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The Mouse Adult Gross Anatomy Ontology and Mammalian Phenotype Ontology are downloaded weekly from the Mouse Genome Informatics databases at Jackson Laboratories ( For more information about these ontologies, see the MGI Publications Page at

Term:open neural tube
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Accession:MP:0000929 term browser browse the term
Definition:failure of completion of the last step in the formation of the neural tube, where the paired neural folds are brought together and fuse at the dorsal midline
Synonyms:exact_synonym: failure of neural tube closure;   hydrocele spinalis;   schistorrhachis
 broad_synonym: spina bifida
 alt_id: MP:0000931;   MP:0005436

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  mammalian phenotype 5402
    nervous system phenotype 368
      abnormal nervous system morphology 215
        abnormal nervous system development 16
          abnormal neural tube morphology 0
            abnormal neural tube closure 0
              open neural tube 0
                meningocele 0
                meningomyelocele 0
                myelocele 0
                spina bifida + 0
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