<prompt> Which of these is FALSE of vulvar carcinoma?Most common type is squamous cell carcinomaIn situ vulvar cancer occurs more commonly in older femalesBasaloid or way type is associated with HPVKeratinising type is associated with lichen sclerois and occurs in older females  <response>: Most common histological type of ca vulva is squamous cell carcinoma In situ vulval cancer occurs more commonly in young females due to rising incidence of HPV infection. Basaloid or way types Keratinizing 40 of squamous 60 of squamous Multifocal Unifocal Younger patients Older patients Related to HPV Not related to HPV, related to lichen sclerosis Usual VIN, immunosuppression, smoking related Differentiated VIN, chronic inflammatory dermatosis 