Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Chest , PA and lateral . The lung volumes are low . There is a small left pleural effusion as well as a left lower lobe opacity which is likely atelectasis , but focal consolidation can not be fully excluded . The lungs are otherwise clear . There is no pneumothorax . The hilar and cardiomediastinal contours are normal . Pulmonary vascularity is normal .
    OUTPUT:
    
Small left pleural effusion and left lower lobe opacity , likely atelectasis though pneumonia not excluded .