心エコーで左室圧排所見を呈した巨大心膜囊胞の1例

Giant Pericardial Cyst with Left Ventricular Compression on Echocardiography：Report of a Case

はじめに　心膜囊胞はまれな縦隔腫瘍であり，中でも心臓に及ぼす影響を画像的にとらえたとする報告はきわめてまれである．われわれは心エコーで左室圧排所見を呈した巨大心膜囊胞を胸腔鏡下に切除した症例を経験したので報告する．

We report a very rare case of giant pericardial cyst with left ventricular compression on echocardiography. A 61-year-old man visited our hospital with a feeling of chest tightness. A cardiologist ruled out cardiac diseases of the patients and he was referred to us for examination and treatment of an abnormal left lung field shadow on chest x-ray. Chest computed tomography （CT） showed a 16×7.5 cm cystic mass in connect with the heart and diaphragm. Echocardiography showed that the cystic mass was compressing the left ventricle. Surgical resection was attempted by video-assisted thoracoscopic surgery （VATS）. We aspirated serous liquid contents in the cyst and partially resected the cyst wall excepting cardiac side. After confirming the cyst was not a pericardial diverticulum, we completely resected its residual wall. His postoperative course was uncomplicated. The cyst was pathologically diagnosed as a pericardial cyst.