Increasing BMI is associated with both endometrioid and serous histotypes among endometrial rather than ovarian cancers: a case-to-case study.

•Obesity is independently linked to endometrial carcinogenesis, for both type I and type II tumors.•Serous tumors at endometrial level may be estrogen dependent.•This effect in endometrium is much more evident than in the ovary.•Obesity seems to be not very linked to ovarian carcinogenesis.