Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were provided . No focal consolidation , effusion or pneumothorax is seen . Cardiomediastinal silhouette appears normal . The left sixth posterior rib appears irregular which corresponds with the site of known metastatic lesion on prior CT . A pathological fracture through this level has been seen on prior CT exams dating back to ___ . A lesion in the left lateral arch of the seventh rib is also noted with bulbous expansion at this level appearing grossly unchanged from prior CT . Additional osseous metastatic lesions are better assessed on the recent CT chest from ___ .
    OUTPUT:
    
Rib lesions on the left likely account for patient 's complaint of left lateral rib pain . A chronic pathological fracture involving the left sixth rib has been seen on multiple prior exams .