Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is increasing density in left base with silhouetting of left hemidiaphragm . The left costophrenic sulcus is blunted . Other parenchymal densities bilaterally have not changed significantly . There is probably a small right pleural effusion . The heart is enlarged peer . The osseous structures are normal for age .
    OUTPUT:
    
Increasing left basilar density likely representing pleural and parenchymal disease . Although the findings could be due to atelectasis , pneumonia should be considered . Cardiomegaly Probable small right pleural effusion