Which of the following is the most common feature of Aoitis on chest X-ray -

Saccular aneurysm with pencil-thin dystrophic calcification most commonly in ascending aoa commencing near aoic root is characteristic of syphilitc aoitis. Aoic aneurysm in Marfans syndrome often involves sinuses of valsalva and ascending aoa.It can also effect aoic ring resulting in AR. Takayasu aoitis affects segments of aoa including main aoic branches and pulmonary aeries. Ref : sutton 7/ep312-14