Surgical treatment of ruptured metastatic pleomorphic leiomyosarcoma.

A rare case of primary cardiac leiomyosarcoma was diagnosed in a 21-year-old man who presented with a groin mass thought to be a sebaceous cyst. Histopathology revealed a high-grade pleomorphic leiomyosarcoma. Combined positron-emission and computed tomography showed a large metabolically active left atrial mass with multiple metastases.