<unk>  must be differentiated from other diseases that cause a failure to pass<unk>  or abdominal distension in infants, including small left colon syndrome, and congenital hypothyroidism.
Transient intestinal obstruction for 1-2 days after birth.
Obstruction is functional due to dilated colon and delayed passage of feces.
Usually seen in premature infants.
Reduced caliber of the colon starting from splenic flexure and going down, causing intestinal obstruction.
Characterized by a sudden change of the colon diameter.
Usually associated with gestational diabetes.
Failure to pass<unk>  due to failure of intestine recanalization.
Proximal lesions have an earlier onset of symptoms than distal lesions.
Colonic atresia may affect normal children or may be associated with other abnormalities as Hirschsprung's disease or gastroschisis.
Intestinal obstruction due to inspissation of<unk>  in the distal ileum.
Most cases of<unk>  ileus are secondary to cystic fibrosis.
Typically presents with failure to pass<unk>  and abdominal distension with or without vomiting.<unk>  ileus may first present with complications, including perforation and volvulus.
Most infants are born asymptomatic.
Symptoms, if present, may include, but not limited to:
Macroglossia
Hoarse cry
Umbilical hernia
Puffy facies
Increased head circumference
Hypothermia
Macroglossia
Hoarse cry
Umbilical hernia
Puffy facies
Increased head circumference
Hypothermia
Meconium plug syndrome
Meconium ileus
Meconium aspiration syndrome
Tracheoesophageal fistula
Hiatus hernia
Esophageal atresia
Achalasia
Laryngomalacia