Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is ill - defined opacity in the left upper lobe . There has been interval resolution of the left lower lobe consolidation . Heart and mediastinal contours are within normal limits . No pneumothorax is seen . Biapical pleural thickening is present . Underlying emphysematous changes are noted .
    OUTPUT:
    
Left upper lobe pneumonia . Recurrent infection in an area that is chronically abnormal may be due to atypical mycobacterial infection . Findings discussed with Dr . ___ by Dr . ___ by telephone at 11 :30 p .m . on ___ at the time of discovery of these findings and at the time of wet read request . Additional diagnostic consideration of atypical mycobacterical infection was discussed with Dr . ___ by Dr . ___ by phone at 8 :03 a .m . on ___ after attending radiologist review .