Synopsis: Vulvar intraepithelial neoplasia (VIN) is a noninvasive squamous lesion and a precursor to vulvar squamous cell carcinoma. Surgery is the primary treatment for VIN; however, depending on the lesion's size and location, surgical intervention can be highly invasive. In other countries, randomized controlled trials of topical imiquimod for VIN have been reported, and treatment efficacy comparable to surgical excision is anticipated.Key words: Vulva, Imiquimod, Intraepithelial neoplasia, non-surgical treatment
We report the case of a 59-year-old woman who developed VIN2 at the postoperative margin around the vaginal introitus eight years after undergoing vulvar cancer surgery. The lesion gradually enlarged and progressed to VIN3 by the eleventh postoperative year, necessitating intervention. Given the high invasiveness of surgical excision, off-label use of topical imiquimod was initiated after obtaining approval from the institutional ethics committee. The patient applied imiquimod two to three times per week for 16 weeks.
The treatment resulted in a partial response, with regression to VIN1. Side effects were limited to mild pain and dysuria during the initial treatment period, which subsequently resolved. At five months post-treatment, cytology revealed LSIL with no histological evidence of recurrent disease.
Topical imiquimod presents a minimally invasive and effective treatment option for VIN, particularly in cases where surgical intervention may compromise quality of life.
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