Multislice spiral CT of left pulmonary artery sling with tracheobronchial anomaly

Abstract

Objective To discuss the value of MSCT in diagnosis of left pulmonary artery sling (LPAS) with tracheobronchial anomaly.Methods MSCT was performed in 9 children with LPAS and tracheobronchial anomalies,CT findings were analyzed retrospectively. Results According to the Wells classification of LPAS,which includes two main types and two subtypes,there were 2 patients of type 1A,3 patients of type 1 B,2 patients of type 2A and 2 patients of type 2B.All of children had tracheobronchial stenosis.Local tracheobronchial stenosis was found in 4 patients ( all were type 1 ) and long tracheobronchial stenosis in 5 patients ( 1 patient with type 1 and 4 patients with type 2).Conclusions MSCT is an ideal imaging modality for simultaneously identifying LPAS and associated tracheobronchial anomalies.The Wells classification is very useful for operation planning. Key words: Pulmonary artery; Cardiovascular abnormalities; Tracheal stenosis ; Tomography,X-ray computed