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. Jul-Aug 2014;42(6):371-4.
doi: 10.1002/jcu.22118. Epub 2013 Dec 3.

Sonographic Diagnosis of Anatomical Variations Associated With Carpal Tunnel Syndrome

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Sonographic Diagnosis of Anatomical Variations Associated With Carpal Tunnel Syndrome

P De Franco et al. J Clin Ultrasound. .

Abstract

Bifid median nerve is an anatomic variation that occurs in about 18% of patients with symptoms suggestive of carpal tunnel syndrome and in about 15% of symptom-free subjects. Reversed palmaris longus is a rare anatomic muscular variation. The simultaneous presence of a bifid median nerve and a reversed palmaris longus has been very rarely described, usually during surgical exploration or in cadavers. We present two cases where ultrasound showed the presence of both abnormalities, allowing a correct diagnosis and influencing the treatment plan.

Keywords: bifid median nerve; musculoskeletal; nerve entrapment; peripheral nerves; reversed palmaris longus; sonography.

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