Cardiac angiosarcoma: an unusual cause of coronary artery pseudoaneurysm.

Cardiac angiosarcoma is the most common of the cardiac sarcomas. It can infiltrate into adjacent structures in addition to seeding distant metastases. Coronary artery encasement is a rare but potentially life-threatening complication of cardiac angiosarcoma. We report a case of cardiac angiosarcoma encasing the right coronary artery with subsequent pseudoaneurysm formation with mural thrombus. Magnetic resonance first-pass, contrast-enhanced images are very useful for defining the communication between such lesions and underlying cardiac chambers. In the presence of distant metastases, there are limited treatment options. No intervention was attempted for the pseudoaneurysm, and thus far (12 mo) it has been stable.