[A case report of pulmonary sequestration (Pryce I) associated with incomplete lobulation of the left lung].

A 28-year-old man was treated surgically for pulmonary sequestration of Pryce type I associated with incomplete lobulation of the left lung. His chief complaint was hemoptysis. His chest X-ray film showed a mass lesion behind the cardiac shadow. Aortogram revealed a large artery arising from the descending aorta and supplying the left basal segment, and venous blood returning into the left inferior pulmonary vein. The left basal segment had no pulmonary arteries. A bronchogram showed no defects in the bronchial tree. The left basal segment was resected successfully. Histological study showed the trunk of the aberrant artery to be elastic. Differences between histological types of aberrant arteries in pulmonary sequestration of Pryce type I and the pathogenesis of intralobar sequestration were discussed.