Symptoms:
- Upper abdominal swelling may or may not be present
- Early vomiting of large amounts, which may be greenish (containing bile)
- Continued vomiting even when infant has not been fed for several hours
- Absent urination after first few voidings
- Absent bowel movements after first few meconium stools
Signs and tests:
A fetal ultrasound may show polyhydramnios (excessive amounts of amniotic fluid in the uterus) or swelling of the stomach and part of the duodenum.
An abdominal x-ray may show air in the stomach and first part of duodenum, with no air beyond that.