Case Report
Copyright ©The Author(s) 2021. Published by Baishideng Publishing Group Inc. All rights reserved.
World J Clin Cases. Feb 16, 2021; 9(5): 1237-1246
Published online Feb 16, 2021. doi: 10.12998/wjcc.v9.i5.1237
Bilateral musculocutaneous neuropathy: A case report
Ji Won Jung, Yu Chan Park, Jae Young Lee, Jae Hyeon Park, Seong Ho Jang
Ji Won Jung, Yu Chan Park, Jae Young Lee, Department of Rehabilitation Medicine, Hanyang University Hospital, Seoul 04763, South Korea
Jae Hyeon Park, Seong Ho Jang, Department of Rehabilitation Medicine, Hanyang University Guri Hospital, Guri 11923, South Korea
Author contributions: Jung JW reviewed the literature and contributed to manuscript drafting; Park YC reviewed the literature and interviewed the patient; Lee JY and Park JH performed the electrodiagnostic study and contributed to interpretation of imaging and electrodiagnostic studies; Jang SH was responsible for manuscript revision and intellectual content; All authors issued approval for submission of the final version.
Supported by The Data Construction Learning Program for artificial intelligence (20200803-FS4T, Sector 20 Medical and Health AI Data) funded by the National Information Society Agency, Ministry of Science and ICT.
Informed consent statement: Informed written consent was obtained from the patient for publication of this report and any accompanying images.
Conflict-of-interest statement: The authors have no conflicts of interest to declare.
CARE Checklist (2016) statement: The authors have read the CARE Checklist (2016) and the manuscript was prepared and revised according to the CARE Checklist (2016).
Open-Access: This article is an open-access article that was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution NonCommercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: http://creativecommons.org/Licenses/by-nc/4.0/
Corresponding author: Seong Ho Jang, MD, PhD, Professor, Department of Rehabilitation Medicine, Hanyang University Guri Hospital, No. 153 Gyeongchun-ro, Guri 11923, South Korea. systole77@hanmail.net
Received: December 3, 2020
Peer-review started: December 3, 2020
First decision: December 13, 2020
Revised: December 14, 2020
Accepted: December 22, 2020
Article in press: December 22, 2020
Published online: February 16, 2021
Abstract
BACKGROUND

Isolated musculocutaneous nerve injury is a rare condition. Herein, we report the first case of bilateral musculocutaneous neuropathy after vigorous stretching of both upper extremities with normal results of sensory nerve action potential. Clinicians should be aware of this rare condition that can appear bilaterally. In addition, the interpretation of the aberrant electrodiagnostic study results of this case was discussed.

CASE SUMMARY

A 29-year-old male complaining of bilateral forearm tingling and upper extremity weakness visited the outpatient clinic. The symptoms began 6 mo prior, and he visited another hospital before visiting our department. The diagnosis was not made even after cervical spine magnetic resonance imaging, electrodiagnostic study, brain magnetic resonance imaging, and arteriography were conducted. The patient performed unique exercises that stretched the pectoralis minor and coracobrachialis muscles. On the follow-up electrodiagnostic study, abnormal spontaneous activities in the bilateral biceps and brachialis muscles were observed. The patient was diagnosed with bilateral musculocutaneous neuropathy. Steroid pulse therapy was administered for approximately 6 wk. After treatment, his muscle strength returned to the predisease condition.

CONCLUSION

Clinicians should be aware of this condition, have adequate understanding of anatomy, and advise to correct inappropriate exercises.

Keywords: Musculocutaneous nerve, Peripheral neuropathy, Electrodiagnosis, Exercise, Diagnosis, Case report

Core Tip: We report the first case of bilateral musculocutaneous neuropathy after vigorous stretching of both upper extremities with normal results of sensory nerve action potential. We recommend clinicians be aware of this rare condition that can occur bilaterally. In addition, the interpretation of aberrant electrodiagnostic study results of this case is discussed.