Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP view of the chest provided . There is near total opacification of the left lung , with residual right upper lobe aeration . There is no contralateral shift of mediastinal structures . Altogether , these findings are concerning for partially collapsed left lung that is most likely due to mucus plugging . There is additional moderate amount of layering pleural effusion on the left . Compared to prior study , the right juxta -hilar region opacity appears much worse , likely reflective of atelectasis however aspiration pneumonia is also certainly a possibility . There is a small to moderate amount of pleural effusion on the right .
    OUTPUT:
    
1 . Partial left lung opacification , concerning for subtotal left lung collapse that is most likely due to mucus plugging . 2 . Worsen right juxta - hilar opacity , likely atelectasis however aspiration pneumonia can not be excluded . 3 . Bilateral pleural effusions , left worse than right .