Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Combi tube balloon seen posterior to the trachea , and of uncertain location . The heart is massively enlarged . Increased opacification of the right greater than left hemithorax , likely represents a layering pleural effusion . No focal consolidations seen . No evidence of pneumothorax .
    OUTPUT:
    
Combi tube balloon inflated posterior to the trachea , and of uncertain location . Massive cardiomegaly and large layering right pleural effusion .