Which of the following complications is thought to be the most common cause of appendicitis?

A fecalith

A fecalith is a fecal calculus. or stone. that occludes the lumen of the appendix and is the most common cause of appendicitis. Bowel wall swelling. kinking of the appendix. and external occlusion. not internal occlusion. of the bowel by adhesions can also be causes of appendicitis.