Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since prior , there remains a large right pleural effusion with an air - fluid level suggesting a component of hydropneumothorax . Right perihilar mass is again seen . A retrocardiac nodule is redemonstrated . There is no left pleural effusion . Cardiomediastinal silhouette is unchanged .
    OUTPUT:
    
No significant change to large right pleural effusion with an air - fluid level suggesting a component of hydropneumothorax .