[Intravascular leiomyomatosis of uterine origin. a case of pseudo-metastatic cavo-cardial thrombus].

Background: Leiomyomatosis is a benign smooth muscle tumor which can provoke serious complications in case of intracaval or intracardiac extension.
Case Report: A 61-year-old woman had undergone hysterectomy at the age of 45 years for a hemorrhagic fibroma. She underwent surgery for infiltrative breast cancer 3 months before hospitalization and was taking tamoxifen 30 mg/day. In the cancer context, the diagnosis of cavo-cardiac metastatic thrombus was proposed but not confirmed at pathology. The diagnosis of uterine tissue intravascular leiomyomatosis was established on the basis of pathology findings and immunohistochemistry results.
Discussion: Five other cases of leiomyomatosis after hysterectomy have been reported in the literature.