Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right IJ access dialysis catheter again noted with its tip in the region of the right atrium . Increased retrocardiac opacity raises concern for pneumonia . Findings appear progressed from prior exam . The heart size is stable . No pneumothorax or pleural effusion . Mediastinal contour unchanged . Hilar congestion again noted .
    OUTPUT:
    
1 . Retrocardiac opacity concerning for pneumonia . 2 . Hilar congestion .