Right atrial metastasis of uterine leiomyosarcoma causing obstructive shock

Uterine leiomyosarcomas are rare tumours, and secondary cardiac metastases are even rarer. We present the case of a 56-year-old ethnic Chinese woman who was being treated with adjuvant pelvic radiation for uterine leiomyosarcoma when she presented with signs of right heart failure and shock. She was rapidly diagnosed with a solid mass attached to the tricuspid valve. Subsequent surgical resection revealed leiomyosarcoma metastasis. Metastases of uterine leiomyosarcoma to the heart are extremely rare, but clinicians should be aware of this phenomenon. Surgical resection, when feasible, can be associated with longer survival.