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Colorectal (Anal) Cancer. I am a survivor. Life is a journey...this is mine.
Anal cancer arises from the cells around the anal opening (verge) or within the anal canal (1-2 inches long) up to its junction with the rectum. Most anal cancers arise from skin cells and are called squamous cell carcinomas. Some arise from the special mucosal cells lining the upper anal canal and are called cloacogenic carcinomas. Although several other types of cancer may occur in this area, these two are the most common. They behave similarly and are treated in the same fashion. Cells that are becoming malignant but have not invaded below the surface are "pre-cancerous" (carcinoma-in-situ). This condition is called Bowen's disease.
Anal cancer is fairly uncommon. It accounts for about 1-2% of gastrointestinal cancers. About 3,400 new cases of anal cancer are diagnosed each year in the U.S.A., and about 500 people will die of the disease each year. This may be compared to 140,000 new cases of colorectal cancer with 50,000 deaths per year.
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