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Fig. 2D Sonography and radiography of medial aspect of elbow in
12-year-old male baseball player. No player was symptomatic at time of
sonographic examination. Sonogram (C) and corresponding diagram
(D) show medial aspect of elbow on nonthrowing side. Asterisk indicates
medial epicondyle; large arrow, growth plate between humeral medial epicondyle
and trochlea; small arrows, humeral trochlea; and arrowheads, ulnar collateral
ligament.