Neonatal duodenal obstruction.

The records of 40 infants with intrinsic duodenal obstruction have been reviewed. Of these more than half had no bile in the vomit. Persistent vomiting had been considered as the major factor of doubt regarding duodenal obstruction. The incidence of other associated congenital abnormalities was 70%. The over all mortality rate was 42.5%. The association of mongoloidism to the intrinsic duodenal obstruction was found approximately in every third infant. The low birth weight without other congenital abnormality has very little effect on the mortality rate.