An umbilical arterial aneurysm (UAA) is an extremely rare but potentially lethal vascular anomaly which is usually detected in utero.
If tends to favour the placental end of the umbilical artery in the cord.
Concurrent associated anomalies are thought to be high and include
May be seen as a cystic to elongated dilatation in relation to an umbilical artery. Colour Doppler interrogation may show non-pulsatile turbulent flow.
Treatment and prognosis
The presence of an 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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- 4. Shen O, Reinus C, Baranov A et-al. Prenatal diagnosis of umbilical artery aneurysm: a potentially lethal anomaly. J Ultrasound Med. 2007;26 (2): 251-3. J Ultrasound Med (full text) - Pubmed citation
- 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