Fig. 4. Posterolateral view of the left proximal forearm in pronation. (A) The anconeus is a right angle triangular muscle attaching proximally to the LE of the humerus with common extensor group. The anconeus muscle is observed to have a sharp, tendinous expansion. (B) The overlying anconeus muscle has been incisied obliquely along the middle segment and extended till the distal segment. (C) The anconeus muscle retracted laterally, the LUCL is identified the window of the anconeus muscle approach exposes the posterior lateral articular capsule of the elbow joint. Cap, capitulum of the humerus; LE, lateral epicondyle; LUCL, lateral ulnar collateral ligament.
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