Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Large expansile skeletal metastasis involving the posterior aspect of the left sixth rib seen on CT dated ___ is again seen overlying the left upper chest . Left PICC line is seen make an abrupt turn at the region of the azygos vein . Cardiomediastinum is unchanged compared to prior . There is mild increase in vascular congestion . No pleural abnormality is seen .
    OUTPUT:
    
Left PICC line makes an abrupt turn at the region of the azygos vein , repositioning is advised .