Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A small right pleural effusion is noted . The left lung is clear . The cardiomediastinal silhouette , hilar contours , and pleural surfaces are normal . No pneumothorax , pneumonia , or pulmonary edema .
    OUTPUT:
    
Small right pleural effusion . No radiographic evidence of metastatic disease .