Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: On the frontal view , there is faint opacity projecting over the left lung base which does not silhouette the left cardiac margin . On the lateral view there is increased opacity projecting over the spine anteriorly . While this finding can be seen in the setting of degenerative spine changes , it is more conspicuous when compared to previous exam from ___ . Cardiomediastinal silhouette is within normal limits . Hypertrophic changes are noted in the spine .
    OUTPUT:
    
Faint opacity at the left lung base which could represent pneumonia in the proper clinical setting .