Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest . Left chest wall Port - A - Cath is again seen with the catheter tip projecting over the mid SVC . There is increased density projecting over posterior costophrenic angle likely lateralizing to the left . The lungs are otherwise clear of focal consolidation or effusion . The cardiomediastinal silhouette is within normal limits . Old healed right lateral rib fractures are identified .
    OUTPUT:
    
Increased density at the left lung base could represent atelectasis or scarring however infection is not completely excluded .