<unk>  is defined as reduction in intestinal motility, which is either due to an obstruction (mechanical<unk>  or due to intestinal paralysis (functional<unk> . Reduction or cessation of intestinal peristalsis prevent effective transmission of intestinal content leading to constipation and abdominal distension. Nevertheless, onset and severity of symptoms depend on extent and location of obstruction in mechanical<unk> . Although proximal obstructions are presented acutely with nausea, vomiting, abdominal pain and obstipation, distal involvements usually take longer to become symptomatic. It is critical to differentiate two types of<unk>  and determining the etiology when encountering a suspected patient, since different approaches are available for each. Surgical intervention is usually recommended for treatment of mechanical obstructions, specifically complete obstructions, whereas conservative management which has been effective in management of functional<unk>  and some of partial mechanical obstruction cases.
Ileus
Gallstone ileus
Ileitis
Chronic cholecystitis
Fecaloma
Acute cholecystitis
Pancreatic fistula
Acute pancreatitis