What is anal dysplasia?

What is anal dysplasia?

Dysplasia refers to any kind of abnormal changes in the cells of the body. Anal dysplasia, anal intraepithelial neoplasia (AIN) and anal squamous intraepithelial lesion (SIL) are terms used to describe conditions that occur before the onset of anal squamous cell cancer (SCC). As shown in Figure 1, the anus is located at the end of the intestinal tract. The anus is the part of the rectum that allows stool to pass outside of the body.