Moore L, Toi A, Chitayat D
Department of Radiology, The Toronto Hospitals--General Division, Ontario, Canada.
Ultrasound Obstet Gynecol. 1996 Jan;7(1):21-5. doi: 10.1046/j.1469-0705.1996.07010021.x.
Anomalies of the fetal umbilical vessels are rare, excepting single umbilical arteries which occur in 0.2-1.0% of pregnancies. Abnormalities of the intra-abdominal umbilical vein may be categorized into three main groups: (1) the ductus venosus is patient but the right umbilical vein persists; (2) the ductus venosus is not patent, and there is extrahepatic continuation of the umbilical vein; and (3) the umbilical vein takes a normal course but is abnormally dilated. We describe cases of each of these types of anomaly, including the first report of prenatal diagnosis of insertion of the umbilical vein into the iliac vein, and review the literature on this subject.
胎儿脐血管异常较为罕见，但单脐动脉除外，其在0.2%-1.0%的妊娠中出现。腹内脐静脉异常可分为三大类：（1）静脉导管正常，但右脐静脉持续存在；（2）静脉导管不通畅，脐静脉在肝外延续；（3）脐静脉走行正常，但异常扩张。我们描述了每种类型异常的病例，包括脐静脉插入髂静脉产前诊断的首例报告，并回顾了关于该主题的文献。
