RT Book, Section A1 Bianchi, Diana W. A1 Crombleholme, Timothy M. A1 D'Alton, Mary E. A1 Malone, Fergal D. SR Print(0) ID 1106399077 T1 Pyloric Atresia and Stenosis T2 Fetology: Diagnosis and Management of the Fetal Patient, 2e YR 2015 FD 2015 PB McGraw-Hill Education PP New York, NY SN 978-0-07-144201-5 LK obgyn.mhmedical.com/content.aspx?aid=1106399077 RD 2024/09/12 AB Key PointsCondition presents only rarely antenatally.Incidence of pyloric atresia is 1 in 1 million livebirths. Hypertrophic pyloric stenosis occurs in 1.5–4 per 1000 livebirths.Usually associated with polyhydramnios and a “single bubble.”Differential diagnosis of a dilated fetal stomach includes duodenal atresia or stenosis, malrotation with midgut volvulus, duodenal duplication, and antral duplication.Pyloric atresia can be associated with epidermolysis bullosa, a serious and often fatal skin condition that has autosomal recessive inheritance.Delivery should occur in a tertiary center with pediatric surgical, dermatologic, and genetic expertise present.