''VIN is a pre-cancerous change in the vulvar skin. This condition IS NOT CANCER. If left untreated it can go away or MAY develop into cancer, although this is a very slow process, usually taking years to develop into cancer.''
''Vulvar Intraepithelial Neoplasia (VIN) is the presence of abnormal cells in the vulvar skin. This condition may occur anywhere on the vulva. It can occur in one area or several areas in the vulvar skin at the same time'' (quote).