Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a prominent area of increased opacity at the left lung base , with increased retrocardiac density and obscuration of the left hemidiaphragm , compatible with left lower lobe collapse and / or consolidation . There is probably also an associated small to moderate size left pleural effusion . There is minimal atelectasis at the right lung base , but the right lung is otherwise grossly clear . No gross right effusion . Cardiomediastinal silhouette is partially obscured , but appears similar to ___ . No CHF .
    OUTPUT:
    
Left lower lobe collapse and / or consolidation and probable left pleural effusion . The findings are concerning for pneumonic infiltrate at the left lung base .