Congenital hypertrophic pyloric stenosis

Congenital hypertrophic pyloric stenosis (CHPS) is a mechanical pyloric obstruction caused by pyloric ring muscle hypertrophy and hyperplasia, which narrows the pyloric lumen, and is one of the common diseases of newborns and infants. And mostly full-term children. The successful treatment of pyloric stenosis is one of the great achievements of surgery in this century. There are different incidences depending on geography, seasonality and ethnicity. The European and American countries are relatively high, about 2.5 to 8.8 permil; the Asian region is relatively low, and the incidence rate in China is 3permil; Most males, the ratio of male to female is about 4 to 5: 1, even as high as 9: 1. More common in the first child, accounting for 40 to 60% of the total number of cases.

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