Cubital Tunnel Release in a Patient With Parsonage-Turner Syndrome: A Case Report.

Parsonage-Turner syndrome (PTS) is a rare peripheral neuropathy characterized by the sudden onset of shoulder pain followed by muscle weakness and atrophy. This condition primarily affects the brachial plexus and may mimic or coexist with other compressive neuropathies. We present a case of a 39-year-old female with a prior diagnosis of PTS who developed progressive right-sided scapular and elbow pain, accompanied by numbness in the fourth and fifth digits of the right hand. Her symptoms had been ongoing for approximately three months. Physical examination revealed atrophy of the intrinsic muscles of the right hand, a resting claw deformity, and positive Wartenberg and Tinel's signs at the elbow. Electromyography (EMG) was consistent with C8-T1 brachial plexopathy and ulnar nerve entrapment. Given the persistence of symptoms despite conservative treatment, surgical decompression via cubital tunnel release and anterior subcutaneous ulnar nerve transposition was performed. This case illustrates the rare overlap of PTS and ulnar nerve compression, suggestive of double crush syndrome. It underscores the importance of maintaining a high index of suspicion for superimposed compressive neuropathies in patients with PTS who present with focal neurological deficits.