TY - CHAP M1 - Book, Section TI - Duodenal Atresia and Stenosis A1 - Bianchi, Diana W. A1 - Crombleholme, Timothy M. A1 - D'Alton, Mary E. A1 - Malone, Fergal D. Y1 - 2015 N1 - T2 - Fetology: Diagnosis and Management of the Fetal Patient, 2e AB - Key PointsOften presents due to uterine size greater than the size of dates as a result of polyhydramnios.Characteristically diagnosed by ultrasound examination, which shows a “double bubble” sign.Differential diagnosis includes annular pancreas, malrotation, gastric or duodenal duplication, and preduodenal portal vein.Associated with trisomy 21 in 30% of cases. Amniocentesis should be performed.Associated with congenital heart disease in 17% to 33% of cases. Echocardiography should be performed.Polyhydramnios rarely develops before 24 weeks’ gestation but can contribute to preterm labor.Delivery should occur in a tertiary center with pediatric surgical and neonatal expertise available. SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/10/03 UR - obgyn.mhmedical.com/content.aspx?aid=1106399116 ER -