Abstract Gastroschisis is a result of a full-thickness paraumbilical (usually right-sided) defect that allows herniation of free-floating fetal bowel into the amniotic cavity. The worldwide incidence of gastroschisis is increasing,…

Abstract Hepatomegaly can occur in maternal diabetes, fetal infection, metabolic/storage disease, and in genetic syndromes. Structural fetal hepatic anomalies include tumors (usually primary, rarely metastatic), calcifications, cysts, and biliary anomalies….

Abstract Autosomal recessive polycystic kidney disease, also called infantile polycystic kidney disease, is a chronic, progressive condition that causes cystic dilatation of the renal collecting ducts and congenital hepatic fibrosis….

Abstract Intraabdominal masses are rare and often only recognized in the third trimester of pregnancy. There are typically multiple options for diagnosis, but the differential diagnosis can be narrowed by…

Abstract Megacystis microcolon intestinal hypoperistalsis syndrome (MMIHS) is also called neonatal hollow visceral myopathy or Berdon syndrome . MMIHS is characterized by functional intestinal obstruction, dilated small intestine, microcolon, malrotation,…

Abstract A cloaca is a common chamber into which some or all of the digestive, urinary, and reproductive tracts discharge their contents. A cloaca exists in all human embryos up…

Abstract Ambiguous genitalia is a morphologic diagnosis, with various underlying genetic and hormonal etiologies. Because of the complex genetic, hormonal, physical, and social factors involved, determination of fetal sex in…

Abstract Fetal adrenal abnormalities can arise from either structural or functional anomalies. Structural abnormalities can be visualized on ultrasound as solid or cystic structures, such as neuroblastoma or hemorrhage. Congenital…

Abstract A congenital cystic adenomatous malformation is a developmental lung malformation consisting of abnormal hamartomatous or dysplastic lung tissue and bronchoalveolar structures. The diagnosis can be made during fetal life…

Abstract The fetal thymus is a lymphoepithelial structure that grows throughout fetal life and is located in the anterior mediastinum. It is apparent on ultrasound as a homogeneous, quadrangular structure…