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.

Dunglison.

 

© Webster 1913.

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