Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . There is blunting of the left costophrenic angle which may be due to pleural thickening / scarring versus a trace pleural effusion . Otherwise , no definite effusion is seen on the lateral view . There is no focal consolidation . No overt pulmonary edema is seen . No evidence of pneumothorax . The cardiac and mediastinal silhouettes are unremarkable . Bilateral nipple shadows are incidentally noted .
    OUTPUT:
    
Blunting of the left costophrenic angle , of uncertain acuity , could be due to pleural thickening / scarring versus a trace pleural effusion .