Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded . Pulmonary vascular redistribution is unchanged from ___ . Mediastinal contour , hila , and cardiac silhouette are normal . . Small if any bilateral pleural effusions . Subtle focal opacity in the left lower lung likely corresponds to infectious focus identified on previous CT of the abdomen and pelvis from ___ .
    OUTPUT:
    
Subtle focal opacity in the left lower lung likely corresponds to infectious focus identified on previous CT of the abdomen and pelvis from ___ .