Abstract
Of 55 infants with hypertrophic pyloric stenosis treated at our institution during the period from 1959 to 1981, three (5.45%) were low-birth-weight. They were all pre-term, appropriate for gestational age infants and two of them were female. Average age at onset was about 10 days later than full-term control patients and vomiting was not forcible in two. There was no relationship between the age of onset and the birth weight or gestational age. A patient died of respiratory distress after the operation. Hypertrophic pyloric stenosis is rare among low-birth-weight infants and presents atypical and milder clinical picture. It is very interesting that contrary to the full-term infants, the disease occurs predominantly in females in this group of patients.
