Massive right ventricular outflow tract aneurysm after ventriculotomy for subvalvular pulmonic stenosis associated with peripheral pulmonary arterial stenoses

Abstract

From the Pathology and Surgery Branches, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, Maryland . Manuscript received and accepted January 4, 1983, On leave from the Department of Pathology, Washington University, St. Louis, Missouri . ical tabulated sessile yellow mass, 23 X 22 X 14 mm . The chordae tendineae of this cusp were thickened and emerged from another yellow 20 X 12 X 8 mm mass that had largely replaced the posterior papillary muscle (Fig . 3) . The anterior cusp was normal. The mitral valve and the papillary muscles were excised and replaced by a 31 mm Bjork-Shiley prosthesis . The postoperative course was uneventful . Histologic examination of sections of the valve and thepapillary muscle tumors showed simple pure lipomas composed of mature fat cells (Fig . 4) .