Colorectal
Colorectal cancer is cancer that occurs in the colon or rectum. The majority of colorectal cancers begin as a growth on the inner lining of the colon or rectum, which are termed polyps. There are various types of polyps.
Adenomatous polyps (adenomas) are polyps that sometimes develop into cancer. Henceforth, adenomas are categorized as a pre-cancerous condition. The three subtypes of adenomas are tubular, villous and tubulovillous. Next are hyperplastic polyps and inflammatory polyps, which are more common, but in general they are not pre-cancerous.
Although some individuals with large hyperplastic polyps may require more frequent colorectal cancer screening with colonoscopy. Lastly, there are sessile serrated polyps (SSP) and traditional serrated adenomas (TSA), which are often treated like adenomas because they correlate with a higher risk of colorectal cancer.
Most colorectal cancers are adenocarcinomas. Other types are less common colorectal cancer subtypes are carcinoid tumors, gastrointestinal stromal tumors (GISTs), lymphomas and sarcomas.
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