Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded . There is increasing opacity in the right lateral mid lung field at the site of the prior chest tube , which likely represents fluid loculated within the major fissure . Cardiomediastinal silhouette is unremarkable . There is no pneumothorax or pleural effusion . Patient is status post gastric pull through with clips noted in the mediastinum .
    OUTPUT:
    
Increasing focal opacity in the right lateral mid lung field at the site of the prior chest tube , which likely represents loculated fluid within the fissure .