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**''Differentiated VIN'' is mostly irrelevant as it is basically never seen alone, i.e. it usually accompanies cancer. | **''Differentiated VIN'' is mostly irrelevant as it is basically never seen alone, i.e. it usually accompanies cancer. | ||
Low grade pre-cancerous lesions (VIN) are typically HPV positive, while high grade pre-cancerous lesions and cancer are less often HPV positive.<ref name=pmid19115209>{{cite journal |author=De Vuyst H, Clifford GM, Nascimento MC, Madeleine MM, Franceschi S |title=Prevalence and type distribution of human papillomavirus in carcinoma and intraepithelial neoplasia of the vulva, vagina and anus: a meta-analysis |journal=Int. J. Cancer |volume=124 |issue=7 |pages=1626–36 |year=2009 |month=April |pmid=19115209 |doi=10.1002/ijc.24116 |url=}}</ref> | Low grade pre-cancerous lesions (VIN) are typically HPV positive, while high grade pre-cancerous lesions and [[cancer]] are less often HPV positive.<ref name=pmid19115209>{{cite journal |author=De Vuyst H, Clifford GM, Nascimento MC, Madeleine MM, Franceschi S |title=Prevalence and type distribution of human papillomavirus in carcinoma and intraepithelial neoplasia of the vulva, vagina and anus: a meta-analysis |journal=Int. J. Cancer |volume=124 |issue=7 |pages=1626–36 |year=2009 |month=April |pmid=19115209 |doi=10.1002/ijc.24116 |url=}}</ref> | ||
==Classic vulvar intraepithelial neoplasia== | ==Classic vulvar intraepithelial neoplasia== |
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