Confirmation of two novel loci for infantile hypertrophic pyloric stenosis on chromosomes 3 and 5.

Infantile hypertrophic pyloric stenosis (IHPS) is a multifactorial heritable condition affecting infants in the first 3 months of life. It is characterized by hypertrophy of the pylorus resulting in blockage of the pyloric canal. Patients present with projectile vomiting, weight loss and dehydration. Five susceptibility loci have been identified through genome-wide linkage analysis and candidate gene approaches. The first genome-wide association study was recently performed and three statistically significant associations identified. Here, we report our confirmation of two of these significant results thus providing further support for new loci for IHPS on chromosome 3p25.1 and chromosome 5q35.2.