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Vulvar Cancer - Cancer that begins in the tissues of the vulva. The vulva is the external part of the female genitalia, including the labia, clitoris, and vaginal opening. Vulvar cancer most often affects the vaginal lips (the edges of the labia). Over 90 percent of all vulvar cancers are squamous cell carcinomas (which begin in slow-developing squamous skin cells). Other types of vulvar cancer include melanomas and adenocarcinomas. Common vulvar cancer risk factors include age (women over age 50) and HPV (human papillomavirus) infection.
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