Large-sized pedunculated and polypoidal angiomyofibroblastoma of the vulva: A case report and literature review.

Angiomyofibroblastoma (AMF) represents a rare, benign mesenchymal tumor with a predilection for the vulvovaginal region, which may be misdiagnosed as aggressive angiomyxoma (AAM). Herein, we report a case of a 20-year-old nulliparous Chinese woman with a unique pedunculated and polypoidal mass, which had been developing within the previous 6 months in the left labium majus, exhibiting the AAM clinical impression but diagnosed as AMF. The mass measured 18 × 10 × 6 cm, and contained diffuse ulcerated areas and purulent discharge. A complete excision of the mass was performed. There was no subsequent evidence of recurrence, according to a 13-month follow-up. As a rare benign vulvovaginal tumor, AMF can present on patients of an early reproductive age with rapidly growing, polypoidal pattern. The whole exon sequencing analysis revealed the genomic alterations, which may contribute to the occurrence of AMF.