Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Vertical tubing coursing from the right neck to the mid abdomen , extending beyond the confines of the film . This could represent a VP shunt . Clinical correlation requested . Heart size at the upper limits of normal or slightly enlarged . Aorta is calcified and tortuous . There is upper zone redistribution and mild vascular plethora , but no overt CHF . possibility of diffusely increased interstitial markings can not be entirely excluded , though the appearance is similar to outside scanned - in radiographs from ___ . No focal infiltrate or gross effusion is identified . The
    OUTPUT:
    
Upper zone redistribution and mild vascular plethora could reflect mild CHF . Given diffusely increased interstitial markings , the possibility of an interstitial process can not be entirely excluded , but the appearance is similar to ___ . No focal pneumonic infiltrate or effusion . Apparent VP shunt .