Orthopnea secondary to brachial plexitis with bilateral diaphragmatic paralysis

• Published in: BMC pulmonary medicine Vol. 24; no. 1; p. 31
• Main Authors: El Labban, Mohamad, Bauer, Philippe R
• Format: Journal Article
• Language: English
• Published: England BioMed Central Ltd 12.01.2024; BioMed Central; BMC
• Subjects: Analysis; Brachial plexopathy; Brachial plexus; Brachial Plexus Neuritis - complications; Brachial Plexus Neuritis - diagnosis; Care and treatment; Chest; Connective tissue; Diagnosis; Diaphragm; Diaphragm - diagnostic imaging; Diaphragmatic paralysis; Dyspnea; Echocardiography; Edema; Electromyography; Heart surgery; Humans; Injuries; Male; Middle Aged; Muscle Weakness; Neck; Orthopnea; Pain; Paralysis; Parsonage-turner syndrome; Phrenic nerve; Pulmonary function test; Pulmonary function tests; Pulmonology; Respiration; Respiratory function; Respiratory Paralysis - diagnosis; Respiratory Paralysis - etiology; Risk factors; Shortness of breath; Surgery; Thorax; Trauma; Turner's syndrome; Ultrasonic imaging; United States; Brachial plexopathy; Diaphragmatic paralysis; Pulmonary function test; Orthopnea; Parsonage-turner syndrome
• ISSN: 1471-2466; 1471-2466
• DOI: 10.1186/s12890-023-02828-3

Diaphragmatic paralysis can present with orthopnea. We report a unique presentation of bilateral diaphragmatic paralysis, an uncommon diagnosis secondary to an unusual cause, brachial plexitis. This report thoroughly describes the patient's presentation, workup, management, and outcome. It also reviews the literature on diaphragmatic paralysis and Parsonage-Turner syndrome. A 50-year-old male patient developed insidious orthopnea associated with left shoulder and neck pain over three months with no associated symptoms. On examination, marked dyspnea was observed when the patient was asked to lie down; breath sounds were present and symmetrical, and the neurological examination was normal. The chest radiograph showed an elevated right hemidiaphragm. Echocardiogram was normal. There was a 63% positional reduction in Forced Vital Capacity and maximal inspiratory and expiratory pressures on pulmonary function testing. The electromyogram was consistent with neuromuscular weakness involving both brachial plexus and diaphragmatic muscle (Parsonage and Turner syndrome). Compared to unilateral, bilateral diaphragmatic paralysis may be more challenging to diagnose. On PFT, reduced maximal respiratory pressures, especially the maximal inspiratory pressure, are suggestive. Parsonage-Turner syndrome is rare, usually with unilateral diaphragmatic paralysis, but bilateral cases have been reported.