CTスキャンが有用であった肺動脈瘤の1例

Computed tomographic diagnosis of pulmonary artery aneurysm

　肺動脈瘤は非常にまれな疾患であり，Clagettらは剖検例の検討で，約14,000例について1例の頻度と報告している^1）。われわれは，今回心房中隔欠損症に巨大肺動脈瘤を合併し，その診断に肺血管造影よりむしろ，CTスキャンが有用であった症例を経験したので，若干の文献的考察を加えて報告する。

Pulmonary artery aneurysms are rare lesions. Clagett et al reported that one aneurysm of the pulmonary artery may be found in approximately 14,000 necrop-sies. We have experienced a case of giant pulmonary artery aneurysm confirmed by computed tomography.

A 38 year-old man with atrial septal defect admitted to Kanazawa City Hospital. He had been pointed out of a right hilar mass when he was 26 years old. His complaint was bloody sputum and cough. Pulmonary angiography was not useful for the definite diagnosis because of its mural thrombi. Enhanced computed tomography showed a giant pulmonary artery aneurysm with a mural thrombi in its cavity. This shows that enhanced computed tomography is very useful for the diagnosis of a pulmonary artery aneurysm with a mural thrombi in its cavity.