Small cell, neuroendocrine tumors, and melanoma of the anus are rare. Limited data exists on incidence and management for these rare tumors. A large, prospective, population-based database was utilized to determine incidence and survival patterns of rare anal neoplasms. Incidence and survival patterns were evaluated with respect to age, sex, race, histology, stage, and therapy. Anal melanoma AM demonstrated lowest survival rate at 2.
Being infected with the human papillomavirus (HPV) can affect the risk of developing anal cancer.
Leiomyoma of the anal canal originating from the internal anal sphincter is an extremely rare clinical entity. Generally, it does not produce any clinical signs unless it is large enough to cause obstruction, discomfort, bleeding or pain. The diagnosis is often made incidentally during rectal examination due to other perianal disease or check-up. Herein we report a case of internal anal sphincter leiomyoma diagnosed unexpectedly during rectal examination in a patient with perianal fistula, and treated successfully with surgical excision.
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Login below, or create an account for free. The anus is the end of the large intestine, below the rectum, through which stool solid waste leaves the body. The anus is formed partly from the outer, skin layers of the body and partly from the intestine. Two ring-like muscles, called sphincter muscles, open and close the anal opening to let stool pass out of the body. Anatomy of the lower digestive system, showing the colon and other organs. The skin around the outside of the anus is called the perianal area. They are also called epidermoid cancers. There are 3 types:. A keratinising cancer has keratin the protein in your hair and nails in the cancer cells. This type of anal cancer starts in the lower part of the anus.