Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: No focal consolidation is seen . There is blunting of the left costophrenic angle on the frontal view , not well appreciated on the lateral view which may be due to pleural thickening or atelectasis , however , very trace pleural effusion is not entirely excluded . No pneumothorax is seen . The cardiac and mediastinal silhouettes are unremarkable . No pulmonary edema is seen .
    OUTPUT:
    
Slight blunting of the left costophrenic angle may be due to pleural thickening or atelectasis , very trace pleural effusion not excluded , although not substantiated on the lateral view .