Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a small right pleural effusion . A lung nodule in the left lower lobe measures 8 mm . There is no focal consolidation , overt pulmonary edema or pneumothorax The cardiac and mediastinal contours are normal . There is no free air beneath the right hemidiaphragm .
    OUTPUT:
    
Small right pleural effusion . No pulmonary edema . A left pulmonary nodule represents known metastatic disease that is better characterized on the prior CT .