Risk factors

Extrinsic/Extra mural factors

Abdominal wall Hernias

Intra abdominal adhesions

Abdominal malignancies

Intraluminal factors

Gallstone impaction

Ileus

Ingested foreign body

Faecal impaction

Intrinsic/Mural factors

Inflammatory stricture

Intussusception

Diverticular strictures

Meckel’s diverticulum

Lymphoma