Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest demonstrate mild asymmetry at the right lung base compared to the left . This may represent overlying breast shadow although in the right clinical situation , pneumonia can not be ruled out . There is no evidence of vascular congestion or interstitial edema . No pleural effusions are identified . No pneumothorax is seen . The heart , mediastinum , and hilar contours are normal .
    OUTPUT:
    
Mild opacification at the right base which may , in the right clinical situation , represent pneumonia . No evidence of pulmonary edema .