A malignant mesenchymal neoplasm that arises from the vulva. Representative examples include childhood botryoid-type embryonal rhabdomyosarcoma, alveolar soft part sarcoma, and leiomyosarcoma. The disease is MONDO_0005214 (vulva sarcoma). Also known as: mammalian vulva sarcoma, sarcoma of mammalian vulva, sarcoma of vulva, vulvar sarcoma.