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Fig. 3A. —19-year-old male right-handed pitcher with heterotopic calcification and partial tear of ulnar collateral ligament. Frontal radiograph (A) and coronal gradient-echo MR image (TR/TE, 450/12; flip angle, 20°) obtained with intraarticular contrast material (B) of right elbow reveal 5 x 2 mm proximal heterotopic calcification of ulnar collateral ligament (arrowhead). Note partial tear of ulnar collateral ligament. Contrast material extends inferiorly adjacent to proximal ulna (arrow, B) and beyond distal attachment of ulnar collateral ligament without extravasation. Partial tear of ulnar collateral ligament was confirmed at surgery.