Extralobar sequestration with a pulmonary arterial feeding vessel.

Extralobar sequestrations are rare congenital malformations of the lung. They are usually located between the diaphragm and left lower lobe and receive their blood supply from the aorta. We report a case of extralobar sequestration in an atypical location with a pulmonary arterial feeding vessel. An 18-year-old woman presented with an abnormality on chest X-ray. Chest computed tomography revealed a lung field not communicating with the bronchus between the upper and lower right lung lobes. Three-dimensional reconstruction computed tomography demonstrated a feeding artery from the pulmonary artery draining into the pulmonary vein. We diagnosed her with extralobar sequestration and resected the sequestered lung using video-assisted thoracic surgery. Therefore, three-dimensional reconstruction computed tomography helped identify the abnormal blood vessels, and video-assisted thoracic surgery may be useful in the treatment of extralobar sequestration.