[Arrhenoblastoma with following pregnancy].

The emergence, the morphology, the characteristic symptoms, the treatment and prognosis of a rare tumour of the ovary, arrhenoblastoma, is dealt with in this article. This is followed by the writer's own experience of the case of a 24 year old patient who had a normal pregnancy and birth 2 years after the existirpation of a tumour on the left side, which, having been detected by change, proved to be a non-malignant arrhenoblastoma. The symptoms of virilism so typical of the tumour had disappeared. The normal female characteristics had returned. The patient has now been free of symptoms for 10 years. In cases of increasing virilism differential diagnostics should consider the possibility of this rare tumour.