Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left ventriculoperitoneal shunt catheter is seen coursing along the lower left neck across the left hemithorax towards the abdomen . A slightly rounded nodular airspace opacity projects over the lower lobe on the lateral view and may represent an infectious process . Rounded atelectasis is not excluded . The right lung is relatively clear . Trace pleural fluid layers posteriorly on the lateral view . No pneumothorax is detected . The pulmonary vasculature is not engorged . The cardiac silhouette is enlarged but stable . There is prominence of the mediastinum due to unfolding of the thoracic aorta , which is unchanged . The trachea is midline .
    OUTPUT:
    
1 . Rounded nodular airspace opacity in the lower lobe concerning for infectious process . Followup PA and lateral radiographs are recommended in six to eight weeks following appropriate therapy to confirm resolution . 2 . Stable cardiomegaly .