Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lower lungs though poorly assessed due to underpenetration . A retrocardiac opacity on the lateral projection raises potential concern for an early left lower lobe pneumonia . Otherwise lungs appear clear . No large effusion or pneumothorax . There may be mild hilar congestion though there is no frank edema . Cardiomediastinal silhouette is stable . Previously noted left IJ central venous catheter is been removed . Bony structures are intact . Chronic rib deformities again noted .
    OUTPUT:
    
1 . Retrocardiac opacity , question early left lower lobe pneumonia . 2 . Possible mild hilar congestion .