Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left subclavian approach Port - A - Cath tip terminates in the mid SVC . Heart size is normal . Cardiomediastinal silhouette and hilar contours are unremarkable . Lungs are clear . Mild blunting of the left costophrenic angle may reflect mild pleural thickening or trace pleural effusion . There is otherwise no large pleural effusion or pneumothorax .
    OUTPUT:
    
Trace left pleural effusion versus pleural thickening . Otherwise unremarkable .