Intravenous uterine leiomyosarcomatosis with intracardial extension.

Uterine leiomyosarcoma is a rare malignant tumor of smooth muscle origin. We describe the case of a 64-year-old female with intravenous uterine leiomyosarcomatosis with the extension of the tumor mass into the inferior vena cava and right atrium. As initial tissue diagnosis of the tumor obtained from the uterine and right atrial masses suggested intravenous leiomyomatosis, surgical resection was carried out using a one-stage procedure via a laparotomy and median sternotomy with cardiopulmonary bypass and circulatory arrest. Subsequent histology revealed uterine leiomyosarcoma with an intravenous spread, which to our knowledge is only the second case that has been described.