Asymptomatic right atrial leiomyosarcoma with tricuspid valve obstruction in a young female patient.

Primary cardiac leiomyosarcomas of the heart are rare tumors usually diagnosed post-mortem. Like other sarcomas located in the heart, it causes symptoms by obstruction or occlusion of cardiac cavities, local invasion, embolization or by systemic manifestations. We present an unusual case of a previously healthy young female patient who was accidentally diagnosed with a cardiac tumor of unknown origin during routine physical examination in May 1997. Until a few days prior to elective cardiac surgery for diagnostic purposes in June 1997, no clinical symptoms were present. To our surprise, a primary right atrial leiomyosarcoma was found which almost completely occluded the right atrium and destroyed the tricuspid valve. Despite the combination of surgical removal and adjuvant chemotherapy the patient died 3 weeks after the operation due to progressive tumor disease and development of congestive heart failure and lung embolism.