Sterile, caseous mitral anular abscess

Echocardiography identified three patients with a mitral anular mass. Fluoroscopy demonstrated a faint, homogeneous intracardiac calcific density in each patient. Cardiac catheterization and angiography were performed and showed no left ventricular inflow or outflow obstruction. One patient died suddenly and two patients had cardiac surgery (one for mitral regurgitation and another for constrictive pericarditis). Examination demonstrated that each mass was nonencapsulated, sterile and acellular and contained cholesterol, calcium and fatty acids. The clinical significance and cause of these masses are unclear at present.

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