Atypical Cells of Undetermined Significance. The term is used to define a group of squamous cell abnormalities in cervical cells that cannot be explained on the basis of inflammatory or reactive processes, but lack the criteria for a diagnosis of LGSIL. ASCUS is the "gray zone" of Pap Smear diagnosis.
Atypical squamous cells of undetermined significance. These are minor epithelial cell changes whose nature is uncertain but which may result from inflammation and repair processes, human papilloma virus (HPV) effect or minor squamous or glandular intraepithelial neoplasia
Atypical Squamous Cells of Uncertain Significance