Home > Gastroenterology > Zenker's Diverticulum Get the Flash Player to see this player. Rate: (Click the stars to rate) Published on Jul 20, 2009 by TBaron, Views: 4237 Zenker's Diverticulum: Dr. Todd Baron, a gastroenterologist at the Mayo Clinic, discusses the endoscopic treatment of Zenker's Diverticulum. Zenker's diverticulum is an outpouching of the upper esophagus. Symptoms include difficulty swallowing, that is progressively worse. Treatment is usually surgical, but newer endoscopic treatments are possible.