Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is hazy opacification at the left base , which is likely atelectasis , although underlying infection can not be excluded . There is no edema , pleural effusion , or pneumothorax . The cardiomediastinal silhouette is normal . Anterior cervical spinal fusion hardware is present , although only partially evaluated on these images .
    OUTPUT:
    
Hazy opacification at the left base is likely atelecatasis , although an underlying pneumonia can not be excluded .