左房壁に発生した乳頭状線維弾性腫の1例

Papillary Fibroelastoma Arising from the Left Atrial Wall：Report of a Case

はじめに　乳頭状線維弾性腫（PFE）は，原発性心臓腫瘍の中ではまれな疾患である．本腫瘍は良性腫瘍であるが，脳梗塞や心筋梗塞を引き起こす可能性があるため，外科的切除が必要である1，2）．発生部位としては弁表面から発生するものが多く，心房壁から発生するものはまれである．われわれは，左房壁より発生したPFEの1例を経験したので報告する．

Papillary fibroelastoma （PFE） is a rare benign cardiac tumor generally arising from the valvular endocardium. We report an extremely rare case of PFE arising from the left atrial wall. A 70-year-old male patient was admitted to our hospital with a diagnosis of left atrial tumor. Echocardiography and enhanced computed tomography showed an approximately 14 mm mass on the left atrial wall. Moreover, the magnetic resonance imaging showed hyperintenseness on a T2-weighted image. We diagnosed the tumor as a myxoma. Intraoperatively, we found a mobile tumor on the left atrial wall. It had a sea anemone-like appearance and was suspected to be PFE. We performed the tumor resection including the left atrial wall. Histological examination confirmed PFE. His postoperative course was uneventful.