Allantoic cyst Muktachand Rokade, MD. Article Published: Jul 31, 2007 India Case report This is an example of the allantoic cyst seen during the first trimester ultrasonographic investigation. Images 1, 2: 3D images showing cystic structure of the umbilical cord. Image 3: 2D transverse section of the umbilical cord centrally localized cystic structure. Discussion Board Start a discussion about this article Add bookmark Bookmarked