Topic: neoplasm

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neoplasm

The Columbia Encyclopedia, Sixth Edition
neoplasm or tumor, tissue composed of cells that grow in an abnormal way. Normal tissue is growth-limited, i.e., cell reproduction is equal to cell death. Feedback controls limit cell division after a certain number of cells have developed, allowing for tissue repair but not expansion. Tumor cells are less responsive to these restraints and can proliferate to the point where they disrupt tissue architecture, distort the flow of nutrients, and otherwise do damage. Tumors may be benign or malignant. Benign tumors remain localized as a discrete mass. They may differ appreciably from normal... Read more
neoplasm
The Oxford Pocket Dictionary of Current English

ne·o·plasm / ˈnēəˌplazəm / • n. a new and abnormal growth of tissue in some part of the body, esp. as a characteristic of cancer.

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tumour
Britannica Concise Encyclopedia

[or neoplasm ] Mass of abnormal tissue that arises from normal cells, has no useful function, and tends to grow. Cell abnormalities may include increased size or number or loss of characteristics that differentiate their tissue of origin. Cells in malignant tumours ( cancer ) have a distorted size, ...

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"neoplasm" on Wikipedia

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