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open access eISSN 2093-3673

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Case Report

Anat Cell Biol 2023; 56(4): 570-574

Published online December 31, 2023


Copyright © Korean Association of ANATOMISTS.

Uncommon configuration of intercostobrachial nerves, lateral roots, and absent medial cutaneous nerve of arm in a cadaveric study

Rosemol Xaviour

Department of Anatomy, Govt. Medical College, Thrissur, Thrissur, India

Correspondence to:Rosemol Xaviour
Department of Anatomy, Govt. Medical College, Thrissur, Thrissur 680004, India
E-mail: rosemolxaviour@gmail.com

Received: May 22, 2023; Revised: July 21, 2023; Accepted: August 8, 2023

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.


The intercostobrachial nerve (ICBN) originates from the second intercostal nerve’s lateral cutaneous branch, while the median nerve (MN) typically arises from the brachial plexus’s lateral and medial roots. The medial cutaneous nerve of the arm, a branch of the medial cord of the brachial plexus, often connects with the ICBN. Variations were observed during the dissection of a 50-year-old male cadaver, including MN having two lateral roots (LR), LR1 and LR2, joining at different levels. Three ICBNs innervated the arm in this case, with the absence of the medial cutaneous nerve of the arm compensated by branches from the medial cutaneous nerve of the forearm. Understanding these anatomical variations is crucial for surgical procedures like brachioplasty, breast augmentation, axillary lymph node dissection, and orthopedic surgery. Surgeons and medical professionals must be aware of these variations to enhance preoperative planning, minimize complications, and improve patient outcomes in these procedures.

Keywords: Median nerve, Brachial plexus, Anatomical variation, Upper limb surgery, Axillary artery

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