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Duodenal duplication is an extremely rare congenital abnormality that occurs mostly in children. It represents only 2% to 12% of all gastrointestinal tract duplication. Its clinical presentation is highly variable and non-specific making the positive diagnosis very difficult. Imaging modalities can help to detect the lesions making the diagnosis more accurate before surgery. Here, we report a case of duodenal duplication revealed by chronic abdominal pain and treated by surgical resection in a 26-year-old man. Even in adults, it is necessary to evoke the diagnosis of duodenal duplication in patients with unexplained abdominal pain. Surgical resection remains the treatment of choice and endoscopic treatment is reserved for selected patients in whom surgery is difficult.

In developed countries, authors have reported variations over time in the seat and histological type of gastric adenocarcinomas, which were explained by Helicobacter pylori infection (HPI) incidence changes. In North-African countries and the Arabic world, epidemiological changes in gastric adenocarcinomas are still unknown. Our study aims to explore and to describe those changes in central Tunisia.This is a retrospective observational and descriptive study including 876 cases based on the National Central Tunisian Register of Cancers over a period of 21 years. Two groups were formed and compared (group A: 337 patients from 1995 to 2005; group B: 539 patients from 2006 to 2015).HPI decreased from 32.6% in group A to 11.2% in group B (p0.05). Signet ring cell carcinomas increased in 2 decades from 14% in group A to 36% in group B (p0.05). Proximal cancers were 16.61% in group A and increased to 19.66% in group B (p = 0.3). Total gastrectomy rate was 10.4% in group A versus 23.2% in group B (p0.05).This study has shown a significant increase of signet ring cell carcinomas with a simultaneous decrease in HPI in the last decade in central Tunisia.