Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a moderate right pleural effusion with overlying atelectasis . The left lung is clear . The cardiac and mediastinal contours are normal . The hilar structures are unremarkable . Degenerative changes of the cervical spine are better evaluated on the prior MRI .
    OUTPUT:
    
Moderate right pleural effusion with overlying atelectasis , pneumonia can not be excluded .