This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Breast, Subject name: Surgery
Superolateral boundary of axillary dissection is: 
Select and explain. 
A. Clavipectoral fascia, B. Brachial plexus, C. Axillary aery, D. Axillary vein
D: Axillary vein
Answer: D: Axillary vein 
Explanation: Axillary Node Clearance Axillary node clearance is defined as clearing of the axillary contents bounded by: Laterally: Axillary skin Posteriorly: Lattisimus dorsi, Teres major and subscapularis Superiorly: Lower border of axillary vein Anteriorly: Pectoralis muscle Medially: Chest wall