ascus


Also found in: Thesaurus, Medical, Acronyms, Encyclopedia, Wikipedia.
Related to ascus: colposcopy

as·cus

 (ăs′kəs)
n. pl. as·ci (ăs′ī′, -kī′)
A membranous, often club-shaped structure in ascomycetes in which karyogamy occurs, followed by the formation of eight haploid ascospores.

[New Latin, from Greek askos, bag.]

ascus

(ˈæskəs)
n, pl asci (ˈæsaɪ; ˈæskaɪ)
(Botany) a saclike structure that produces (usually) eight ascospores during sexual reproduction in ascomycetous fungi such as yeasts and mildews
[C19: from New Latin, from Greek askos bag]

as•cus

(ˈæs kəs)

n., pl. as•ci (ˈæs aɪ, -kaɪ, -ki)
the sac in ascomycetes in which the spores are formed.
[1820–30; < New Latin < Greek askós bag, sac]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.ASCUS - saclike structure in which ascospores are formed through sexual reproduction of ascomycetesascus - saclike structure in which ascospores are formed through sexual reproduction of ascomycetes
reproductive structure - the parts of a plant involved in its reproduction
ascomycete, ascomycetous fungus - any fungus of the class Ascomycetes (or subdivision Ascomycota) in which the spores are formed inside an ascus
Translations

ASCUS

abbr atypical squamous cells of undetermined significance. V. cell.
References in periodicals archive ?
Anuscopic findings Anal cytology Normal LSIL ASCUS N % N % N % Suggestive of low-grade 6 28.
In epithelial cell abnormality, ASCUS, AGUS-NOS, and ASC-H make up 64.
The discordance scores were determined as follows: 0 if ASCUS-H or above, 1 for LSIL, 2 for ASCUS, and 3 for negative or unsatisfactory, which were considered screening failures.
Major Finding: Irrespective of HPV type, the vaccine reduced the risk for ASCUS by 8%, the risk for LSILs by 14%, and the risk for HSILs by 41%.
Histology cor relation with atypical squamous cells of undetermined significance (ASCUS) and low-grade squamous intraepithelial lesion (LSIL) cytology diagnoses: an argument to ensure ASCUS follow-up that is as aggressive as that for LSIL.
Whe ASCUS was used as a cutoff, liquid-based cytology was less specific
We considered it an undercall when Pap showed normal, ASCUS, LG SIL, or atypical squamous cells cannot exclude HG SIL (ASC-H) in the presence of histology of CIN 2 or worse.
ASCUS results occur in 5%-10% of Pap tests, the researchers noted, adding that the "increased risk of SIL among HIV-infected women has been well documented, and several groups have reported the increased risk of progression [to] SIL in this population.
For ASCUS testing, the National Cancer Institute conducted the ALTS clinical trial that demonstrated sensitivity of 96% for detection of high-grade cervical disease and cancer and a sensitivity of just 85% for liquid-based cytology.
The trial, initiated in early 2006, screened more than 50,000 subjects and enrolled over 3,400 subjects, including more than 1,300 women with atypical or ASCUS Pap test results.
Legend: ASCUS = atypical squamous cells of uncertain significance; LSIL= low grade squamous intra-epithelial lesion; HSIL=high grade squamous intraepithelial lesion; SCC = squamous cell carcinoma.
Inflammatory smears were seen in 70 patients (35%); 40 patients (20%) reported as ASCUS were subjected to High Risk Capture II assay (for HPV 16, 18, 45, 56, 58) and high-risk HPV DNA was found in 20 (50%) of the patients.