title: Umbilical cord hernia mimicking a cord teratoma.
abstract: BACKGROUND
  Most umbilical cord masses detected by sonography are angiomyxomas, hematomas, or teratomas. Cord teratomas arise from totipotent stem cells and contain tissue from the three germ-cell layers. Tumour components are foreign to surrounding tissue and may have a polymorphic presentation.
  
  
  METHODS
  We report a case of a suspected umbilical cord teratoma, identified by sonographic and magnetic resonance imaging, which in fact camouflaged an umbilical cord hernia. The natural history of an omphalocele and umbilical cord hernia dictates the presence of such anterior abdominal wall defects by approximately 12 weeks' gestation, once the gut returns from the peritoneal space within the umbilical stalk to the peritoneal cavity. Adipose tissue is not described as a classic finding in an omphalocele or umbilical cord hernia.
  
  
  CONCLUSIONS
  Our case of umbilical cord hernia is the first described as strictly distal to, and not contained within, the abdominal wall cord insertion site, and to contain fat, thereby mimicking a cord teratoma.
authors: Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology and Newborn Care, University of Ottawa, Ottawa ON.
authors: Amira
authors: A
authors: El-Messidi
authors: Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology and Newborn Care, University of Ottawa, Ottawa ON.
authors: Karen Fung Kee
authors: KFK
authors: Fung
mesh_terms: D000328:Adult; D003937:Diagnosis, Differential; D005260:Female; D006554:Hernia, Umbilical / Q000175:diagnosis*; D006801:Humans; D008279:Magnetic Resonance Imaging; D011247:Pregnancy; D013724:Teratoma / Q000175:diagnosis; D016216:Ultrasonography, Prenatal; D014470:Umbilical Cord