Musculocutaneous Neuropathy Research Articles

Isolated Musculocutaneous Neuropathy In A College Baseball Pitcher

Isolated Musculocutaneous Neuropathy In A College Baseball Pitcher

Brachial Plexus Injury and Musculocutaneous Nerve Palsy During Prone Positioning in a Patient With COVID-19

Prone positioning is crucial in the respiratory management of patients with acute respiratory distress syndrome (ARDS) and reduces mortality. However, this may be complicated by compression-related peripheral nerve injury. We report the case of a male in his 80s with obesity admitted to the intensive care unit (ICU) with COVID-19 pneumonia who developed brachial plexus disorder in the right upper extremity and musculocutaneous neuropathy in the left. The patient’s cough, dyspnea, and fatigue did not improve; therefore, he was intubated and placed in the prone position for one week. The patient complained of bilateral upper limb weakness on regaining consciousness. We diagnosed left musculocutaneous nerve palsy and right brachial plexus palsy based on physical findings and needle electromyography (EMG). Physical therapy was initiated, including joint range-of-motion exercises focused on preventing contractures in the extremities and active assistive exercises. Motor impairment improved, and the patient was discharged from the rehabilitation center.

Musculocutaneous and Median Neuropathy after MiraDryⓇ Procedure for Axillary Hyperhidrosis

Musculocutaneous and Median Neuropathy after MiraDry^Ⓡ Procedure for Axillary Hyperhidrosis

Indirect traumatic musculocutaneous nerve injury confused with static line injury: A case report

The musculocutaneous nerve is rarely injured because it is short and is located deep in the shoulder and arm. Damage is usually caused by direct injuries, including stabbing, explosion, and surgery in a war setting. Although indirect injury of the musculocutaneous nerve is extremely rare, it occurs in various situations. In military parachuting-related activities, musculoskeletal injury occurs most commonly, and static line injury is known as rupture of the biceps brachii tendon. However, musculocutaneous neuropathy can also result from secondary injury by the static line. The musculocutaneous nerve goes together with the biceps brachii muscle, and the musculocutaneous nerve could overstretch and compress within the coracobrachialis muscle where the nerve is relatively fixed due to the overloading of the upper arm with shoulder extension. This report focuses on the indirect musculocutaneous nerve injury with axonotmesis following an overloading event by the static line during military parachuting. In this case, some physicians may confuse nerve injury with static line injury, leading to delays in the diagnosis of neuropathy. If the biceps brachii muscle is damaged due to trauma, checking for the accompanying musculocutaneous nerve injury is necessary.

The Effectiveness of Ultrasonography in the Diagnosis of Spontaneous Hourglasslike Constriction of Peripheral Nerve in the Upper Extremity

To investigate the ultrasonographic characteristics in hourglasslike constriction of peripheral nerve in the upper extremity and to evaluate the value of ultrasonography in the diagnosis. Nineteen patients with hourglasslike constriction of peripheral nerve in the upper extremity underwent ultrasonography and the results were compared with surgery. The ultrasonographic characteristics, the accurate rate, and the relation between the ultrasonography and surgery were analyzed. There were 22 affected nerves involved in 19 patients, including 17 radial neuropathies, 4 median neuropathies, and 1 musculocutaneous neuropathy. The accuracy rate of ultrasonography in diagnosing hourglasslike constriction of upper limb nerve was 87.93%. Ultrasonography showed that the constriction sites were completely consistent with the operation. The ultrasonography characteristics of hourglasslike constriction of upper limb nerves were hourglasslike nerve incompleteness or complete constriction, and the nerves at both ends were thickened, and no compression structure was seen around. All lesions with complete constriction diagnosed by ultrasonography were treated with resection of the lesion with or without graft. In addition, 71.43% with incomplete constriction were treated with neurolysis, and 28.57% with resection of the lesion with direct repair. Ultrasonography could be used as a routine noninvasive examination for hourglasslike constriction of upper limb nerves. Ultrasonography suggests that resection of the lesion rather than neurolysis should be considered in the treatment of complete constriction. For patients with clinical symptoms, ultrasonography showed local nerve enlargement but no constriction; clinicians should be prompted to explore carefully during operation to avoid missing nerve hourglasslike constriction.

Musculocutaneous neuropathy.

Isolated musculocutaneous neuropathy is uncommon. In this study we aimed to determine its causes and clinical presentation and interpret the electrodiagnostic findings associated with this condition. Our investigation was a retrospective review of patients diagnosed with musculocutaneous neuropathy at the Mayo Clinic (Rochester, Minnesota) electromyography (EMG) laboratory between 1997 and 2015. Thirty-two patients with musculocutaneous neuropathy and 5 patients with lateral antebrachial cutaneous neuropathy were identified. The most common cause was acute trauma or surgery (65%). Fourteen percent of the cases were idiopathic and 14% were inflammatory. Pain and sensory disturbance were more common presentations than weakness. Weakness from nerve injury was not noted in 2 patients, suggesting that other muscles may provide adequate elbow flexion/supination. The bilateral absence of lateral antebrachial cutaneous nerve sensory responses suggests an inflammatory cause. Musculocutaneous neuropathy usually results from trauma or iatrogenic injury. Nerve conduction studies alone are insufficient to confirm neuropathy, and needle EMG examination should be a routine part of the diagnostic evaluation. Muscle Nerve 58: 726-729, 2018.

Poster 218: Musculocutaneous Neuropathy Due to PICC Line Insertion: A Case Report

Poster 218: Musculocutaneous Neuropathy Due to PICC Line Insertion: A Case Report

Musculocutaneous Neuropathy Following Insertion of Cosmetic Silicone Biceps Implants: A Case Report

This is a case report of a 40-year-old man who underwent bilateral cosmetic biceps implantation, developed pain, and had the implants removed. He then developed weakness and numbness in the left arm and was subsequently found to have musculocutaneous neuropathy by electromyography and ultrasound. After failing to respond to conservative care and having ongoing weakness, the patient underwent a neurolysis and debridement of the musculocutaneous nerve. Subsequently, he regained full function and use of the left upper limb. This case report brings attention to musculocutaneous neuropathy as a potential complication of cosmetic bicipital implantation surgery.

Musculocutaneous neuropathy after anaesthesia for thyroid surgery: a case report

Postoperative isolated injury of the musculocutaneous nerve is a rare disorder and complication. Reported cases are claimed to present with loss of biceps and brachialis power without neuropathic pain. When injury occurs to one of the terminal branches of the brachial plexus, the lateral cutaneous nerve of the forearm, pain is the major symptom and it typically radiates along the radial aspect of the forearm. In the literature, isolated lesions of the musculocutaneous nerve have been attributed to repeated microtrauma, indirect trauma or direct trauma to the nerve. It may also occur due to strenuous extension of the forearm for prolonged periods.

High-resolution 3-Tesla magnetic resonance neurography of musculocutaneous neuropathy

High-resolution 3-Tesla magnetic resonance neurography of musculocutaneous neuropathy

Isolated Musculocutaneous Neuropathy in an Adolescent Baseball Pitcher

Injury of the musculocutaneous nerve very rarely occurs in the absence of concomitant injury to other components of the brachial plexus. Until now, the few cases of isolated musculocutaneous nerve palsies have been reported only in adults. We report a case of isolated musculocutaneous neuropathy in a uniquely talented adolescent baseball pitcher. The biomechanics underlying this adolescent's ability to throw with high velocity likely contributed to the musculocutaneous nerve injury in this case.

A Variation of Musculocutaneous Neuropathy: Implications for Electromyographers

A Variation of Musculocutaneous Neuropathy: Implications for Electromyographers

Musculocutaneous Neuropathy: Case Report and Discussion

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 1day 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.

P204 Predictive value of electrophysiology in idiopathic peripheral facial paralysis

P204 Predictive value of electrophysiology in idiopathic peripheral facial paralysis

P206 Isolated traumatic musculocutaneous distal branch neuropathy

Ad dress for Cor res pon den ce/Ya z›fl ma Ad re si: Nazli Gamze Bulbul MD, Katip Celebi University Faculty of Medicine, Ataturk Training and Research Hospital, Clinic of Neurology, Izmir, Turkey Phone: +90 232 244 44 44 E-mail: nzl.gmzb@gmail.com Re cei ved/Ge lifl Ta ri hi: 06.12.2014 Ac cep ted/Ka bul Ta ri hi: 17.08.2015 Isolated musculocutaneous neuropathy is frequently associated with superior truncus lesions of brachial plexus and appears rarely. Musculocutaneous nerve palsy may occur in two patterns: proximal and distal injury. Proximal injury may cause motor and sensory deficits, but distal injury primarily causes sensory deficits. In our patient, neurologic symptoms were insignificant and electrophysiologic methods were very helpful for locating the lesion. Herein, we report a case of isolated distal branch musculocutaneous nerve injury with very occult clinical symptoms that resulted from a surgical procedure.

P15.12 Musculocutaneous neuropathy with isolated wasting of the brachialis muscle in a weight-lifting young man

P15.12 Musculocutaneous neuropathy with isolated wasting of the brachialis muscle in a weight-lifting young man

Isolated musculocutaneous neuropathy caused by a proximal humeral exostosis

We report an isolated musculocutaneous neuropathy caused by a proximal humeral osteochondroma that became symptomatic after the patient played recreational basketball. Lesion resection resulted in complete deficit resolution. Mass lesions involving the musculocutaneous nerve should be considered in patients with atraumatic, isolated musculocutaneous neuropathies that are recurrent or fail to recover, even in the setting of strenuous exercise.