Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is slight increased density in the retrocardiac region on the lateral projection . Additionally , there is prominence of the interstitial markings diffusely . Findings are concerning for pneumonia given the clinical history . There is no pulmonary vascular congestion or large pleural effusion . Cardiomediastinal and hilar contours are within normal limits . There is no pneumothorax .
    OUTPUT:
    
Basilar consolidation with diffuse reticular opacities , findings concerning for pneumonia . Recommend follow - up chest radiograph following treatment to assess for resolution .