Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided demonstrate a left chest wall Port - A - Cath with tip in the low SVC . Lung volumes are low with linear opacity in the left lung base , most likely atelectasis . A tiny left pleural effusion would be difficult to exclude . Cardiomediastinal silhouette appears normal and stable . No pneumothorax or convincing signs of pulmonary edema . Bony structures are intact .
    OUTPUT:
    
Left basal atelectasis with possible tiny left pleural effusion . Otherwise unremarkable , though lung volumes are low .