This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Pathology
Most common cause of dissecting hematoma is 
Select and explain. 
A. Hypeension, B. Marfan's syndrome, C. Iatrogenic, D. Kawasaki
A: Hypeension
Answer: A: Hypeension 
Explanation: Aoic dissection occurs when blood splays apa the laminar planes of the media to form a blood-filled channel within the aoic wall.Aoic dissection occurs mainly in two age groups: (1)men aged 40 to 60 with antecedent hypeension (more than 90% of cases); and (2) younger patients with connective tissue abnormalities that affect the aoa.Robbins Basic pathology, 9th edition, pg no.346