Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate left PIC catheter tip projecting over distal SVC . No pneumothorax . Lung volumes are normal . No focal consolidation , pleural effusion . No pulmonary edema . Hilar and mediastinal silhouettes are unremarkable . Heart size is normal . Patient is status post medial sternotomy . 2 .5 cm density projecting in the subcutaneous tissues of the back without definete connection to the spinal ___ , ___ ___ a foreign object .
    OUTPUT:
    
1 . Left PIC catheter tip projects over distal SVC . 2 . A 2 .5 cm density in the subcutaneous tissues of the back ___ represent a foreign body , correlate clinically and prior imaging .