The microscopic study of diseased tissue (histology) is an additional procedure to many of our endoscopic examinations or biopsies. This reliably allows us to confirm a disease or dispel a suspicion. Combined with other clinical data, the severity of a disease can be established, which is very important for determining further therapy concepts. In this field we have collaborated for years with the group practice for pathology Dr. med. Hölzl und Dr. med. Eisenlohr.