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[3 cases of diverticulum of the 4th duodenal segment].

Three cases of diverticulum of the IV duodenal portion are presented. The Authors, after having summarized the general features of the duodenal diverticula, remembered the rareness of the ones of its fourth portion, describe the clinical cases and conclude synthetizing the main indications to this type of surgery: complicated diverticula, certainly symptomatic diverticula, of great size diverticula.