<prompt> Not a feature of Quadrangular space syndromeHypertrophy of quadrangular space syndromeWeakness of abduction of the armWeakness of lateral rotation of the armWeakness of medial rotation of the arm  <response>: Quadrangular space syndrome Hypertrophy of the quadrangular space muscles or fibrosis of the muscle edges may impinge on the axillary nerve. Uncommonly this produces waekness of the deltoid muscle. Typically it produces atrophy of the teres minor muscle. Which may affect the control that the rotator cuff muscles exert on shoulder movement. 