Ultrasonography findings of proximal-type epithelioid sarcoma of the vulva: A case report.

Proximal-type epithelioid sarcoma (PES) of the vulva is an exceedingly rare malignant soft tissue tumor. We herein present the case of a 41-year-old female patient who presented to our hospital with complaints of a painless mass in the right mons pubis that she had first noticed 3 years prior. Ultrasonographic (US) and color Doppler ultrasonographic (CDUS) examination revealed a solid mass with well-defined, homogeneous hypoechoic structure and quite hypervascular on CDUS. The results of the immunohistochemical examination confirmed the diagnosis of vulvar PES (myxoid variant). The patient was treated with wide local excision and remained recurrence- and metastasis-free at 9 months postoperatively. Although cases of PES in the pelvic region had been previously reported, to the best of our knowledge, the US or CDUS findings of PES of the vulva have not been described to date.