Abstract |
The purpose of this series was to report on the observation of an anomalous course of the umbilical artery. Ten cases in a 25-month period are reported. An omega-shaped variant, coined the "omega sign," of one of two umbilical arteries or of a single umbilical artery was observed. In 2 cases, there were two umbilical arteries, one of them with the anomalous vessel. In 8 cases, the vessel was a single umbilical artery. In 1 case with a single umbilical artery and pericardial effusion, aneuploidy was found on amniocentesis. A second case was associated with multiple anomalies. A third case was associated with hypoplastic left heart syndrome. Seven cases with the omega sign as an isolated finding, with or without a single umbilical artery, had favorable outcomes. An omega-shaped variant of the umbilical artery is likely to be more common in cases of a single umbilical artery than in cases with two umbilical arteries. It is probably a normal variant when unassociated with additional sonographically detectable structural anomalies.
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Authors | Ori Shen, Ron Rabinowitz, Gustavo Malinger, Eyal Mazaki, Avi Tsafrir |
Journal | Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine
(J Ultrasound Med)
Vol. 32
Issue 3
Pg. 541-4
(Mar 2013)
ISSN: 1550-9613 [Electronic] England |
PMID | 23443196
(Publication Type: Case Reports, Journal Article)
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Topics |
- Abnormalities, Multiple
(diagnostic imaging, embryology)
- Female
- Humans
- Male
- Pregnancy
- Pregnancy Outcome
- Reproducibility of Results
- Sensitivity and Specificity
- Ultrasonography, Prenatal
(methods)
- Umbilical Arteries
(abnormalities, diagnostic imaging)
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