Who is affected by pyloric stenosis

Pyloric stenosis occurs in 1 to 3 out of 1,000 babies.¹ It develops most often in those babies who:²

• Have family members who had pyloric stenosis. About 13 out of 100 babies with pyloric stenosis have a close family member who had the condition.
• Are male. Males are affected 4 times more often than females.

Citations

1. Wyllie R (2007). Pyloric stenosis and congenital anomalies of the stomach. In RM Kliegman et al., eds., Nelson Textbook of Pediatrics, 18th ed., pp. 1555–1558. Philadelphia: Saunders Elsevier.

2. Sondheimer JM (2007). Pyloric stenosis section of Gastrointestinal tract. In WW Hay Jr et al. eds., Current Pediatric Diagnosis and Treatment, 18th ed., pp. 607–608. New York: Lange Medical Books/McGraw-Hill.