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The 2020 World Health Organization tumor classification
| Classification | |
|---|---|
| HPV-associated squamous intraepithelial lesions | Low-grade squamous intraepithelial lesion of the vulva High-grade squamous intraepithelial lesion of the vulva |
| HPV-independent VIN | Differentiated vulvar intraepithelial neoplasia Differentiated exophytic vulvar intraepithelial lesion Vulvar acanthosis with altered differentiation |
HPV, human papillomavirus; VIN, vulvar intraepithelial neoplasia.
