label: High Grade Vulvar Squamous Intraepithelial Lesion
label_lc: high grade vulvar squamous intraepithelial lesion
description: "An intraepithelial lesion of the vulvar squamous epithelium associated with HPV infection. It is characterized by loss of maturation, nuclear hyperchromasia, high nuclear:cytoplasmic ratios, cytological and architectural atypia, and mitoses. Two morphological patterns have been described: basaloid (undifferentiated) and warty (condylomatous, bowenoid). It carries a significant but relatively low risk of progression to squamous cell carcinoma if untreated. (WHO 2020)"