Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with earlier the same day , I doubt significant interval change . Again seen is cardiomegaly , upper zone redistribution , and increased interstitial markings , including focally more pronounced areas in the left mid and lower zones and in the right cardiophrenic region . As before , it is uncertain whether these represent acute or chronic findings and whether they represent a a single process alone or a process superimposed on some background interstitial changes . The potential differential includes background scarring , interstitial edema , inflammatory infectious processes . The presence of more confluent opacity at the left mid-zone makes it difficult to exclude an acute pneumonic infiltrate .
    OUTPUT:
    
Increased interstitial markings , with focally pronounced areas in left mid zone and both bases , similar to a film obtained earlier the same day . The possibility of a focal pneumonic infiltrate can not be excluded .