Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is left - sided perihilar and mid lung opacity which is new since prior . Right lung is grossly clear . There is no edema or effusion . Cardiomediastinal silhouette is stable compared to prior CT . No acute osseous abnormalities . Surgical clips seen in the upper abdomen .
    OUTPUT:
    
Left perihilar consolidation which could represent infection . Followup after treatment , if indicated , is suggested . If infection is not clinically suspected , CT scan should be considered to further evaluate .