According to a 1984 study conducted in Maryland,<unk>  appears in 18.6 per 100,000 live births. In Japan, it occurs at a similar rate of about one in 5,000 births (20 per 100,000). It is more common in male than female (4.32:1) and in white rather than nonwhite. Nine percent of the<unk>  cases were also diagnosed as having Down syndrome. Most cases are diagnosed before the patient is 10 years of age.
Hirschsprung's disease
Meconium
Retained antrum syndrome
Intestinal pseudo-obstruction
Hartnup disease
Necrotizing enterocolitis
Meckel's diverticulum
Intestinal malrotation