An increase in the number of cells in a tissue or organ, excluding tumor formation, whereby the bulk of the part or organ is increased.

Hy`per*pla"si*a (?), n. [NL., fr. Gr. over + conformation, fr. to mold.] Med. & Biol.

An increase in, or excessive growth of, the normal elements of any part.

Hyperplasia relates to the formation of new elements, hypertrophy being an increase in bulk of preexisting normal elements.



© Webster 1913.

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