Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Round opacity is seen in the right cardiophrenic angle and in the lower posterior lung on lateral view . No focal consolidation , pleural effusion or pulmonary edema is seen , and the cardiac and mediastinal contours are normal .
    OUTPUT:
    
Round opacity likely representing a pleural or extrapleural mass with a wide differential including fibroma versus malignancy . Recommend further imaging via CT or MRI for further characterization . Findings were entered into the critical results radiology dashboard on ___ at 17 :00 by Dr . ___ .