Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest provided . Aortic valve replacement noted on the lateral projection . Tiny clips project over the left upper chest . The previously noted lines and tubes have been removed . There is left lower lobe opacity which could represent consolidation / pneumonia and likely a small left pleural effusion . Right lung is clear . No overt signs of edema . Aortic calcification noted . Degenerative changes at both shoulders noted .
    OUTPUT:
    
Left basal opacity concerning for pneumonia and small left pleural effusion .