muscle (ECRB) origin was discovered during a cadaveric dissection. The identified ECRB originated from the fascia/tendon of the extensor digitorum communis (EDC), without any of its origin at the usual location on the lateral epicondyle. The ECRB tendon inserted onto the third metacarpal base. A branch of the posterior interosseous nerve innervated the ERCB. This is the first report of an ECRB originating from the EDC fascia/tendon. This unique variation of the ECRB origin may be of clinical interest, especially in the treatment of lateral epicondylitis (tennis elbow).",

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AU - Mitsuyasu, Hiromichi

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AU - Shah, Munir

AU - Patterson, Rita

AU - Viegas, Steven F.

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AB - A variation of the extensor carpi radialis brevis muscle (ECRB) origin was discovered during a cadaveric dissection. The identified ECRB originated from the fascia/tendon of the extensor digitorum communis (EDC), without any of its origin at the usual location on the lateral epicondyle. The ECRB tendon inserted onto the third metacarpal base. A branch of the posterior interosseous nerve innervated the ERCB. This is the first report of an ECRB originating from the EDC fascia/tendon. This unique variation of the ECRB origin may be of clinical interest, especially in the treatment of lateral epicondylitis (tennis elbow).

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Unusual Variant of the Extensor Carpi Radialis Brevis Muscle: A Case Report

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