Local tenderness at the four holes

Physical examination of the quadrilateral foramen showed localized tenderness at the quadrilateral foramen. Quadrilateral space syndrome (quadrilateral space syndrome) is a series of clinical symptoms caused by compression of the posterior brachial artery and axillary nerve at the quadrilateral foramen. The main manifestations are sensory disturbances of the lateral shoulder arm innervated by the axillary nerve and limited deltoid muscle function. May be secondary to shoulder trauma or secondary to upper extremity excessive exercise. In 1980, Cahill first described the quadrangular foramen syndrome. In 1983, Cahill et al reported the clinical manifestations, diagnosis, surgical methods, and good surgical results of 18 cases of border hole syndrome.