僧帽弁腱索より発生した乳頭状線維弾性腫の1例

Papillary Fibroelastoma Arising from Chordae Tendineae of the Mitral Valve Chordae；Report of a Case

はじめに　原発性心臓腫瘍はまれであり，その中でも乳頭状線維弾性腫は約8％を占めるにすぎない1）．僧帽弁腱索の乳頭状線維弾性腫に対して腫瘍摘出術を施行し，良好な結果を得たので，若干の文献的考察を加えて報告する．

Cardiac papillary fibroelastoma is a rare primary cardiac tumor arising from any part of the endocardium. In particular, papillary fibroelastoma originating from the mitral valve chordae is very rare. A 66-year-old man was hospitalized for a left ventricular tumor. Echocardiography revealed a high echoic mass of the mitral valve chordae with gradeⅠ mitral regurgitation. Under cardiopulmonary bypass, we performed excision of the mass and the marginal chordae of the mitral valve, and decided there was no need of valvuloplasty. Pathological diagnosis indicated the tumor was papillary fibroelastoma. The postoperative course was uneventful and echocardiography showed no progression of mitral valve regurgitation.