Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: New expansile lytic lesion involving the seventh rib posteriorly . There is also deformity involving the sixth rib anterolaterally on the left and fourth right rib anteriorly . The lungs are unchanged in appearance . The cardiomediastinal silhouette is unremarkable . No pleural effusions or pneumothorax .
    OUTPUT:
    
Bilateral , multiple rib deformities . New expansile lytic lesion involving the right seventh rib posteriorly concerning for multiple myeloma .