Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: In comparison with study from ___ , the NG - tube extends into the stomach . Side port is not well - visualized . The tracheostomy remains in place . Cardiomediastinal silhouette is stable . Previously seen retrocardiac opacity and interval development of a left lower lung opacity could represent pneumonia versus worsening atelectasis . In order to assess for free air under the diaphragm , an upright or left lateral decubitus views recommended .
    OUTPUT:
    
1 . The enteric tube terminates in the stomach . Side port is not well - visualized . 2 . Retrocardiac and left lower lung opacity could represent pneumonia versus worsening atelectasis . 3 . In order to assess for free air under the diaphragm , upright or left lateral decubitus views recommended .