TY - CHAP M1 - Book, Section TI - Fetal Gastrointestinal Anomalies A1 - Volpe, Paolo A1 - Fanelli-Carmela, Tiziana A1 - Paladini, Votino-Dario A1 - Robertis, Valentina De A1 - Rembouskos, Georgios A2 - Fleischer, Arthur C. A2 - Abramowicz, Jacques S. A2 - Gonçalves, Luis F. A2 - Manning, Frank A. A2 - Monteagudo, Ana A2 - Timor, Ilan E. A2 - Toy, Eugene C. PY - 2017 T2 - Fleischer's Sonography in Obstetrics and Gynecology: Textbook and Teaching Cases, 8e AB - Key TermsAtresia: derives from Greek α-τρησία which means absence of perforation. In gastrointestinal atresia there is interruption of the lumen continuity at some point of the gastrointestinal “tube,” with eventual dilation of the proximal blind end. The most frequent gastrointestinal atresias are represented by esophageal, duodenal, jejunal, and anal atresia.Omphalocele and gastroschisis: they both derive from Greek ομϕαλο-κήλη and γαστρο’-σχισιç, which respectively mean “protrusion (of an intra-abdominal structure) through the umbilical cord insertion” and “tear of the abdominal wall.” In both cases, it results in herniation of parts of the gastrointestinal structures through the fetal abdominal wall. In omphalocele the herniated structures are covered with the peritoneum and the umbilical cord’s amnion. In gastroschisis, the herniated structures are in direct contact with the amniotic fluid.Physiologic herniation of the bowel: normal process in which a loop of the midgut herniates into the proximal part of the umbilical cord (physiologic exomphalos) due to the relatively reduced intra-abdominal space, usually from 7th to 11th week of gestation. At around 11 menstrual weeks the midgut has completely reentered into the fetal abdomen. SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/03/28 UR - obgyn.mhmedical.com/content.aspx?aid=1151034260 ER -