Ascus


Ascus
1. An acronym for Atypical Squamous Cells of Undetermined Significance. This term is used in the Bethesda System for reporting Pap smear findings and indicates that some flat (squamous) cells look unusual and may or may not be pre-malignant or malignant. Of all Pap tests with an ASCUS reading, 90-95% are caused by benign conditions, chiefly infections. The remaining 5-10% prove to be precancer or cancer. 2. An elongated spore case containing the spores of certain fungi including yeast. The acronym ASCUS stands for Atypical Squamous Cells of Undetermined Significance and is part of the Bethesda System for reporting of Pap smear results. This microscopic diagnosis means that some flat (squamous) cells look unusual and may or may not be premalignant or malignant.
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In the Bethesda system, acronym for atypical squamous cells of undetermined significance, under cell. SEE ALSO: Bethesda system.
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atypia of squamous cells of undetermined significance

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as·cus 'as-kəs n, pl as·ci 'as-.(k)ī, -.kē the membranous oval or tubular sporangium of an ascomycete

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as·cus (asґkəs) pl. asґci [Gr. askos bag] the sporangium or spore case of certain lichens and fungi, consisting of a single terminal cell. See Ascomycotina.

Medical dictionary. 2011.

Look at other dictionaries:

  • Ascus — von Hypocrea virens mit acht doppelzelligen Ascosporen Der Ascus (Plural: Asci, übersetzt: Schlauch) ist das charakteristische und (für den wissenschaftlichen Namen Ascomycota) namensgebende Fortpflanzungsorgan der Schlauchpilze. Es handelt sich… …   Deutsch Wikipedia

  • Ascus — Saltar a navegación, búsqueda El temino Ascus puede hacer referencia a: Ascus (micología) ASCUS (medicina) es un acrónimo utilizado en medicina Obtenido de Ascus Categoría: Wikipedia:Desambiguación …   Wikipedia Español

  • Ascus — As cus, n.; pl. Asci. [NL., fr. Gr. ? a bladder.] (Bot.) A small membranous bladder or tube in which are inclosed the seedlike reproductive particles or sporules of lichens and certain fungi. [1913 Webster] …   The Collaborative International Dictionary of English

  • ascus — ascus. См. сумка. (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.

  • Ascus — (v. gr., Sporenschlauch, Schlauchzelle), eine erweiterte u. oft auch verlängerte Zelle, welche bei den Flechten u. Pilzen die Sporen einschließt. Ascigĕrus, sporenschlauchführend …   Pierer's Universal-Lexikon

  • Ascus — (lat.), s. Sporenschlauch …   Meyers Großes Konversations-Lexikon

  • Ascus — (grch. askós), Schlauchzelle, Mehrzahl asci, s. Askomyzeten …   Kleines Konversations-Lexikon

  • Ascus — Ascus, Meiosporangium der ⇒ Ascomycetes; entsteht aus dem befruchteten Ascogon, dem f Gametangium. In ihm ordnen sich m und f Kerne zu Kernpaaren an, die sich synchron teilen. Während sich bei den Hefen die Zygote direkt zum A. entwickelt,… …   Deutsch wörterbuch der biologie

  • ascus — sac in certain fungi, 1830, Mod.L., from Gk. askos leather bag, wine skin, of unknown origin …   Etymology dictionary

  • ascus — [as′kəs] n. pl. asci [as′ī΄] [ModL < Gr askos: see ASCO ] in ascomycetous fungi, a sac in which spores (usually eight) are produced and meiosis occurs …   English World dictionary

  • Ascus — An ascus (plural asci) is the sexual spore bearing cell produced in ascomycete fungi. On average, asci normally contain 8 ascospores, produced by a meiotic cell division followed, in most species, by a mitotic cell division. However, asci in some …   Wikipedia


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