Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Prominent interstitial lung markings , are diffuse . Reticular opacities are noted at the left lung base . The cardiomediastinal silhouette is within normal limits . Osseous structures are unremarkable .
    OUTPUT:
    
1 . Reticular opacities at the left lung base may represent pneumonia , possibly aspiration . 2 . Diffuse interstitial lung markings may represent mild edema or atypical infection .