Megacystis associated with an umbilical cord cyst: a sonographic feature of a patent urachus in the first trimester

Journal of Ultrasound in Medicine : Official Journal of the American Institute of Ultrasound in Medicine
Waldo SepulvedaVictor Dezerega

Abstract

The purpose of this series was to report the first-trimester sonographic findings, antenatal course, and outcome in fetuses with a patent urachus. We conducted a review of ultrasound reports and medical charts from 3 pregnancies complicated by a congenital patent urachus detected in the first trimester. All 3 fetuses had megacystis and an umbilical cord cyst close to the fetal abdominal insertion that was detected in the first trimester. In 2 cases, the megacystis resolved spontaneously while the umbilical cord cyst worsened in appearance; among them, massive edema of the umbilical cord was documented in 1, and evidence of partial bladder exstrophy was detected in the third trimester in the other. Both cases required neonatal surgery with no complications. In the remaining case, the fetus died in the early second trimester. Postmortem examination confirmed the diagnosis of a patent urachus, an allantoic cyst, and thrombosis of the umbilical vessels. Megacystis is a warning sign of a patent urachus in the first trimester. The prognosis of this condition is generally good; however, fetal death can occur secondary to compression of umbilical vessels due to the expanding allantoic cyst.

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Citations

Nov 1, 2011·Journal of Ultrasound in Medicine : Official Journal of the American Institute of Ultrasound in Medicine·Yinon GilboaReuven Achiron
Mar 13, 2015·Radiographics : a Review Publication of the Radiological Society of North America, Inc·Tony W Trinh, Anne M Kennedy
Dec 15, 2012·Ultrasound in Obstetrics & Gynecology : the Official Journal of the International Society of Ultrasound in Obstetrics and Gynecology·C RasteiroA Matias
Jan 20, 2020·The Journal of Obstetrics and Gynaecology Research·Selen Gursoy ErzincanFusun G Varol
Aug 28, 2020·Journal of Ultrasound in Medicine : Official Journal of the American Institute of Ultrasound in Medicine·Osnat ZmoraRon Beloosesky
Jul 6, 2013·Ultrasound in Obstetrics & Gynecology : the Official Journal of the International Society of Ultrasound in Obstetrics and Gynecology·A KhalilB Thilaganathan

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