<unk>  is classified into 3 types: * Type 1: the most common form of<unk> , making up 92% of cases. A web made of mucosa and submucosa obstructs the<unk>  lumen however there are no defects in the muscle coat. * Type 2: rarest form of<unk> , making up 1% of cases. The proximal and distal ends of the duodenum are atretic and separated but are connected by a cord (mesentery still intact). * Type 3: makes up 7% of<unk>  cases. The ends of the duodenum are atretic without any tissue attachment (mesentery defect).
Duodenal atresia
Annular pancreas
Intestinal atresia
Gastric atresia
Choanal atresia
Familial multiple intestinal atresia
Gastroschisis
Situs inversus