両側末梢性肺動脈瘤の1例

Bilateral Peripheral Pulmonary Artery Aneurysms：Report of a Case

はじめに　末梢性肺動脈瘤はまれな疾患であり，破裂すると致命的となる．われわれは長期経過観察された両側末梢性肺動脈瘤に対してコイル塞栓術を施行した症例を経験したので報告する．

Pulmonary artery aneurysms are extremely rare and can be fatal if ruptured. We report the case of a 72-year-old man who underwent coil embolization of bilateral peripheral pulmonary artery aneurysms. Ten years ago, a left upper lobe nodule was incidentally noted on a chest computed tomography （CT）. The nodule was suspected as a benign tumor and followed up. As it gradually enlarged, the patient referred to our hospital. Chest CT showed a 2.0-cm nodule in S1＋2 of the left lung and a 0.6-cm nodule in S10 of the right lung. Contrast-enhanced CT showed that each nodule had the same contrast enhancement as the pulmonary artery. The left upper lobe nodule and the right lower lobe nodule were connected by a shunt with A1＋2b and A10. They were diagnosed as pulmonary artery aneurysms, and coil embolization was performed. Eighteen months later, no enlargement of the pulmonary artery aneurysms or new lesions were observed.