Umbilical vein varix

Has anyone had a baby diagnosed with an umbilical vein varix? What was the outcome? Were you induced early? If so, how early? Was baby healthy? NICU stays? Has anyone lost a baby because of this diagnosis? I am 31+4, and my son has a 15mm varix. All of the research that I've found has left me feeling completely helpless. Any feedback from folks with first hand experience with this would be very much appreciated, and if you are a follower of Christ, your prayers for my baby boy, Ephraim, would also be appreciated.