Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is subtle opacity projecting over the left lower lung , overlying the posterior left ninth rib . There is no definite correlate on the lateral although perhaps muscle mild increased density in the infrahilar region when compared to priors . Otherwise , the lungs are clear . There is no effusion , other region of consolidation or edema . Cardiac silhouette is top - normal . No acute osseous abnormalities .
    OUTPUT:
    
Vague left lower lung opacity with possible but no definite correlate on the lateral . This could represent infection in the proper clinical setting . Clinical correlation will be necessary and follow - up to document clearance radiographically will be necessary .