Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were viewed . The cardiac silhouette remains moderately enlarged . Mediastinal and hilar contours are unchanged with severe enlargement of the main pulmonary artery . There is no pneumothorax . A fluid collection in the left lung base projects posteriorly on the lateral view and is new since the prior study . Consolidation in the superior segment of the left lower lobe is also new . Surgical clips projecting over the right mid lung zone may relate to overlying breast tissue .
    OUTPUT:
    
Fluid collection in the left lower chest post procedure , which may reflect an infectious process . Consolidation in the superior segment of the left lower lobe may represent pneumonia .