Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar contours remain stable with moderate cardiomegaly . There may be a small left pleural effusion with a new small left basilar opacity . There is no pneumothorax or right pleural effusion . There is no new focal consolidation ; however , left basilar pneumonia is possible in the correct clinical setting .
    OUTPUT:
    
Left basilar opacity , new since the prior study , with possible small left pleural effusion which may be indicative of infection in the correct clinical setting .