開心術後遠隔期に発生した無症候性慢性拡張性血腫をCTガイド下生検で診断した1例

Asymptomatic Chronic Expanding Hematoma Following Previous Cardiac Surgery Diagnosed by Computed Tomography-guided Biopsy：Report of a Case

はじめに　開心術後遠隔期に偶然に発見された無症候性の心臓腫瘤に対してCTガイド下生検を行い，慢性拡張性血腫（chronic expanding hematoma：CEH）と診断した1例を経験したので，文献的考察を加えて報告する．

A 48-year-old man was referred to our hospital with an intrapericardial mass, which was incidentally found by computed tomography （CT） in a health check-up. He had undergone surgical closure of atrial septal defect 23 years ago. Although echocardiography and CT revealed compression of the right ventricle by a mass, he had no symptoms and echocardiography revealed no significant right ventricular overload. Magnetic resonance imaging revealed a mosaic pattern of various signal intensities. We performed a CT-guided biopsy, and the histological result was a hematoma. This was the first reported case of chronic expanding hematoma following previous cardiac surgery diagnosed by CT-guided biopsy.