Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Subtle increase in opacity at the left lower lobe seen on the frontal view , not substantiated on the lateral view may be due to overlap of vascular structures , but in the appropriate clinical setting early consolidation is not excluded . The right lung is clear . There is no pleural effusion or pneumothorax . The cardiac and mediastinal silhouettes are unremarkable .
    OUTPUT:
    
Subtle small opacity in the left lower lobe on the frontal view , not substantiated on the lateral view , may be due to overlapping structures , but early / mild consolidation not excluded in the appropriate clinical setting .