Hypoplasia


Hypoplasia

Hypoplasia is underdevelopment or incomplete development of a tissue or organ.[1] Although the term is not always used precisely, it properly refers to an inadequate or below-normal number of cells.[2] Hypoplasia is similar to aplasia, but less severe. It is technically not the opposite of hyperplasia (too many cells). Hypoplasia is a congenital condition, while hyperplasia generally refers to excessive cell growth later in life. (Atrophy, the wasting away of already existing cells, is technically the direct opposite of both hyperplasia and hypertrophy.)

The name is derived from the Greek: hypo, meaning low, and plasis, which refers to molding or forming.[2] The adjective form is hypoplastic.

Hypoplasia can be present in any tissue or organ. It is descriptive of many medical conditions such as:

Underdeveloped:

See also

  • Aplasia, when an organ (or part of an organ) is entirely missing
  • Atrophy, when an existing part wastes away
  • Dysplasia, abnormal development of an organ or extremity
  • Neoplasia, new, disordered growth of tissue

References

  1. ^ Definition: hypoplasia from Online Medical Dictionary
  2. ^ a b http://activate.lww.com/semdweb/internetsomd/ASP/1527483.asp



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Look at other dictionaries:

  • hypoplasia — hypoplasia. См. гипоплазия. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • hypoplasia — [hī΄pō plā′zhə] n. [ModL < HYPO + PLASIA] a condition of decreased or arrested growth of an undeveloped organ or tissue of the body hypoplastic [hī΄pōplas′tik] adj …   English World dictionary

  • Hypoplasia — Underdevelopment or incomplete development of a tissue or organ. For example, there can be hypoplasia (underdevelopment) of the enamel of the teeth. Hypoplasia is less drastic than aplasia where there is no development at all. * * * 1.… …   Medical dictionary

  • hypoplasia — n. underdevelopment of an organ or tissue. Dental hypoplasia is the defective formation of parts of a tooth, for example due to systemic upset while the tooth is being formed. Derivatives: hypoplastic adj …   The new mediacal dictionary

  • Hypoplasia — nepakankamas susiformavimas statusas T sritis gyvūnų raida, augimas, ontogenezė, embriologija atitikmenys: lot. Hypoplasia ryšiai: platesnis terminas – nepakankamumas sinonimas – hipoplazija …   Veterinarinės anatomijos, histologijos ir embriologijos terminai

  • Hypoplasia — nepakankamas susiformavimas statusas T sritis gyvūnų raida, augimas, ontogenezė, embriologija atitikmenys: lot. Hypoplasia ryšiai: platesnis terminas – per lėtas augimas sinonimas – hipoplazija …   Veterinarinės anatomijos, histologijos ir embriologijos terminai

  • Hypoplasia — nepakankamas susiformavimas statusas T sritis embriologija atitikmenys: lot. Hypoplasia ryšiai: platesnis terminas – per lėtas augimas …   Medicininės histologijos ir embriologijos vardynas

  • Hypoplasia — nepakankamas susiformavimas statusas T sritis embriologija pavyzdys( iai) neišsivýsčiusi gimdà atitikmenys: lot. Hypoplasia ryšiai: platesnis terminas – vienas organas sinonimas – hipoplazija …   Medicininės histologijos ir embriologijos vardynas

  • Hypoplasia — nepakankamas susiformavimas statusas T sritis embriologija pavyzdys( iai) neišsivýsčiusi gimdà atitikmenys: lot. Hypoplasia ryšiai: platesnis terminas – vietinė dalis sinonimas – hipoplazija …   Medicininės histologijos ir embriologijos vardynas

  • hypoplasia — noun underdevelopment of an organ because of a decrease in the number of cells • Hypernyms: ↑dysplasia * * * ˌ ̷ ̷ ̷ ̷+ˈplāzh(ē)ə noun ( s) Etymology: New Latin, from hypo + plasia : a condition of arrested development in which an organ or part… …   Useful english dictionary


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