Chronic anastomotic fistula are an expression of a complication after anastomoses caused by surgery. The cause of this is diverse and reaches from incorrect seam technology, over factors of the comorbidity up to the fateful process. All regions from the esophagus to the rectum and, in addition, the biliáry and pancreatic ducts can be affected. To evaluate the generál problém localization diagnostics are necessary, whereby different endoscopic, radiological and combining techniques are being appli-ed. The treatment of fistulas contains therapies of conservative, conservatively medicamentous over the Íntervention in endoscopic management up to the surgical treatment. In most cases the treatment of anastomotic fistula require an individual pati-ent-fair therapy; exceptions are the pancreatic fistula.

        Key words: anastomotic fistula - diagnostic and localisation - therapy