Stromal osseous metaplasia in urothelial carcinoma of the bladder: a rare case report and literature review.

Background: The bone formation within bladder tumors could be encountered in 3 conditions. These might consist of malignant bone formation in mesenchymal tumors; mixed mesenchymal and epithelial tumors; and epithelial tumors with stromal osseous metaplasia (SOM). This last is relatively rare.

[Ovarian pregnancy: about 3 cases and review of the literature].

Ovarian pregnancy is a rare event among women with ectopic pregnancy in whom the ovary is the site of implantation. Its diagnosis requires a well codified approach. The peculiarities of the determining factors, of the histopathological and evolutionary features typical of ovarian pregnancies led us to focus on this form of ectopic pregnancy.