benign neoplasm

benign neoplasm

Etymology: L, benignare + Gk, neos, new, plasma, formation

a localized tumor that has a fibrous capsule, limited potential for growth, a regular shape, and cells that are well differentiated. A benign neoplasm does not invade surrounding tissue or metastasize to distant sites. Some kinds of benign neoplasms are adenoma, fibroma, hemangioma, and lipoma. Also called benign tumor. Compare malignant neoplasm.

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neoplasm

1. a tumor.

2. any new and abnormal growth, specifically one in which cell multiplication is uncontrolled and progressive. Neoplasms may be benign or malignant. Neoplasms of particular organs and of particular cell types are to be found under their individual headings, e.g. pharyngeal, adenocarcinoma.

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benign neoplasm

a neoplasm having none of the characteristics of a malignant neoplasm (see below), i.e. it grows slowly, expands without metastasis, and usually does not recur.

neoplasm fever

due to extensive necrosis in rapidly growing tumors.

histoid neoplasm

a neoplasm whose cells and organization resemble those of the tissue from which it is growing.

malignant neoplasm

a neoplasm with the characteristics of anaplasia, invasiveness and metastasis.

organoid neoplasm

a neoplasm whose cellular architecture resembles that of some organ in the body.

transmissible neoplasm

a neoplasm capable of being transmitted between individuals. Includes bovine viral leukosis, avian leukosis, rous sarcoma complex, marek's disease, canine transmissible venereal tumor, squamous cell carcinoma of cattle, and canine viral papillomatosis.