Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left chest wall defibrillator has a single lead terminating in the right ventricle . The lungs are normally expanded despite a mild generalized interstitial abnormality . Peribronchial opacification in the right infrahilar lung could be pneumonia or the first expression of edema . The heart is mildly enlarged . The mediastinal and hilar contours are normal . Eversion of the diaphragmatic pleural surfaces is due to small effusions or pleural scarring . Pleural thickening or scarring at the right lung apex is mild .
    OUTPUT:
    
1 . Mild interstitial abnormality , chronicity indeterminate , given mild cardiomegaly , could be interstitial edema . 2 . Possible RLL pneumonia or early edema .