Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to most recent study , there has been no significant interval change with a large left pleural effusion with adjacent compressive atelectasis . There may be some increased atelectasis due to leftward shift of mediastinal structure . There is fluid partially loculated within the left major fissure . There may be a tiny right pleural effusion as well . The right lung remains clear . The left heart border is obscured entirely . Mediastinal structures are otherwise unremarkable . A right chest Port - A - Cath is noted .
    OUTPUT:
    
Large partially loculated left pleural effusion with probable increase in atelectasis . Tiny right pleural effusion .