Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Hyperexpansion of the lungs is similar to prior . There is no focal consolidation , effusion , or pneumothorax . The cardiomediastinal silhouette is normal . Irregular density projecting over the left humerus is similar to ___ . No free air below the right hemidiaphragm is seen . Upper abdominal catheter is partially imaged .
    OUTPUT:
    
1 . No displaced rib fracture . 2 . Irregular density projecting over the left humerus may be superimposed from the skin .