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Magnetic Resonance Imaging of Cardiac Masses

Cardiac masses are classified as neoplastic and nonneoplastic, with the neoplasms further classified as benign and malignant (Table 1). The overall prevalence of cardiac neoplasms at autopsy is 0.002% to 0.3%,1 with metastases 20 to 40 times more common than primary neoplasms. The incidence of primary cardiac neoplasms at autopsy is 0.002% to 0.19%.1 Sixty-five percent of primary cardiac neoplasms are benign, the majority of which are myxomas.1 The clinical symptoms of primary cardiac neoplasms depend on the type, size, and location of the mass. Benign cardiac neoplasms have good prognosis, but occasionally they can cause valvular or cavitary obstruction, embolization, or arrhythmias.