[Independent Occurrence of a Mediastinal Bronchogenic Cyst and an Intralobar Pulmonary Sequestration].

Here we describe a case of an 18-year-old boy who exhibited abnormal pulmonary parenchyma supplied by an aberrant artery from the descending aorta in the right lower lobe of the lung and a cystic tumor measuring 34×26×54 mm in the right upper mediastinum. Video-assisted thoracic surgery for resection of the 2 lesions showed that they were independent of each other. Final diagnosis of an intralobar pulmonary sequestration in the right lower lobe and a bronchogenic cyst in the upper mediastinum was made. In some reports, 2 lesions were described to be in close proximity to and connected with each other, but the present case is unique in that the 2 lesions were completely independent of each other.