Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided vagal nerve stimulator is again seen . The cardiac and mediastinal silhouettes are stable . There is no definite focal consolidation . No large pleural effusion is seen . There is slight blunting of the left costophrenic angle which may be due to overlying soft tissue although a trace pleural effusion would be difficult to exclude . No pneumothorax is seen .
    OUTPUT:
    
Slight blunting of the left costophrenic angle which may be due to overlying soft tissue although a trace pleural effusion would be difficult to exclude . Otherwise , no significant interval change .