Severe Mitral Regurgitation After Valve Replacement as Cause of Pulmonary Venous Aneurysm

A4 9-year-old man was referred because of an acute myocardial infarction. He had undergone aortic and mitral valve replacements for endocarditis in 1984 (Figure 1⇓). In the early 1990s, the mitral valve had developed a paravalvular leak that was not regarded as consequential. A right-sided mass was noted on the chest roentgenogram, however, that was interpreted as a pericardial “cyst.” The patient denied trauma, vasculitis, syphilis, and chronic granulomatous diseases and had not been known to have a pericardial cyst previously. On …