Analogous conditions include vaginal intraepithelial neoplasia and vulvar intraepithelial neoplasia. Most vulvar cancers are squamous cell cancers. Non-cancerous vulvar diseases include lichen sclerosus, squamous cell hyperplasia, and vulvar vestibulitis. Another female sexual pain disorder is called vulvodynia or vulvar vestibulitis. Women with lichen sclerosus may develop vulvar carcinoma. Vulvodynia is chronic pain in the vulvar region. Bleeding from hemorrhoids and vulvar lesions can be mistaken for postcoital bleeding. Bartholin gland carcinoma is a rare malignancy that occurs in 1% of vulvar cancers. Vaginal cancer and vulvar cancer are very rare, and primarily affect older women. It can also occur in vaginal walls and vulvar epithelium. Many malignancies can develop in vulvar structures. The exam may reveal an ulceration, lump or mass in the vulvar region. Pelvic floor muscles help to support the vulvar structures. Verrucous vulvar cancers tend to have good overall prognoses. They enclose and protect the vulvar vestibule, urethra and vagina.