Successful Treatment for a Huge Pulmonary Pseudoaneurysm in the Interlobar Segment with Coil Embolization: A Case...

A 62-year-old male with empyema underwent an attempted pleural drainage, which resulted in iatrogenic pseudoaneurysm formation of the right pulmonary artery in the interlobar segment. Endovascular treatment was favored over surgical intervention due to the presence of empyema. The pulmonary artery in the interlobar segment was embolized with metallic coils, with inevitable occlusion of blood perfusion in the middle and lower lobes. Despite the perfusion loss in a large lung territory, the patient eventually required no supplemental oxygenation. Coil embolization can be a favorable alternative to stent-grafting for pseudoaneurysm even in the interlobar segment, despite the potential risk of post-procedure hypoxemia.