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Prenatal diagnosis of umbilical artery thrombosis

Kei Tanaka1, Shinji Tanigaki, Miho Matsushima

  • 1Department of Obstetrics and Gynecology, Kyorin University School of Medicine, Mitaka, Tokyo, Japan.

Fetal Diagnosis and Therapy
|November 13, 2013
PubMed

Umbilical artery thrombosis (UAT) is rare and few prenatally diagnosed cases have been reported. We describe 2 cases of fetal growth restriction prenatally diagnosed as UAT by ultrasound examination. In each case the cross section of the umbilical cord showed one normal artery and a small echogenic area which was suspected as an occluded thrombotic artery and they were surrounded by a highly curving 'C-shaped' vein. UAT was confirmed by histological examinations after deliveries in both cases. The characteristic ultrasound finding of the umbilical vessel, which is the so-called 'orange grabbed sign', enables the prenatal diagnosis of UAT and it is valuable with respect to perinatal fetal management because UAT is associated with increased perinatal morbidity and mortality.

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