[Bronchopulmonary sequestration and pseudosequestration]

Abstract

Bronchopulmonary sequestration is a rare congenital anomaly in which part of the pulmonary tissue is detached from the normal lung without normal connection with tracheobronchial trees and pulmonary artery. It is supplied by anomalous systemic artery. Pseudosequestration is referred as the combination of systemic arterial supply to lung with normal bronchial connection and coexistent infection. It is presumed that chronically inflamed lung may activate neovascularization from systemic circulation in this strage, we reported 15 cases of all pulmonary sequestration and 1 case of pseudosequestration. Most of the cases were young adults with the mean age of 24.6 years old. The intralobar type comprised 86.6% of all cases. In 84.6% of the cases, the aberrant artery originated from the thoracic aorta. Preoperative diagnosis was gained in 47% of cases. In 80% of all cases, the chest mainly characterized with homogeneous mass lesion or cyst(s) with air-fluid level. The distinction between sequestration and pseudosequestration is a diagnostic challenge because the radiologic findings are similar between both conditions. There are clinically significant complications, such as recurrent infections or massive bleeding during operation.