Table 1.

Types of ileal atresia.¹⁰

Types	Description
I	A thin diaphragm that occludes the lumen
II	Two blind ends are connected with a fibrous cord of atretic bowel
IIIa	(Most common), two blind ends terminate with a V-shaped mesenteric defect
IIIb	(Apple-peel or Christmas-tree atresia), involves a large, V-shaped mesenteric defect in which a blind-ended bowel distal to the atresia is wrapped around its collateral blood supply
IV	Defined as multiple atresia