The condition more common in children than in adults. It strikes about 2,000 infants (one in every 1,900) in the United States in the first year of life. Its incidence begins to rise at about one to five months of life, peaks at four to nine months of age, and then gradually declines at around 18 months.<unk> occurs more frequently in boys than in girls, with a ratio of approximately 3:1. In adults,<unk> represents the cause of approximately 1% of bowel obstructions and is frequently associated with neoplasm, malignant or otherwise.
Intussusception 
Pyloric stenosis
Meckel's diverticulum
Vesicointestinal fistula
Enterocele
Meconium peritonitis
Rectal foreign body
Intestinal malrotation