Colorectal polyp type code N[N]
Identifying and definitional attributes
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|Definition:||A code set representing the histopathological classification of a colorectal polyp.|
Collection and usage attributes
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An adenoma is a benign tumour that arises from epithelial cells that line the inside surface of an organ. All adenomas have malignant potential. Adenomas have several different growth patterns.
CODE 1 Hyperplastic polypA type of polyp that has a low risk, if any, of developing into a cancer. However, people with multiple hyperplastic polyps are associated with an increased risk of bowel cancer.
CODE 2 Tubular adenoma
Tubular adenoma composed of epithelial tissue resembling a tubular gland. This is most of the most common growth patterns. Most adenomas that are small have a tubular growth pattern.
CODE 3 Tubulovillous adenoma
Many adenomas have a mixture of both growth patterns. Tubulovillous adenomas are neoplams that resemble a mixture of both tubular and villous adenoma growth patterns.
CODE 4 Villous adenoma
Villous adenomas are composed of mucinous epithelium covering delicate vascular projections. Larger adenomas may have a villous growth pattern. Larger adenomas more often have cancers developing in them. Adenomas with a villous growth pattern are also more likely to have cancers develop in them.
CODE 5 Sessile serrated adenoma
Sessile serrated polyps have a saw tooth appearance under the microscope, and tend to grow as slightly flattened, broad-based polyps.
CODE 6 Traditional serrated adenoma
Traditional serrated adenomas have a saw tooth appearance under the microscope.
CODE 7 Adenoma not otherwise classified
A benign growth that does not fit the classification listed above.
CODE 8 CarcinomaA cancer's growth that begins in the lining layer (epithelial cells) of organs.
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