Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patchy right mid-lung opacity silhouettes the right heart border , compatible with right middle lobe airspace infiltration . No diffuse pulmonary abnormality is present . The heart is of normal size . No pleural effusion or pneumothorax . No radiopaque foreign body . Osseous structures are unremarkable .
    OUTPUT:
    
Right middle lobe infiltrate , compatible with pneumonia , although other etiologies including hemorrhage could be considered in the appropriate clinical setting . Particularly given history of malignancy , follow - up radiograph is recommended to ensure resolution .