squamous intraepithelial lesion, indeterminant grade

squamous intraepithelial lesion, indeterminant grade

SIL-IG, ungraded dysplasia Cytology A finding on a pap smear in which squamous cells that qualify as an intraepithelial lesion–ie, neoplasia, that defy placement in the high-grade–HSIL, moderate-to-severe dysplasia–ie, CIN 2–3 or low-grade–LSIL, HPV effect or low-grade dysplasia–ie, CIN 1. See The Bethesda System, CIN, Pap smear, Squamous intraepithelial lesion. Cf ASCUS, High-grade squamous intraepithelial lesion–HSIL, Low-grade squamous intraepithelial lesion–LSIL.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.