NCBI Bookshelf. Brian Jahnny ; John V. Authors Brian Jahnny 1 ; John V. Ashurst 2. An anal fissure is a superficial tear in the skin distal to the dentate line. Anal fissures are common in those with a history of constipation or hard stools, low fiber diet, trauma, and previous anal surgery.
Overview of the Anus and Rectum - Digestive Disorders - MSD Manual Consumer Version
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Overview of the Anus and Rectum
The anus is the opening at the end of the digestive tract where stool leaves the body. The rectum is the section of the digestive tract above the anus where stool is held before it passes out of the body through the anus. The anus is formed partly from the surface layers of the body, including the skin, and partly from the intestine. The rectal lining consists of glistening red tissue containing mucus glands—much like the rest of the intestinal lining.
Establishing the normal ranges of female and male anal canal and rectal wall vascularity with color Doppler anorectal ultrasonography. Sthela M. Graziela Olivia da S. Fernandes a. To evaluate blood supply in the anal canal, rectal wall and mesorectal fat of men and women, using color Doppler endorectal sonography to establish normal ranges for vascular parameters.