Aberrant aneurysm of adult-type pulmonary sequestration: report of a case.

Aberrant pulmonary artery exposed by high-blood pressure over a long period in adult-type pulmonary sequestration can be susceptible to arteriosclerotic change and aneurysmal formation. Dividing this aneurysmal artery has a risk of stump leakage and aneurysm. We herein report a 64-year-old man with an aberrant aneurysm of intralobar pulmonary sequestration. Thoracoscopic resection of the sequestrated lung was performed uneventfully by prior endovascular occlusion of the aberrant aneurysm.