Crossword clues for hyperplasia
hyperplasia
The Collaborative International Dictionary
Hyperplasia \Hy`per*pla"si*a\, n. [NL., fr. Gr. "ype`r over + ? conformation, fr. ? to mold.] (Med. & Biol.) An increase in, or excessive growth of, the normal elements of any part.
Note: Hyperplasia relates to the formation of new elements,
hypertrophy being an increase in bulk of preexisting
normal elements.
--Dunglison.
Douglas Harper's Etymology Dictionary
1861, from Modern Latin hyperplasia, from hyper- + -plasia.
Wiktionary
n. (context medicine English) An increase in the size of a tissue or organ due to increased number of cells.
WordNet
n. abnormal increase in number of cells
Wikipedia
Hyperplasia (from ancient Greek ὑπέρ huper, "over" + πλάσις plasis, "formation"), or hypergenesis, is an increase in the amount of organic tissue that results from cell proliferation. It may lead to the gross enlargement of an organ and the term is sometimes confused with benign neoplasia or benign tumor.
Hyperplasia is a common preneoplastic response to stimulus. Microscopically, cells resemble normal cells but are increased in numbers. Sometimes cells may also be increased in size ( hypertrophy). Hyperplasia is different from hypertrophy in that the adaptive cell change in hypertrophy is an increase in the size of cells, whereas hyperplasia involves an increase in the number of cells.
Usage examples of "hyperplasia".
The British pathologist, Sir Gordon Roy Cameron, who conducted one of these endeavors, a fellow of the Royal College of Pathologists, later knighted for his contributions to the field, observed that the 1947 study had employed formalin as a fixative agent for the tissues, which is not suitable for cytological studies on account of its tendency to produce artifacts of precisely the kind that had been identified as hyperplasia nodules.
Microscopically the enlargement would seem to be due rather to hyperplasia than to hypertrophy.
In ainhum there is, first, simple hypertrophy, then active hyperplasia The papillae degenerate when deprived of blood supply, and become horny.