Obstructive internal hernia caused by mesodiverticular bands in children: Two case reports and a review of the literature. The mesodiverticular band (MDB) is an embryologic remnant of the vitellinecirculation, which carries the arterial supply to the Meckel diverticulum. In the event of an error of involution, a patent or nonpatent arterial band persists and extends from the mesentery
The Choriovitelline placenta: prenatal sonographic imaging and clinical characteristics. To describe the fetal sonographic characteristics, in-utero natural history and postnatal outcome of choriovitelline placenta, in which the fetal umbilical vein is replaced by the extra-embryonic vitellinecirculation. This was a retrospective study of pregnancies examined during the period 2010-2014