Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left lung nodule is present and better evaluated on prior CT . Adjacent linear scarring is present Ventriculoperitoneal shunt is seen to course through the right hemithorax and into the abdomen . Atelectasis and scarring is seen at the bilateral bases as well as persistent elevation of the left hemidiaphragm . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Left lung nodule . No acute process .