Parsonage-Turner Syndrome: A Case Report on Patient Presentation and Differential Diagnosis

Abstract

BACKGROUND: Parsonage-Turner Syndrome (PTS) is a rare brachial neuritis of sudden onset resulting in constant, severe shoulder girdle pain followed by weakness and sensory deficits. The complex presentation often results in delayed diagnosis or misdiagnosis. This case report provides insight into a comprehensive approach to diagnosing PTS. CASE PRESENTATION: A 50-year-old man began experiencing severe left shoulder pain 48 hours before seeking medical treatment. OUTCOME & FOLLOW-UP: The lack of conclusive findings during the physical therapy evaluation prompted an MRI that revealed PTS. The patient reported full resolution of symptoms within 12 months. DISCUSSION: Severe pain, neurological weakness, and sensory changes led to the initial suspicion of a rotator cuff tear and brachial plexus injury, and an MRI was recommended. This case study adds to the body of evidence emphasizing the importance of differential diagnosis in patients with neuromusculoskeletal involvement.