Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest . There is ill - defined opacity in the right mid lung adjacent to the hilum which likely projects in the retrosternal region on the lateral view . Elsewhere , the lungs are clear . The cardiomediastinal silhouette is within normal limits . No acute osseous abnormalities detected .
    OUTPUT:
    
Subtle opacity in the right mid lung . This could represent pneumonia in the proper clinical setting . Please correlate with patient 's history and potentially prior imaging given patient 's presumed history of malignancy . Repeat after treatment if administered is recommended to document resolution . Otherwise , cross - sectional imaging could be performed earlier .