Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Port - A - Cath catheter tip is at the level of lower SVC . Heart size and mediastinum are unchanged including cardiomegaly . Peripheral interstitial opacities have increased slightly on the right . The left peripheral interstitial opacities are stable . The lung volumes are stable and mildly reduced . The patient appears to be after transcatheter aortic valve replacement . No pleural effusions or pneumothorax .
    OUTPUT:
    
Progressive peripheral interstitial opacities since ___ can be active flare of interstitial lung disease including fibrotic NSIP or drug toxicity , versus superimposed infection in the appropriate clinical setting .