Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a new large right pleural effusion with fluid seen tracking along the minor fissure . Heart size is difficult to evaluate given the effusion , however is likely normal . The left hilar contour is unremarkable . The right lung apex and left lung are grossly clear . There is no pneumothorax .
    OUTPUT:
    
New large unilateral right pleural effusion . Differential includes parapneumonic effusion , hemothorax or malignant effusion .