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polyps

Wednesday 17 November 2004

polyp. Adj. polypous, polypoid

WKP

Definition: A polyp is an abnormal growth of tissue projecting from a mucous membrane.

If it is attached to the surface by a narrow elongated stalk, it is said to be pedunculated. If no stalk is present, it is said to be sessile.

Polyps are commonly found in the colon, stomach, nose, ear, sinus(es), urinary bladder, and uterus.

They may also occur elsewhere in the body where mucous membranes exist like the cervix, vocal folds, and small intestine.

Some polyps are tumors (neoplasms) and others are non-neoplastic (for example, hyperplastic or dysplastic).

The neoplastic ones are generally benign, although some can be premalignant and/or concurrent with a malignancy.

Types

- fibroepithelial polyps
- inflammatory polyp / inflammatory pseudopolyp
- inflammatory fibroid polyp

- adenomatous polyps
- hamartomatous polyps

  • juvenile polyp
  • Peutz-Jeghers polyp

- benign fibroblastic polyp
- digestive stromal polyp
- tumoral polyp

Localization

- nasal polyps

- digestive polyps

- uterine polyps

See also

- pseudopolyp
- polyposis

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