[Uterine hemangiopericytomas. Two case reports].

The diagnosis of uterine haemangiopericytoma is still a matter of debate. The existence of haemangiopericytoma must be proven on the basis of classical histology, ultrastructure histology and immunohistochemical analyses. The diagnosis, even when apparently sure, must nevertheless be proven. We described two cases emphasizing the clinical and laboratory features of uterine haemangiopericytoma. Progress in nuclear magnetic resonance imaging, ultrastructural analysis and immunohistochemistry should help in confirming the diagnosis of haemangiopericytoma. Highly vascular leiomyoma or low malignity grade leiomyosarcoma have been mistakenly identified as haemangiopericytoma.