Pathologic Function
hyperplasia Audio
hy·per·pla·sia [ hy-per-play-zhuh ]
Subclass of:
Pathologic Processes
Etymology:
Greek hyper = excessive + plasis = formation
Definitions related to hyperplasia:
  • Abnormal multiplication of otherwise normal cells, leading to tissue enlargement.
    CRISP Thesaurus
    National Institutes of Health, 2006
  • An abnormal increase in the number of cells in an organ or a tissue with consequent enlargement.
    NCI
    U.S. National Cancer Institute, 2021
  • An increase in the number of cells in a tissue or organ without tumor formation. It differs from HYPERTROPHY, which is an increase in bulk without an increase in the number of cells.
    NLM Medical Subject Headings
    U.S. National Library of Medicine, 2025
  • Increase in the number of resident cells, generally with an increase in mitotic figures present, per unit area in an organ or tissue.
    CDISC Terminology
    Clinical Data Interchange Standards Consortium (CDISC), 2021
  • Increased production of cells in a normal tissue or organ; may be harmless or a sign of precancerous changes.
    Harvard Dictionary of Health Terms
    Harvard Medical Publishing, 2011
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This content should not be used in place of medically-reviewed decision support reference material or professional medical advice. Some terms may have alternate or updated definitions not reflected in this set. The definitions on this page should not be considered complete or up to date.