Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest . Again seen are retrocardiac opacities , which are unchanged . This may represent pneumonia in a correct clinical setting . No other focal consolidations are seen . No pneumothorax or pleural effusion . The cardiomediastinal and hilar contours are normal .
    OUTPUT:
    
Unchanged left retrocardiac basilar opacities , which may represent pneumonia . Recommend follow - up to resolution .