The quadrilateral space is a anatomical description of a four sided shape where the shoulder meets the body. It is formed by the teres minor, teres major, part of the triceps, and the humerus.

Rupture of the circumflex artery and nerve, without fracture or dislocation, is a rare traumatic event. Such a case is reported in a champion flat jockey who sustained blunt trauma to the shoulder ...

The axillary nerve is the most frequently injured nerve in proximal humerus fractures. This nerve traverses the quadrangular space along with the posterior humeral circumflex artery before ...

Careful radiographic evaluation of patients with proximal humeral fractures is critical to accurate diagnosis and successful treatment. Anteroposterior (AP) and axillary views are mandatory.