Unilateral diaphragmatic paralysis is often discovered incidentally on a chest radiograph and is an underreported cause of dyspnea on exertion. The common causes of diaphragmatic paralysis seen in clinical practice are phrenic nerve injury following blunt neck trauma or surgery, viral infections (e.g., herpes zoster, poliomyelitis), cervical spondylosis, and cervical or mediastinal compressive tumors. Herein, we describe a case of a middle-aged male who presented with breathlessness on exertion, preceded by a history of acute right-sided shoulder, and neck pain. On examination, there were reduced movements of the right hemithorax, and his chest radiograph showed an elevated right hemidiaphragm. On detailed evaluation and based on his clinicoradiological profile along with nerve conduction studies, he was diagnosed as a case of unilateral paralysis of the right hemidiaphragm secondary to neuralgic amyotrophy. Diaphragmatic dysfunction in the form of weakness or paralysis can be a rare consequence of neuralgic amyotrophy. The clinical outcome of neuralgic amyotrophy with phrenic nerve palsy leading to diaphragmatic paralysis is variable, and many patients may show slow spontaneous recovery.

单侧膈肌麻痹通常是在胸片上偶然发现的，是劳力性呼吸困难的一个未被充分报道的原因。临床实践中膈肌麻痹的常见原因是颈部钝伤或手术后膈神经损伤、病毒感染（例如带状疱疹、脊髓灰质炎）、颈椎病以及颈椎或纵隔压迫性肿瘤。在此，我们描述了一名中年男性的病例，他在用力时出现呼吸困难，之前有急性右侧肩部和颈部疼痛的病史。检查时，右半胸运动减少，胸片显示右半膈升高。经过详细评估，根据他的临床放射学特征和神经传导研究，他被诊断为继发于神经痛性肌萎缩的右侧膈肌单侧麻痹。无力或瘫痪形式的膈肌功能障碍可能是神经痛性肌萎缩症的罕见后果。神经痛性肌萎缩伴膈神经麻痹导致膈肌麻痹的临床结果各不相同，许多患者可能表现出缓慢的自然恢复。