Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate interval placement of a single - lead left chest pacemaker . Surgical clips following right radical mastectomy are again seen . There is blunting of the right costophrenic angle which is chronic and the result of scarring . Right apical opacity is also chronic appearing and unchanged . In the upper left lung , there is a new opacity which measures approximately 12 mm . The heart size is normal , the mediastinal contours are unremarkable .
    OUTPUT:
    
1 . New left upper lobe opacity . Recommend further evaluation with chest CT in this patient with a history of cancer . 2 . Post - surgical changes of radical right mastectomy with pleural scarring , stable in appearance . 3 . Interval placement of left chest single - lead pacemaker , in appropriate position . These findings were paged to resident ___ at 2 : 15 p .m .