Diagnosis of an ulnar collateral ligament tear using musculoskeletal ultrasound in a collegiate baseball pitcher: a case report.

Objective: To demonstrate a comparative diagnostic approach between magnetic resonance imaging (MRI) and musculoskeletal ultrasound for detecting UCL trauma of the elbow in a collegiate baseball pitcher.

Background: A 19 year-old male baseball pitcher with no previous history of an elbow injury presented with left medial elbow pain after experiencing a popping sensation during a bull pen throwing session. Patient initially demonstrated palpable tenderness directly over the UCL and a positive milking maneuver.