Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette size is normal . The mediastinal and hilar contours are unremarkable . Pulmonary vasculature is normal . No focal consolidation , pleural effusion or pneumothorax is present . 1 cm vague nodular focus is demonstrated projecting within the left mid lung field , at the confluence of the left anterior 5th rib and the left posterior 8th rib , not clearly visualized on the prior exam . There are no acute osseous abnormalities .
    OUTPUT:
    
1 cm nodular opacity projecting over the left mid lung field , at the confluence of the left ___ anterior rib and left ___ posterior rib . This could reflect a confluence of shadows , but a pulmonary nodule can not be completely excluded . Oblique views with nipple markers are recommended for further assessment . No radiographic evidence for pneumonia .