El-Messidi Amira, Fung Karen Fung Kee
Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology and Newborn Care, University of Ottawa, Ottawa ON.
J Obstet Gynaecol Can. 2009 Jun;31(6):533-537. doi: 10.1016/S1701-2163(16)34216-5.
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.
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.
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.
超声检查发现的大多数脐带肿物为血管黏液瘤、血肿或畸胎瘤。脐带畸胎瘤起源于全能干细胞，包含来自三个胚层的组织。肿瘤成分与周围组织不同，可能有多种表现形式。
我们报告一例经超声和磁共振成像诊断为疑似脐带畸胎瘤的病例，实际上该病例掩盖了脐带疝。脐膨出和脐带疝的自然病史表明，一旦肠道从脐带内的腹膜间隙返回腹腔，在妊娠约12周时就会出现这种前腹壁缺损。脂肪组织并非脐膨出或脐带疝的典型表现。
我们报道的脐带疝病例是首例被描述为严格位于腹壁脐带插入点远端且不包含在其中，并含有脂肪，从而酷似脐带畸胎瘤的病例。
