Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to prior chest radiograph from ___ , there is increased density of a left perihilar opacity and there is reaccumulation of left pleural effusion . Right lung is clear . There is no evidence of pneumothorax . Cardiomediastinal and hilar contours are unchanged . Sternotomy and mediastinal clips are intact .
    OUTPUT:
    
1 . Increased density of left perihilar opacity , concerning for pneumonia . 2 . Reaccumulation of left pleural effusion , no pneumothorax . These findings were discussed with Dr . ___ by Dr . ___ via telephone on ___ at 2 :58 p .m . , at the time of discovery .