Most common initiating factor in acute appendicitis is:

Ans. (a) Luminal obstructionRef: Sabiston 19th edition, Pages 1279-1282* Most common cause of acute appendicitis -- Obstruction* Most common cause of Obstruction -- Appendicolith (Fecolith) -- 15% can be seen on plain X-ray itself* Others: Lymphoid hyperplasia, vegetable matters, seeds, parasites, neoplasm.