A case of intralobar pulmonary sequestration presenting as a mass shadow with aneurysm of the aberrant artery

概要

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A 39-year-old man showed an abnormality on a chest radiograph, but had not consulted a doctor. He presented with bloody sputa. Chest computed tomography at our hospital revealed consolidation in the left lower lobe. Based on the detection of an anomalous arterial supply to the basal segment in the left lower lobe originating from the thoracic aorta on chest magnetic resonance angiography, a diagnosis of intralobar pulmonary sequestration was made. Wedge resection of the sequestered lung in the left lower lobe with division of the anomalous artery was performed. Although the diameter of the aberrant artery was 8 mm at the orifice, it was dilated as aneurysmal change up to 25 mm in the affected lung. There have been some case reports of intrapulmonary sequestration accompanied by aneurysmal change of the aberrant artery. In such cases early surgical intervention is recommended as rupture of the aneurysm can be fatal considering the fragile nature of the aberrant artery.