Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal silhouette is stable . A left ventricular pacing lead is unchanged in position . There is no pleural effusion or pneumothorax . There is increase opacification at the right medial lung base obscuring the right hemidiaphragm , new from prior .
    OUTPUT:
    
Increased opacity at the right lung base obscuring the medial right hemidiaphragm , concerning for a a right lower lobe pneumonia .