Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A chest tube has been advanced somewhat and projects over the right hemithorax appropriately . There is an abrupt turn at the side hole marker . This examination depicts a trace pleural effusion on the right , but a small pneumothorax is no longer apparent . A small quantity of subcutaneous emphysema is noted . The left lung remains clear . The cardiac , mediastinal and hilar contours appear stable .
    OUTPUT:
    
Small pleural effusion which was not apparent on the most recent prior examination none with the same technique . This appearance could represent some accumulating pleural effusion noting the setting of recent active bleeding although it is possibly due to repositioning of fluid .