Endoscopic and Ultrasonographic Evaluation of Mediastinal Masses

The New England Journal of Medicine presents two videos on a cystic mediastinal mass. The first is an upper gastrointestinal endoscopy showing moderate luminal narrowing, extending to the gastroesophageal junction. The second is an endoscopic ultrasonography from the distal esophagus showing the internal complexity of the cystic mediastinal mass as a multiseptated lesion.