Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well - expanded . In the right upper lobe , there is a subtle hazy opacity , worrisome for developing atypical or viral pneumonia . The heart is mildly enlarged . There is no pleural effusion , pulmonary edema , or pneumothorax .
    OUTPUT:
    
Findings suggestive of developing atypical or viral pneumonia in the right upper lobe . Mild cardiomegaly .