Extraovarian malignant Brenner tumour in a female of 35. Rapid infiltrating growth with the destruction of tumour. All extraovarian tumours described so far were benign, located in the mesosalpinx, uterus or vagina. In this case the starting point of the tumour was in the vagina wall or in the recto-vaginal septum. Histological picture produced difficulties in establishing histogenesis of malignancy. The true nature of the tumour was established only immunohistochemically.