Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Retrocardiac consolidation obscuring the left hemidiaphragm is concerning for pneumonia in the right clinical setting . The lungs otherwise clear . No pleural effusions or pneumothorax . Mild cardiomegaly and mediastinal contour are unchanged . Chronic right shoulder deformity is unchanged .
    OUTPUT:
    
Retrocardiac consolidation is likely left lower lobe pneumonia .