Table 1

The Bethesda system for rating cytology

Bethesda systemDescriptionPapanicalou classificationCervical intraepithelial neoplasia
ASCUSAtypical squamous cells of undetermined significanceSquamous atypiaPapanicolaou class II
LSILLow grade squamous intraepithelial lesionsMild dysplasia, koilocytic or condylomatous atypiaPapanicolaou class IIICIN I
HSILHigh grade squamous intraepithelial lesionModerate to severe dysplasiaPapanicolaou class IVCIN II CIN III
Papanicolaou class IVCarcinoma in situ