A case report of vulvar embryonal rhabdomyosarcoma in an adult pregnant woman

Embryonal rhabdomyosarcoma (ERMS) is the most common soft tissue sarcoma in children, but it is rare in adults, where cases are reported as individual cases or series. We present an ERMS found in the vulva of a 24-year-old pregnant woman who complained of a painless soft tissue mass in her left vulva. The mass grew rapidly within a month, and abortion, internal iliac artery embolization, and chemotherapy were performed. Despite an initially good response, cancer unfortunately progressed, and the patient passed away within one year after diagnosis. Adults with ERMSs tend to have poorer outcomes than children, and our case suggests that in some cases, pregnancy may accelerate the deterioration of the tumor.