Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since the prior exam , the interstitial opacities have slightly worsened . Additionally , the basilar opacities have also progressed . There is no definite pleural effusion . There is no pneumothorax . The mediastinal contours are normal . The heart size is at the upper limits of normal .
    OUTPUT:
    
Worsening interstitial and basilar opacities , concerning for an atypical pneumonia , likely with a component of mild fluid overload .