This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Aneurysms and Dissections, Subject name: Pathology
Most common cause of dissecting hematoma - 
Select and explain. 
A. Hypertension, B. DM, C. Trauma, D. Mafan syndrome
A: Hypertension
Answer: A: Hypertension 
Explanation: Ans. is 'a' i.e., Hypertension o More than 90% of dissections occur in men between the age of 40 and 60 with antecedent hypertension.Other causes of dissection.o Marfan syndrome causing cystic medial necrosis (second most common),o Ehlers - Danlos syndrome.o Inflammatory aortitis - Takayasu's disease. Giant cell arteritis,o Coarctation of aorta.o Normal woman during third trimester of pregnancy.3 Congenital bicuspid aortic valve.Also knowo In Aortic dissection blood enters alon the laminar planes of media.