Musculocutaneous Neuropathy: Case Report and Discussion

Diana Besleaga, BS
SUNY Downstate Medical Center


Vincenzo Castellano, MD

Assistant Attending Physiatrist, Hospital for Special Surgery
Assistant Professor of Rehabilitation Medicine, Weill Cornell Medical College
Medical Director, Integrative Care Center

Christopher Lutz, MD

Assistant Attending Physiatrist, Hospital for Special Surgery

Joseph H. Feinberg, MD

Physiatrist-in-Chief, Hospital for Special Surgery
Co-Medical Director, Center for Brachial Plexus and Traumatic Nerve Injury
Associate Professor of Rehabilitation Medicine, Weill Cornell Medical College

Abstract

The musculocutaneous nerve arises from the lateral cord of the brachial plexus and contains fibers from the C5, C6, and C7 spinal nerve roots. It innervates such muscles as the biceps brachii and brachialis as well as supply branches to the skin over the lateral cubital and forearm regions via the lateral antebrachial cutaneous nerve. Musculocutaneous neuropathy can arise from exercise, participating in sports, strenuous activity, cast placement, trauma, and surgery in addition to other less understood causes such as Parsonage Turner syndrome. We present the case of a 55-year-old female who complained of numbness, weakness, and pain throughout the arm starting 1 day following a surgical procedure. Electrodiagnostic testing revealed a musculocutaneous neuropathy with significant axonal injury. Symptoms of musculocutaneous neuropathy may be similar to cervical spinal nerve root impingement or brachial plexus lesions. Therefore, magnetic resonance imaging and electrodiagnostic studies may be useful in differentiating between these conditions. Once the diagnosis of musculocutaneous neuropathy has been made, treatments include relative rest, nonsteroidal anti-inflammatory drugs, splinting, physical therapy, and surgical decompression in cases that do not respond to conservative management.

This article appears in HSS Journal: Volume 6, Number 1.
View the full article at springerlink.com.

About the HSS Journal

HSS Journal, an academic peer-reviewed journal, is published twice a year, February and September, and features articles by internal faculty and HSS alumni that present current research and clinical work in the field of musculoskeletal medicine performed at HSS, including research articles, surgical procedures, and case reports.

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