Vulvar Intraepithelial Neoplasia (VIN) is a pre-cancerous condition affecting the vulvar epithelium. It involves abnormal changes in the skin cells of the vulva, which if left untreated, can potentially progress to vulvar cancer. VIN is classified into VIN 1, VIN 2, and VIN 3 based on the severity of the dysplasia, with VIN 3 being the most severe.
