Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A right - sided ventriculoperitoneal shunt is noted . Known left upper lobe mass is not clearly delineated on this study . There is however a new small to moderate left pleural effusion with adjacent opacity suggesting atelectasis . An overlying infectious process can not be excluded . A small opacity is noted overlying the right middle lobe . Cardiac and mediastinal contours appear stable . No acute fractures are identified .
    OUTPUT:
    
In this patient with a known left upper lobe mass , there is a new small left pleural effusion with adjacent atelectasis . Overlying infection in this region can not be excluded . Additionally , a faint opacity is noted over the right middle lobe . Further characterization may be obtained with a dedicated Chest CT .