Considerable attention is currently being paid to the diagnosis and treatment of gastric malformations complicated by its obstruction. This can be attributed to stable incidence of these disorders among other congenital anomalies of the gastrointestinal tract and no clear understanding of the causes and mechanisms underlying the development of this pathology. Gastrointestinal duplications are rare congenital malformations that differ significantly in their appearance, location, size, and clinical manifestations. Their incidence is 1 case per 4,500 autopsies. Duplications can be cystic and diverticular (tubular) and can be located in any part of the gastrointestinal tract from the root of the tongue to the anal canal. The small intestine is affected most frequently, while duplications of the rectum, duodenum, and esophagus are exceedingly rare. In this article, we report two cases of gastrointestinal duplications in children treated using surgery. Key words: neonate, obstruction, developmental malformations, gastric duplication, esophageal duplication, case report