Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The main right pulmonary artery contours appear somewhat prominent and increased . The cardiac , mediastinal and hilar contours appear otherwise stable . There is no pleural effusion or pneumothorax . The lungs appear clear .
    OUTPUT:
    
Suspected pulmonary arterial enlargement which appears new or increased ; it may be appropriate to consider an echocardiogram in follow - up . No evidence of pneumonia .