Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mediastinum is widened and is more than expected status post bisegmentectomy concerning for substantial mediastinal hemorrhage with indentation of the left tracheal wall contour . Patient is status post left upper lobe bisegmentectomy with left chest tube in place . Bilateral low lung volumes . No pneumothorax . Pleural effusions little if any . Cardiac size appears enlarged and likely is exaggerated by low lung volumes .
    OUTPUT:
    
Mediastinal widening more than expected given procedure , concerning for substantial mediastinal hemorrhage . Left chest tube in place with no pneumothorax .