Abstract
We report a case of hidradenoma papilliferum of the vulva. A 70-year-old woman was admitted to our hospital with a vulvar tumor. Cytologic smear examination revealed seat-shaped tumor cells. The nuclei contained uniformly distributed fine granular chromatin. Around the seat, cells with thin concentrated chromatin were detected. Subsequently, local excision was performed. Histological findings of the resected specimen showed that the tumor was composed of cells organized in tubular and papillary structures. The tumor contained epithelial cells with apical snouts and p63-positive myoepithelial cells were observed on immunostaining. Apocrine metaplasia was detected. No mitotic figures or atypical nuclei were observed.
