![]() Most adenomas that are small (less than ½ inch) have a tubular growth pattern. Many adenomas have a mixture of both growth patterns, and are called tubulovillous adenomas. There are 2 major growth patterns: tubular and villous. What are tubular adenomas, tubulovillous adenomas, and villous adenomas?Īdenomas can have several different growth patterns that can be seen under the microscope by the pathologist. In some cases, a cancer can start in the adenoma. What is an adenoma (adenomatous polyp)?Īn adenoma is a polyp made up of tissue that looks much like the normal lining of your colon, although it is different in several important ways when it is looked at under the microscope. These polyps can be thought of as pre-cancers, which is why it is important to have them removed. Polyps are benign (non-cancerous) growths, but cancer can start in some types of polyps. Different types of polyps look different under the microscope. ![]() What is a polyp in the colon?Ī polyp is a projection (growth) of tissue from the inner lining of the colon into the lumen (hollow center) of the colon. The colon ends at the rectum, where waste is stored until it exits through the anus. The ascending colon, transverse colon, descending colon, and sigmoid colon are other parts of the colon after the cecum. The cecum is the beginning of the colon, where the small intestine empties into the large intestine. These are all parts of the large intestine. What if my report mentions the cecum, ascending colon, transverse colon, descending colon, sigmoid colon, or rectum? The questions and answers that follow are meant to help you understand the medical language used in the pathology report you received for your biopsy. The pathologist sends your doctor a report that gives a diagnosis for each sample taken. When your colon was biopsied, the samples taken were studied under the microscope by a specialized doctor with many years of training called a pathologist.
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