Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral views of the chest . There are diffusely increased interstitial markings seen throughout the lungs but no confluent consolidation . Blunting of the posterior costophrenic angle suggests small effusion , potentially on the left . Cardiomediastinal silhouette is upper normal limits . Median sternotomy wires and mediastinal clips are noted . Osseous and soft tissue structures are unremarkable .
    OUTPUT:
    
Increased interstitial markings throughout the lungs , potentially from chronic lung disease vs mild interstitial edema .