[Clinical Picture] Unexpected finding in a 17-year-old female undergoing screening colonoscopy

A 17-year-old female was referred to a gastroenterologist for an elective screening colonoscopy because of a diagnosis of sessile serrated polyposis syndrome in her older brother. He also had severe ileocolonic Crohn's disease, which was diagnosed 14 months previously. The patient was asymptomatic, with no clinically significant medical history and was not taking any medication. Initial colonoscopy revealed multiple flat lesions with altered pit patterns measuring 30–50 mm in diameter located in the caecum, ascending colon, transverse colon, sigmoid colon, and rectum.