A benign neoplasm that arises from the vulva and is characterized by the presence of nests of monomorphic basaloid cells forming small cysts that contain keratin. The disease is Monarch Disease Ontology id MONDO_0002201 (vulvar trichoepithelioma). Also known as: mammalian vulva trichoblastoma, trichoblastoma of mammalian vulva, vulvar trichoblastoma.