A 51-year-old anesthesiologist complains of intermittent numbness or tingling in the ring and small fingers of his nondominant hand for 1 year with occasional medial elbow pain that radiates to the ulnar side of the hand. The symptoms are worse with activity and have gradually increased in frequency and severity, and in the last 3 months became nocturnal and now constant. He has no history of upper extremity injury and has no systemic disease. Examination shows tenderness in the retro-condylar groove without ulnar nerve instability and decreased light touch in the ulnar 2 digits along with weakness of the ulnar innervated intrinsic muscles without atrophy.
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