An umbilical arterial aneurysm (UAA) is an extremely rare but potentially lethal vascular anomaly which is usually detected in utero.
It tends to favor the placental end of the umbilical artery in the cord.
Concurrently associated anomalies are thought to be high and include
May be seen as a cystic to elongated dilatation in relation to an umbilical artery. Color Doppler interrogation may show non-pulsatile turbulent flow.
Treatment and prognosis
The presence of a UAA can be lethal. When there are no associated anomalies and the fetus is potentially viable otherwise, some recommend delivery as soon as fetal lung maturity is assured when this diagnosis is made prenatally 5.
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- 5. Sepulveda W, Corral E, Kottmann C et-al. Umbilical artery aneurysm: prenatal identification in three fetuses with trisomy 18. Ultrasound Obstet Gynecol. 2003;21 (3): 292-6. doi:10.1002/uog.69 - Pubmed citation
- 6. Fox H, Sebire NJ. Pathology of the placenta. W B Saunders Co. (2007) ISBN:1416025928. Read it at Google Books - Find it at Amazon