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Vaginal intraepithelial neoplasia (VAIN) is a condition that describes premalignant histological findings in the vagina characterized by dysplastic changes.[1]
| Vaginal intraepithelial neoplasia | |
|---|---|
| Specialty | Oncology |
The disorder is rare and generally has no symptoms.[2] VAIN can be detected by the presence of abnormal cells in a Papanicolaou test (Pap smear).[2]
Like cervical intraepithelial neoplasia, VAIN comes in three stages, VAIN 1, 2, and 3.[3] In VAIN 1, a third of the thickness of the cells in the vaginal skin are abnormal, while in VAIN 3, the full thickness is affected.[3] VAIN 3 is also known as carcinoma in-situ, or stage 0 vaginal cancer.[3]
Infection with certain types of the human papillomavirus ("high-risk types") may be associated with up to 80% of cases of VAIN.[4] Vaccinating with HPV vaccine before initial sexual contact has been shown to reduce incidence of VAIN.[5]
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