Predisposing factor for carcinoma vulva is all Except

The etiologic role of ceain viruses in carcinogenesis, paicularly high-risk HPV types 16 and 18, in these sites is well documented. Mention has already been made about the preceding stage of vulval epithelial disorders, paicularly squamous hyperplasia, in the development of these lesions. Ref: HARSH MOHAN TEXTBOOK OF PATHOLOGY 6th Ed. Pg no:723