<prompt> Postero lateral anconeus triangle is formed by:Head of radius, lateral epicondyle, medial epicondyleHead of radius, lateral epicondyle, olecranonOlecranon, medial epicondyle, neck of radiusNeck of radius, head of radius, lateral epicondyle  <response>: Radial head, lateral epicondyle and tip of olecranon form the triangle over the posterolateral aspect of elbow joint. This space is occupied by the anconeus muscle and so known as anconeus triangle. Ref: Rockwood and Greens Fractures in Adults 6e, Page 990-92. 