This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vascular surgery, Subject name: Surgery
The most common site of acute aoic dissection is 
Select and explain. 
A. Right lateral wall of ascending aoa, B. Arch of aoa, C. Suprarenal abdominal aoa, D. Infrarenal abdominal aoa
A: Right lateral wall of ascending aoa
Answer: A: Right lateral wall of ascending aoa 
Explanation: This occurs when a defect or flap occurs in the intima of the aoa, resulting in blood tracking into the aoic tissues splitting the medial layer and creating a false lumen. It most commonly occurs in the ascending aoa or, less often, just distal to left subclan ae. Reference: Bailey and love, 27th edition, page no. 909