Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient has a known right middle lobe lung lesion which appears unchanged from the prior radiographs . There is a loculated right pleural effusion , partially assessed on the PET - CT from ___ . However , the overall size appears to have increased . The patient is status post median sternotomy , mitral and aortic valve replacements . The left lung is essentially clear .
    OUTPUT:
    
Unchanged right middle lobe mass . Loculated right pleural effusion , appears increased .