Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear unchanged . There is no shift of mediastinal structures . There is a large right - sided pleural effusion , which has increased since the earlier radiographs and perhaps slightly since the more recent CT . There is no pneumothorax . The left lung remains clear .
    OUTPUT:
    
Similar to increased right - sided pleural effusion , large in size . No evidence of pneumothorax .