Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . Smoothly marginated opacity at the right cardiophrenic angle is noted . The mediastinal and hilar contours otherwise are unremarkable and the pulmonary vascularity is not engorged . There is no focal consolidation , pleural effusion or pneumothorax . No acute osseous abnormalities seen .
    OUTPUT:
    
1 . Right cardiophrenic opacity is of unclear etiology , and could reflect a pericardial abnormality such as a pericardial cyst . An epicardial fat pad is considered less likely . Follow up chest CT is recommended for further evaluation . 2 . No focal consolidation to suggest pneumonia .