Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a persistent opacity projecting over the spine in the lateral projection which remains concerning for lower lobe pneumonia . However , the right lung base appears clear on the current frontal projection and there is increased opacification of the left base with a new small left pleural effusion . Findings likely reflect ongoing left lower lobe pneumonia . No pulmonary edema is identified . Cardiomediastinal and hilar contours are within normal limits .
    OUTPUT:
    
Left lower lobe pneumonia with new small left pleural effusion . Previously seen opacity within the right lung base is no longer evident .