Figure 4

Ultrasonography of the elbow (A) without gravity stress (shoulder at 60° of external rotation) and (B) under gravity stress. (C) Sketch and (D) ultrasonogram (region encompassed by dotted box in C) of the medial elbow. Arrow, Anterior bundle of the ulnar collateral ligament; H, humerus; U, ulna; J, joint space (dotted line).