Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi-upright radiograph of the chest demonstrates persistent , although stable , widening of the mediastinum . There is a small left - sided pleural effusion with adjacent atelectasis which is unchanged from the prior study . Right lung is clear . There is no pneumothorax . Enteric feeding tube is seen coiled in the stomach . Left - sided internal jugular central venous line ends at the upper SVC . The ET tube is above the upper margin of the clavicles , measuring 6 cm from the carina . Bilateral thoracostomy tubes are in unchanged position .
    OUTPUT:
    
1 . Stable - appearing wide mediastinum . 2 . Small left - sided pleural effusion with adjacent atelectasis , unchanged from the prior study . 3 . Endotracheal tube is above the upper margin of the clavicles , measuring 6 cm from the carina , and should be advanced 2 cm for more secure seating .