metaplasia

metaplasia
n.
an abnormal change in the nature of a tissue, usually in response to an environmental factor. For instance, columnar epithelium lining the bronchi may be converted to squamous epithelium (squamous metaplasia) following exposure to cigarette smoke. Prolonged exposure to gastric acid may result in the squamous epithelium of the oesophagus being converted to glandular epithelium (glandular metaplasia). Myeloid metaplasia is the development of bone marrow elements, normally found only within the marrow cavities of the bones, in organs such as the spleen and liver. This may occur after bone marrow failure. Metaplasia is not itself a premalignant condition, but neoplasms (abnormal new growths) may arise in metaplastic tissues if the initiating stimulus is not removed.
Derivatives:
metaplastic adj.

The new mediacal dictionary. 2014.

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Look at other dictionaries:

  • metaplasia — f. histol. Transformación de un tejido en otro de forma y funciones distintas. Medical Dictionary. 2011. metaplasia producción d …   Diccionario médico

  • metaplasia — s. f. [Medicina] Alteração de uma célula ou de um tecido em célula ou tecido de outro tipo.   ‣ Etimologia: meta + plasia …   Dicionário da Língua Portuguesa

  • metaplasia — [met΄ə plā′zhə] n. [ META + PLASIA] 1. abnormal change of one type of adult tissue to another 2. conversion of one tissue into another, as of cartilage into bone metaplastic [met΄əplas′tik] adj …   English World dictionary

  • Metaplasia — plasia Anaplasia – dedifferentiation Hyperplasia – physiological proliferation Increase in number of cells Neoplasia – abnormal proliferation Dysplasia – maturation abnormality Metaplasia – cell type conversion …   Wikipedia

  • metaplasia — Abnormal transformation of an adult, fully differentiated tissue of one kind into a differentiated tissue of another kind; an acquired condition, in contrast to heteroplasia. SYN: metaplasis …   Medical dictionary

  • Metaplasia — En histología se llama metaplasia al cambio de un epitelio maduro por otro maduro que puede tener un parentesco próximo o remoto. Los fenómenos de metaplasia son completamente normales en los tejidos embrionarios que tienden naturalmente a… …   Wikipedia Español

  • Metaplasia — ► sustantivo femenino MEDICINA Transformación de un tejido vivo en otro de estructura y función diferentes. * * * En histología se llama metaplasia al cambio en las características propias de un determinado tipo celular que adopta las propias de… …   Enciclopedia Universal

  • metaplasia — metaplastic /met euh plas tik/, adj. /met euh play zheuh, zhee euh/, n. Pathol. the transformation of one type of tissue into another. [1885 90; META + PLASIA] * * * ▪ physiology       in zoology, the conversion of one type of living cell or… …   Universalium

  • Metaplasia — vienos rūšies audinio virtimas kitos rūšies audiniu statusas T sritis gyvūnų raida, augimas, ontogenezė, embriologija atitikmenys: lot. Metaplasia ryšiai: platesnis terminas – dediferenciacija sinonimas – metaplazija …   Veterinarinės anatomijos, histologijos ir embriologijos terminai

  • Metaplasia — vienos rūšies audinio virtimas kitos rūšies audiniu statusas T sritis embriologija atitikmenys: lot. Metaplasia ryšiai: platesnis terminas – dediferenciacija …   Medicininės histologijos ir embriologijos vardynas

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