Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi-upright radiograph of the chest demonstrates interval increase in retrocardiac opacity consistent with left lower lobe volume loss and small left - sided pleural effusion . Right lung is unchanged . Stable cardiomegaly . Endotracheal tube is again somewhat obscured by the spinal fixation device , but appears to be in unchanged position . A chest tube is seen projecting over the left hemithorax . Nasogastric tube is seen with the tip terminating in the stomach .
    OUTPUT:
    
Interval increase in retrocardiac opacity consistent with left lower lobe volume loss and small new left - sided pleural effusion .