Extralobar Pulmonary Sequestration Diagnosed as a Mediastinal Tumor and Resected by Robotic Surgery.

A 55-year-old woman with no significant medical history or symptoms was incidentally diagnosed with a mediastinal tumor during a routine health checkup. The intraoperative findings of robot-assisted thoracoscopic surgery led to the diagnosis of extralobar pulmonary sequestration (EPS), with multiple vessels connecting to the pulmonary artery and superior pulmonary vein. EPS, an extremely rare condition, is typically supplied with blood from the aorta. Whereas it is uncommon for blood to be supplied from the pulmonary artery and to drain into the pulmonary vein in EPS, it is safely excised through robot-assisted thoracoscopic surgery.