Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient has had prior right mastectomy with axillary dissection . The moderate right pleural effusion has decreased , revealing an airspace opacity at the right base , which is likely due to fluid in the fissure . The known right apical nodule is unchanged . The left lung is clear . The partially imaged distal aspect of a right groin porta cath is unchanged , it s tip in the right atrium .
    OUTPUT:
    
Interval decrease in moderate right pleural effusion . No other significant interval change .