This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anatomy
Not a feature of Quadrangular space syndrome 
Select and explain. 
A. Hypertrophy of quadrangular space syndrome, B. Weakness of abduction of the arm, C. Weakness of lateral rotation of the arm, D. Weakness of medial rotation of the arm
D: Weakness of medial rotation of the arm
Answer: D: Weakness of medial rotation of the arm 
Explanation: 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.