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Colonoscopy images show a large amount of fecal residue in the intestinal lumen, which was dilated (dominated by the dilation of the ascending colon, hepatic region, and transverse colon), and a smooth mucosa. No obvious structural abnormalities were found. A: Ileocecum; B: Ascending colon proximal to the liver; C: Transverse colon proximal to the liver; D: Descending colon; E: Sigmoid colon; F: Rectum.
