A 20-year-old patient pitches for his college baseball team….
A 20-year-old patient pitches for his college baseball team. He reports right elbow pain onset three weeks ago after the start of the baseball season. Physical examination of the elbow shows full range of motion in flexion, extension, supination, and pronation. He reports continuous elbow pain and pain that is present along the radial part of the forearm. He reports a weaker grip. Dorsiflexion of the right hand against resistance elicits localized elbow pain at the outer elbow area. Which of the following is the most likely diagnosis?