from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. An abnormal increase in the number of cells in an organ or a tissue with consequent enlargement.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. An increase in the size of a tissue or organ due to increased number of cells.

from the GNU version of the Collaborative International Dictionary of English

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

from The Century Dictionary and Cyclopedia

  • n. In pathology, overgrowth of a part due to multiplication of its cells; excessive cell-reproduction. Compare hypertrophy, 1.
  • n. In botany, an abnormal increase in the volume of cells, due to their unusual multiplication. Compare hypoplasia.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. abnormal increase in number of cells


from Wiktionary, Creative Commons Attribution/Share-Alike License

hyper- + -plasia


  • After my first biopsy, I was diagnosed with a condition called hyperplasia with atypia, or a pre-pre-cancer.

    Good-Enough Mother

  • Pre-cancerous changes of the endometrium, called hyperplasia.


  • Only one case of inflammation and two cases of a potentially precancerous accumulation of cells known as hyperplasia were noted.

    Science Blog - Science news straight from the source

  • Another great post - I particularly like the discussion of the potential health benefit of adipocyte hyperplasia.

    Dr. Sharma’s Obesity Notes » Blog Archive » Obesity Goes Viral?

  • While his detractors were explaining that “the most striking and consistent endoscopic feature, lymphoid nodular hyperplasia in the terminal ileum, is not unusual in children,” Wakefield was trotting out what had become a standard response of vaccine denialists to accusations of unreliable or inaccurate data: He condemned his critics for caring more about their standing in the scientific community than about sick children.

    The Panic Virus

  • In a study released last year, the incidence of endometrial hyperplasia—a thickening of the uterus lining that in some cases can lead to uterine cancer—was about 0.3% after one year of treatment with Aprela, comparable to the rate among those taking a placebo.

    Pfizer Set to Seek Aprela Nod

  • Gee, Mr. DRxJ, that could be a lump, or an inflammation, or just hyperplasia.

    Think Progress » Florida Doctor Warning Away Obama Voters Admits He Doesn’t Know What He’s Talking About On Health Care

  • MEN2A is diagnosed clinically by the occurrence of two or more endocrine cancers (specifically medullary cancer of the thyroid, pheochromocytoma, and parathyroid adenoma/hyperplasia) in a person or in close relatives (such as a parent or sibling).

    Multiple Endocrine Neoplasia Type 2

  • Rice HE, Flake AW, Hori T, Galy A, Verhoogen RH: Massive thymic hyperplasia: characterization of a rare mediastinal mass.

    CHOP pediatric surgery publications

  • FMTC is diagnosed in families with four or more cases of MTC in the absence of pheochromocytoma or parathyroid adenoma or hyperplasia, and is considered a variant of MEN2A.

    Multiple Endocrine Neoplasia Type 2


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