[Intralobal sequestration in children--a new concept from the form of bronchial tree in sequestrated lung].

Twenty cases of the intralobal sequestration of the lung in children have been experienced. The age of the patients were from eleven days to fifteen years. Intralobal sequestration was classified into two groups, (central type and peripheral type) by the way of reconstruction of the bronchial tree in the sequestrated lung. In 8 cases of central type, the site of lesion was variable. The bronchial trees of the sequestrated lung were running toward the hilus of the normal lung but the bronchi of the affected area in the normal lung were absent. The aberrant arteries were muscular in histology, and the drainage veins were pulmonary vein. In 12 cases of peripheral type, the lesion was in segment 10 area in every cases. The bronchial trees of the sequestrated lung were running toward the pulmonary ligament where an aberrant artery came from, and B10 of the normal lung were patent. The aberrant arteries were elastic in histology, and the drainage veins were pulmonary and/or azygos vein. It is conceivable that the peripheral type is the real intralobal sequestration and the central type is the mixture of some other diseases.