Proximal to anus
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If results are given in the number of centimeters (cm) from the anus where the colonoscope located the hyperplastic polyp, assume that any HP found where the colonoscopist says the HP is more than 40 cm in from (above) the anus would be considered above the sigmoid colon (or proximal to the sigmoid). Distal colon .
Parts of Colon and Rectum. Cecum (proximal right colon) 6 x 9 cm pouch covered with peritoneum; Appendix A vermiform (wormlike) diverticulum located in the lower cecum; Ascending colon cm long, located behind the peritoneum; Hepatic flexure.
Lies under right lobe of liver; Transverse colon. Lies anterior in.
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Description:View Media Gallery The pigmented, keratinized perianal skin of the buttocks around the anal verge has skin appendages eg, hair, sweat glands, sebaceous glands ; compare this with the anal canal skin above the anal verge, which is also pigmented and keratinized but does not have skin appendages. The anal canal is completely extraperitoneal. The length of the anal canal is about 4 cm range, cm , with two thirds of this being above the pectinate line also known as the dentate line and one third below the pectinate line. The epithelium of the anal canal between the anal verge below and the pectinate line above is variously described as anal mucosa or anal skin.
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