RT Book, Section
A1 Perger, Lena
A1 Chen, Mike
A2 Kline, Mark W.
SR Print(0)
ID 1182907785
T1 Infantile Hypertrophic Pyloric Stenosis
T2 Rudolph's Pediatrics, 23e
YR 2018
FD 2018
PB McGraw-Hill Education
PP New York, NY
SN 9781259588594
LK accesspediatrics.mhmedical.com/content.aspx?aid=1182907785
RD 2024/04/20
AB Hypertrophic  pyloric  stenosis  (HPS)  is  a  condition  of  infancy  that  occurs  between  2  and  10  weeks  of  age,  most  commonly  between  3  and  6  weeks  of  age.  In  premature  infants,  it  presents  at  a  later  chronological  age,  but  earlier  postconceptional  age.  It  is  characterized  by  hypertrophy  of  the  circular  muscle  of  the  pylorus  causing  gastric  outlet  obstruction.  Its  incidence  is  1  to  5  per  1000  births  in  white  infants.  It  is  less  common  in  African  Americans  and  least  common  in  the  Asian  population.  It  is  more  common  in  boys  with  a  male:female  ratio  of  4:1.  Sharp  decreases  in  incidence  over  the  1990s  have  been  reported  from  several  European  countries,  while  the  incidence  in  the  United  States  appears  to  be  stable  but  varies  widely  by  state.