Definition of Ascus
ASCUS: 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.Source: MedTerms™ Medical Dictionary
Last Editorial Review: 3/19/2012
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