abnormal neural crest cell proliferation decreased neural crest cell proliferation 2014-03-27T14:22:23Z MP:0012741 MPheno.ontology csmith decreased NCC proliferation reduced NCC proliferation reduced ability of the transient and migratory group of cells that emerge from the dorsal region of the neural tube and migrate to many peripheral locations to form various tissues of the adult to undergo rapid expansion by cell division reduced neural crest cell proliferation