Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The prior exam , there is a new opacity at the left base , concerning for pneumonia or aspiration . No other opacity is identified . There is no pulmonary edema , pleural effusion , or pneumothorax . The mediastinal contours are normal . The heart is moderately enlarged , and unchanged in the prior exam . Changes from a prior CABG are noted . Sternal wires are intact . Again , there is extensive osteolysis of the distal left clavicle , right first rib , and left lateral ribs , similar to the prior exam . The left humerus is deformed , and unchanged from prior radiographs . This is consistent with an old fracture with significant callous formation .
    OUTPUT:
    
1 . New left lower lobe pneumonia or aspiration . 2 . Unchanged moderate cardiomegaly . 3 . Unchanged diffuse osteolytic process , as described above , of uncertain etiology , presumably malignant .