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Colorectal polyp type code N[N]

Identifying and definitional attributes

Metadata item type:Help on this termValue Domain
METeOR identifier:Help on this term308362
Registration status:Help on this termHealth, Standard 29/08/2014
Definition:Help on this termA code set representing the histopathological classification of a colorectal polyp.

Representational attributes

Representation class:Help on this termCode
Data type:Help on this termNumber
Format:Help on this termN[N]
Maximum character length:Help on this term2
Permissible values:Help on this term
1Hyperplastic polyp
2Tubular adenoma
3Tubulovillous adenoma
4Villous adenoma
5Sessile serrated adenoma
6Traditional serrated adenoma
7Adenoma not otherwise classified
88Other - includes other polyp types

Collection and usage attributes

Guide for use:Help on this term

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 polyp

A 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   Carcinoma

A cancer's growth that begins in the lining layer (epithelial cells) of organs.

Relational attributes

Data elements implementing this value domain:Help on this term

Patient—colorectal polyp type, code N[N] Health, Standard 29/08/2014

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