Vulvar Squamous Intraepithelial Lesion, HPV-Associated

**Semantic type:** Neoplastic Process

**Definition:** An intraepithelial lesion of the vulvar squamous epithelium associated with HPV infection. It is characterized by maturation abnormalities and nuclear hyperchromasia that are confined to the basement membrane.

**Synonyms:** - Classical VIN - Usual Type VIN - VIN of Usual Type - Vulvar Intraepithelial Neoplasia of Usual Type - Vulvar Intraepithelial Neoplasia, HPV-Associated - Vulvar SIL - Vulvar Squamous Intraepithelial Lesion