Failure to pass meconium within 48 hrs of bih in a newborn with no obvious external abnormality should lead to the suspicion of-
Anal atresia
Congenital pouch colon
Congenital aganglinosis
Meconium ileus
Ans. is 'c' i.e., Congenital aganglinosis o Read what Nelson says about Hirschsprung's disease (Congenital aganglinosis). o "Ninety nine percent of full term infants pass meconium within 48hrs of bih. Hirschsprung disease should be suspected in any full term infant with delayed passage of stool".