[Ileal duplication in adults. A very rare nosological entity].

The report presents a rare case of intestinal duplication in a 43-year old female. Intestinal duplication is a rare congenital malformation and is extremely exceptional in adults. A lot of etiopathogenic theories have been advanced to explain this malformation that can occur anywhere along the alimentary tract, even if the ileum remains the most common. It may be cystic or tubular. An important aspect of mucosal histology is the possibility of gastric heterotopy, conditioning a particular treatment. The literature shows 14 cases with clinical very different presentations and instrumental exams were rarely helpful for correct diagnosis. Treatment of choice is surgical complete resection of the duplication. When contiguous structures are involved intestinal bypass or Roux-on-Y anastomosis may be necessary with mandatory stripping of the mucosa when heterotopic gastric mucosa is present in order to prevent the risk of gastrointestinal haemorrhage or malignant transformation, an event possible in about 25% of the cases reported in the literature.