A puzzling case presenting as a polypoid mass in the cecum in an adult patient: Appendiceal intussusception

Appendiceal intussusception is a rare condition in an adult patient and may not be initially considered in the differential diagnosis clinically or radiologically. It occurs due to an organic cause or idiopathically. We report a 74-year-old patient who had a polypoid lesion in the cecum on colonoscopy with no radiologic imaging and was ultimately diagnosed grossly and histopathologically as appendiceal intussusception. In conclusion, physicians are advised to consider appendiceal intussusception as an alternative diagnosis in all patients presenting with a suspected cecal mass.