Proximal interruption of a main pulmonary artery with transpleural collateral vessels: CT and MR appearances

The plain chest radiographic, CT, and MR findings in a 31-year-old woman with proximal interruption of the right main pulmonary artery and transpleural collaterals are presented. The diagnosis can be established by both dynamic CT and MR. Intercostal collaterals and their transpleural connections are best demonstrated with dynamic CT.