Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal in size . The mediastinal and hilar contours appear within normal limits . There is a moderate pleural effusion on the left with streaky retrocardiac opacity , probably compatible with associated atelectasis . However , projecting over the right lower lung , and probably in the right lower lobe , is a consolidative opacity for which pneumonia should be considered . There is no pneumothorax . A large rim calcified structure in the right upper quadrant suggests one or two large gallstones .
    OUTPUT:
    
Moderate left - sided pleural effusion . Widespread airspace disease in the right lower lung worrisome for pneumonia . Cholelithiasis .