Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right middle lobe opacity is worrisome for pneumonia . Patchy left base opacity could be due to atelectasis or pneumonia . Right hilar mass and pulmonary nodules better delineated on prior CT . Slight blunting of the left posterior costophrenic angle may be due to pleural thickening , atelectasis , or a trace pleural effusion . The cardiac and mediastinal silhouettes are stable .
    OUTPUT:
    
Right middle lobe opacity worrisome for pneumonia versus spread of disease . Hilar or mass and pulmonary nodule seen on prior CT , better assessed on CT . Patchy left base opacity could be due to atelectasis or pneumonia .