Lichen Sclerosus, VIN and Vulvar Itching: Getting the Right Diagnosis
When vulvar itching persists despite antifungal treatment, a more detailed assessment is needed. Two conditions in particular — lichen sclerosus and vulvar intraepithelial neoplasia (VIN) — require accurate diagnosis, specialist treatment, and long-term surveillance because of their association with vulvar cancer.
Lichen Sclerosus: Treating to Prevent Malignant Change
Lichen sclerosus (LS) is a chronic inflammatory skin condition affecting the vulva (and sometimes the perianal region). It produces white, thinned, fragile skin that itches severely and can lead to architectural distortion — fusion of the labia minora, burying of the clitoris, and narrowing of the vaginal introitus. It affects women of all ages but is most common after menopause.
The cornerstone of treatment is high-potency topical corticosteroid (clobetasol propionate 0.05%) applied to the affected skin. Used correctly — with a specific regimen of decreasing frequency over months — it controls symptoms, reverses the changes in most women, and critically, reduces the risk of malignant transformation. Untreated or inadequately treated lichen sclerosus carries a 4–6% lifetime risk of vulvar squamous cell carcinoma.
Women with lichen sclerosus require lifelong annual specialist review to monitor for progression or malignant change.
VIN: The Precancerous Change
Vulvar intraepithelial neoplasia (VIN) refers to full-thickness cellular abnormalities in the vulvar squamous epithelium that have not yet invaded. It is the precursor to vulvar squamous cell carcinoma. High-grade VIN (previously VIN 2/3, now called HSIL of the vulva) is most commonly caused by persistent HPV infection in younger women, or by differentiated VIN arising in the context of lichen sclerosus in older women.
Treatment of VIN includes topical imiquimod (an immune stimulant that clears HPV-related VIN in approximately 50–60% of cases), laser ablation, or surgical excision. Close surveillance with vulvoscopy (colposcopy of the vulva) is essential after treatment due to the 15–20% recurrence rate.
For vulvar skin assessment, colposcopy, and VIN management in Ahmedabad, contact Dr. Nishtha Tripathi Patel at +91 76988 00333.