Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Severe dextroscoliosis of the thoracic spine distorts the mediastinum which is otherwise unremarkable . There is stable if not decreased size of the cardiac silhouette . Lungs are clear . The right pulmonary artery is enlarged . No pleural effusion or pneumothorax present .
    OUTPUT:
    
Persistent though decreased cardiomegaly . Mildly enlarged right pulmonary artery . Clear lungs .