Neurenteric cysts with meningomyelocele or meningocele. Split notochord syndrome.

Two rare cases of neurenteric cysts with meningomyelocele and meningocele were treated. The mechanism of the development of these anomalies is discussed. It is considered that the terminal, dorsal part of the enteric fistula, which is produced between the endoderm and the ectoderm through a partially duplicated notochord in the development of the embryo, remains after obliteration of the fistula and, consequently, that the mucosa of the enteric remnant is inverted and projects through the skin of the back.