Term Name:	secondary neural tube formation
Synonyms:	medullary cord biosynthesis, medullary cord formation, medullary rod cavitation, neural rod formation, secondary neural tube rod cavitation, secondary neurulation
Definition:	The formation of the neural tube by coalescence of mesenchymal cells followed by their conversion to epithelial cells to form a solid cord that subsequently hollows out (cavitates) to create a hollow tube. Secondary neurulation is the typical mechanism of formation of the neural tube posterior to the posterior neuropore in mammals.
Ontology:	GO: Biological Process [GO:0014021]    QuickGO    AmiGO