左室内に発生した乳頭状線維弾性腫

Surgical Treatment of Papillary Fibroelastoma Developed in the Left Ventricle

原発性心臓腫瘍は全腫瘍の中で剖検例の0.02～0.04％程度のまれな疾患1，2）である．その大半を占めるのは粘液腫や乳頭状線維弾性腫などの良性腫瘍ではあるが，重篤な合併症をきたす可能性があり，早期の外科的摘出が肝要である3）．われわれは，狭心症精査中に発見された乳頭状線維弾性腫を経験したので，若干の文献的考察を交えて報告する．

Papillary fibroelastomas are rare benign cardiac tumors, which generally arise from the valvular endocardium. Although they have little hemodynamics effects, they can cause some life threatening events such as cerebral embolization. We herein report a case of 68-year-old female with a mobile left ventricular mass of 10 mm in diameter. It was accidentally found on the anterior papillary muscle by echocardiography under evaluation of the angina pectoris. Resection of the left ventricular mass was performed through the mitral valve. Coronary artery bypass grafting to left anterior descending artery was also performed using the left intra-thoracic artery. Pathological finding of the tumor was papillary fibroelastoma. Post-operative course was uneventful, with no recurrence about a year.