Three rare epithelial ovarian tumours, one malignant Brenner tumour, o
ne transitional cell carcinoma and one Brenner tumour of borderline ma
lignancy, are presented with special emphasis on the diagnostic, progn
ostic and therapeutic modalities. Because the prognosis of transitiona
l cell carcinoma of the ovary is worse, as in our case, than that of t
he malignant Brenner tumour, this classification is justified.