The bow and arrow sign is an endoscopic sign for determining the location of the ileocecal valve during colonoscopy. Identifying the ileocecal valve in a colonoscopy is important, as it indicates that the entire colon has been visualized. The identifiable landmarks in the cecum are the appendiceal orifice—which is a curvilinear indent indicating the location of the appendix from the lumen of the bowel—and the ileocecal valve, which appears as a puckering in the most distal fold of the cecum.
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