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Fig. 1B. —25-year-old male left-handed pitcher with multiple heterotopic calcifications in ulnar collateral ligament. Frontal radiograph (A) and coronal gradient MR image (TR/TE, 450/12; flip angle, 20°) obtained with intraarticular contrast material (B) of left elbow reveal heterotopic calcifications in intact ulnar collateral ligament (arrowhead, B). No tear of ulnar collateral ligament was identified at surgery. Note hypertrophic spurring of medial compartment.