Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As seen on the prior CT from ___ , there is a mass - like opacity within the right middle lobe , measuring 3 .9 x 2 .9 cm , not significantly changed in size , allowing for differences in modality . This opacity is new compared to the most recent prior chest radiograph from ___ . Of note , this lesion demonstrated central hypoenhancement on the recent CT from ___ , suggestive of necrotic mass or abscess . The lungs are otherwise clear . The heart size is normal . The mediastinal contours are normal . There are no pleural effusions . No pneumothorax is seen .
    OUTPUT:
    
No significant change in 3 .9 cm mass or abscess in the right middle lobe , seen on CT from ___ . Findings were discussed with Dr . ___ by Dr . ___ at 8 : 20 a .m . via telephone on the day of the study .