Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to prior CT there is likely worsening pleural effusion at the left base . The remaining lung fields are clear . Heart size is normal . There is no pneumothorax . Right Port - A - Cath is stable in configuration terminating in the mid to low SVC .
    OUTPUT:
    
Worsening left pleural effusion with associated compressive lower lobe atelectasis . Underlying pneumonia can not be excluded in the right clinical setting .