An Accessory Extensor Pollicis Longus Tendon: A Case Report of Rare Anatomical Variant

SUMMARY: Variation in the morphology of the extensor pollicis longus muscle is very rare. The muscle is considered as one of the deep group of dorsal forearm muscles. It passes through the dorsal radiocarpal ligament in a detached compartment. It inserts at the base of the distal phalanx of the thumb. The muscle might have double tendons where they run either in one, or in separate compartments. In this study, we report an extremely rare condition for a 38-year-old male where some of the tendon fibers split at the base of the proximal phalanx and the two tendons insert at the sides of the base of the distal phalanx. We also noticed a high range of hyperextension where the action was painless and showed no sign of discomfort. We believe that the way the tendons get inserted might have a role in this wide range of extension.

Bibliographic Details

Main Authors:	Alsharif,Mohammed H. Karrar, Alfaki,Mamoun A., Elamin,Abubaker Y., Manssor,Elbagir H., Taha,Khalid M., Arafa,Emad M., Aldosari,Khalid Hadi M.
Format:	Digital revista
Language:	English
Published:	Sociedad Chilena de Anatomía 2017
Online Access:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022017000401276
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