A Rare Variation of the Brachial Plexus Involving The Trunks and Cords: A Case Report

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Karaca Bozdağ Z., Gayretli Ö., Çandır B. N., Arı Z.

Istanbul Yeni Yuzyil Universitesi, Yeni Yuzyil Journal of Medical Sciences, cilt.3, sa.3, ss.195-198, 2022 (Hakemli Dergi)

Özet

Abstract

Anatomical variations of the brachial plexus are common. This

study presents a case of brachial plexus detected during a cadaver

dissection. During routine dissections at the Department of

Anatomy, Faculty of Medicine, Istanbul Yeni Yüzyıl University,

a variation in the formation and distribution of the left brachial

plexus was found in a 74-year-old female cadaver. In this case,

the roots of the C5 and C6 spinal nerves fuse to form the superior

trunk. However C7, C8 and T1 spinal nerve roots formed a

single common trunk instead of the middle and inferior trunk.

The anterior branches of these two trunks formed a single lateral

cord. The medial cord is located lateral to the axillary artery in

the same extremity. The brachial plexus formation on the right

is in the classical pattern. Knowing the variations in brachial

plexus formation and distribution is guiding and important in

clinical practice.

Keywords: Brachial plexus, trunks, cords, axillary artery, anatomic

variations