Keimyung Med J.  2017 Jun;36(1):42-45. 10.0000/kmj.2017.36.1.42.

A Variant Extensor Pollicis Brevis Crossing the Anatomical Snuff Box

Affiliations
  • 1Department of Anatomy, Keimyung University School of Medicine, Daegu, Korea. ijchoi@dsmc.or.kr

Abstract

During an educational dissection, accessory tendon of the extensor pollicis brevis muscle was found on the left side in a Korean cadaver. The abductor pollicis longus, extensor pollicis brevis, and extensor pollicis longus muscles showed normal morphology and course: however, narrow muscle belly originated between the extensor pollicis brevis and extensor pollicis longus muscles. It crossed the anatomical snuff box and then inserted on the base of the distal phalanx of the thumb. The author describes this previously novel case report and discusses the clinical implications of such a variant.

Keyword

Anatomical snuff box; Extensor pollicis brevis; Extensor pollicis longus; Variation

MeSH Terms

Cadaver
Muscles
Tendons
Thumb
Tobacco, Smokeless*
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