Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs are well - expanded . On the background of coarse interstitial thickening , there is an opacity in the left lower lung which is more conspicuous than in the previous exam from ___ . There is also a new dense retrocardiac opacity as well as opacities in the left costophrenic angle partially obscuring the left hemidiaphragm margin . Layering left - sided effusion is present . There is no right sided effusion . There is no pneumothorax . The heart is not enlarged .
    OUTPUT:
    
Findings compatible with left lower lobe pneumonia and associated pleural effusion , worsened from ___ . Coarse interstitial markings may be a combination of chronic interstitial disease and mild interstitial edema .