Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest are compared to previous exam from ___ and older previous exam dating back to ___ . Indistinct pulmonary vascular markings are seen throughout with increased interstitial markings without confluent consolidation . Region of scarring is seen in the left upper lung stable dating back to ___ . There is increased opacity projecting over the right hilum , which appears distinct from the pulmonary artery , however , remains stable in configuration dating back to ___ . There is no pleural effusion . Cardiomediastinal silhouette is enlarged but stable . Median sternotomy wires and mediastinal clips again noted . Osseous and soft tissue structures are unremarkable .
    OUTPUT:
    
Increased interstitial markings throughout the lungs which may be from mild failure . No confluent consolidation . Stable opacity projecting over the right hilum dating back to ___ .