These tumors start in the squamous cells that line most of the anal canal and the anal margin. Anal cancer forms when a genetic mutation turns normal, healthy cells into abnormal cells. Rectal cancer is preventable. This content does not have an English version. After treatment rihanna anal pic rectal cancer, a blood test to measure amounts of CEA a substance in the blood that may be increased when cancer is present may be done to see if the cancer has come back.
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Outcome for stage II and III rectal and colon cancer equally good after treatment improvement over three decades. Larson DW expert opinion. Dysplasia in cells of the anus is also called anal intraepithelial neoplasia AIN or anal squamous intraepithelial lesions SILs.
What Is Anal Cancer?
Other risk factors include:. Rectal cancer surgery removes the cancer and lymph nodes, along with a small portion of normal rectum on either side of the tumor. European Journal of Surgical Oncology. Using condoms may reduce, but not get rid of the risk of HPV infection.