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: Pathology
[{'content': 'Syphilitic aneurysm mostly involve ? \nSelect and explain. \nA. Arch of aoa, B. Descending aoa, C. Abdominal aoa above the renal aeries, D. None', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. is NoneSyphilitic Aneurism o Also known as leuetic aneurysm.o This is due to obliterative endaeritis that involves vaso vasorum of aoa in the teiary stage of syphilis. o It usually affects the proximal ascending aoa, paicularly the aoic ring.Syphilitic aoitis may occasionaly involve the aoic arch or descending aoa.o Contraction of fibrous scar with in the vessel wall may lead to wrinkling of the intervening segments of arotic intima Tree - barking.o There is characteristic linear calcification of the ascending aoa.o Aoic valve insufficiency results in cardiac hyperophy and the name given to such hea is COR bovinum/Cow hea because of increased size of hea.', 'role': 'assistant'}]