Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest are compared to previous exam from ___ . There is left basilar opacity compatible with pleural effusion with underlying atelectasis and consolidation is also possible . Linear opacity at the right lung base is most suggestive of atelectasis . Superiorly , the lungs are clear . Cardiac silhouette is difficult to delineate given left base opacity . Degenerative changes are noted in the spine .
    OUTPUT:
    
Left - sided pleural effusion with underlying atelectasis and possible underlying consolidation . Clinical correlation suggested . Probable right basilar atelectasis .