Duodenal Atresia- look for : premature baby, down syndrome, polyhydramnios on prenatal exam. Also search for other VACTREL associations as well as "double bubble " on CXR. ( ofcourse double bubble is not specific for duodenal atresia)
Meconium plugs- look for patients with history of : small left colon ( seen in infants of diabetic mothers), hirschprung disease, CF, maternal drug abuse.
Meconium Ileus- rule out cystic fibrosis.
Abdominal XR for meconium plugs and ilenus- multiple dilated loops of bowel, ground glass appearance in lower abdomen.
* corrections, additions are welcome !* Sorry for any errors