Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest demonstrate areas of increased opacification of the right mid and lower lung , with effacement of the right heart border , concerning for right middle lobe and lower lobe pneumonia . However , underlying mass can not be excluded . There is a probable right - sided pleural effusion . Increased opacification of the left lung base probably represents atelectasis , although superimposed infection can not be excluded .
    OUTPUT:
    
Findigns as above raise concern for RML and RLL pneumonia with associated pleural effusion . However , underlying mass can not be excluded . Recommend follow - up imaging to assess for underlying mass once pneumonia has resolved .