A persistently recurring peri-urethral soft tissue lesion of the vulva

We report on a 84-year-old diabetic and hypertensive woman who had previously undergone skinning vulvectomy for lichen planus and an embolectomy of the left femoral artery. The patient presented with a rapidly growing vulvar mass. The biopsy showed spindle cell proliferation in a loose myxoid stroma with granulation tissue and a mixed inflammatory infiltrate. Based on histology and immunohistochemistry, the initial diagnosis was that of a benign lesion. In view of the persistent recurrence of the lesion and the absence of metastatic spread, we conclude that the lesion has a low-grade malignant potential and suggest the diagnosis of florid cellular reactive pseudosarcomatous myofibroblastic proliferation.