Malignant fibrous histiocytoma of the left ventricle: a case report.

Malignant fibrous histiocytoma (MFH) is the most common soft tissue sarcoma in adults, but is distinctly rare as a primary tumor of the heart. Herein we report a case of left ventricular MFH obstructing the outflow tract and presenting as congestive heart failure. Surgical removal of the mass confirmed the tissue diagnosis of MFH. To our knowledge, this is the first report of MFH originating from the left ventricle.