purpura

purpuric /perr pyoor"ik/, adj.
/perr"pyoor euh/, n. Pathol.
a disease characterized by purple or brownish-red spots on the skin or mucous membranes, caused by the extravasation of blood.
[1680-90; < NL, special use of L purpura. See PURPLE]

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Presence of hemorrhages in the skin, often associated with bleeding from natural cavities and in tissues.

Major causes include damage to small artery walls (as in vitamin deficiency or allergic reaction) and platelet deficiency (in association with such disorders as lupus erythematosus and as a complication of leukemia or chemotherapy).

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▪ medical disorder
      presence of small hemorrhages in the skin, often associated with bleeding from body cavities and in tissues. It occurs as a result of failure of hemostasis (arrest of bleeding), which may be caused by damage to the wall of small arterial vessels (vascular purpura) in vitamin deficiency ( scurvy), bacterial or viral infections, allergic reactions, or von Willebrand disease. Failure of hemostasis also may occur as a result of deficiency of platelets in association with such disorders as thrombocytopenia, immunothrombocytopenia, lupus erythematosus, thrombasthenia, leukemia, enlarged spleen, or as a complication of chemotherapy. A paradoxical type of bleeding is found when tissue materials (as the consequence of shock, trauma, burns) enter the bloodstream and cause clotting within the vessels. As the patient is depleted of platelets and clotting factors, bleeding may occur. This mechanism is often found behind severe hemorrhage during childbirth, when amniotic fluid leaks into the mother's circulatory system or there is premature tearing of the placenta.

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Universalium. 2010.

Look at other dictionaries:

  • PURPURA — proprie concha, cuius liquore olim vestes tingebantur. Cn. Mattius in Mimiambis, apud A. Gellium, l. 20. c. 9. Iam tonsiles tapetes ebrii fucô, Quos concha purpura imbuens venenavit. Dico, olim; quia Veterum Purpura nobis periit ut infra… …   Hofmann J. Lexicon universale

  • purpura — [ pyrpyra ] n. m. • 1837; mot lat. « pourpre » ♦ Méd. Ensemble de taches cutanées, de couleur rouge foncé, dues à des hémorragies circonscrites au niveau de la peau (pétéchies). Par ext. Maladie caractérisée essentiellement par de petites… …   Encyclopédie Universelle

  • Púrpura — Saltar a navegación, búsqueda Para otros usos de este término, véase Púrpura (desambiguación). Púrpura Coordenadas de color HTML #640099 RGB (r,g,b)B (102, 0, 153) …   Wikipedia Español

  • Purpura — Unter Purpura versteht man kleinfleckige Kapillarblutungen in der Haut, Unterhaut (Subkutis) oder den Schleimhäuten. Die einzelnen Blutungen können punktförmig (Petechien), seltener auch streifenförmig (Vibex), kleinflächig (Ekchymose) oder… …   Deutsch Wikipedia

  • púrpura — f. dermat. Hemorragia de eritrocitos en la piel o en mucosas que provoca la aparición de pequeñas manchas rojas. La púrpura suele estar causada por algún tipo de crisis sanguínea (trombopenia) o traumatismos. Medical Dictionary. 2011 …   Diccionario médico

  • púrpura — s. f. 1. Cor vermelha a tirar para o roxo. 2. Estofo tinto com a cor da púrpura. 3. As vestimentas régias (que antigamente eram cor de púrpura). 4.  [Por extensão] A dignidade real, o trono. 5. A dignidade de cardeal (por este usar vestes cor de… …   Dicionário da Língua Portuguesa

  • púrpura — adjetivo,sustantivo masculino 1. [Color rojo] que es muy intenso y tira a violeta: traje púrpura. No me gusta el púrpura. Los cardenales visten de púrpura. sustantivo femenino 1. Molusco marino que segrega un líquido amarillo que se vuelve rojizo …   Diccionario Salamanca de la Lengua Española

  • purpura — purpurà sf. (2); R283 žr. purpuras 2: Ir apsiautė jį purpura NTMr17,90. Apvilko jį skraiste purpùros DP168. Balti šilkai ir purpura yra jos rūbas VlnE160 …   Dictionary of the Lithuanian Language

  • púrpura — (Del lat. purpŭra). 1. f. Molusco gasterópodo marino, cuya concha, que es retorcida y áspera, tiene la boca o abertura ancha o con una escotadura en la base. Segrega en cortísima cantidad una tinta amarillenta, la cual al contacto del aire toma… …   Diccionario de la lengua española

  • Purpura — Pur pu*ra, n. [L., purple, purple fish: cf. F. purpura. See {Purple}.] 1. (Med.) A disease characterized by livid spots on the skin from extravasated blood, with loss of muscular strength, pain in the limbs, and mental dejection; the purples.… …   The Collaborative International Dictionary of English

  • purpura — 1753, from Mod.L., from L. purpura (see PURPLE (Cf. purple)). Disease characterized by purple patches on the skin …   Etymology dictionary

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