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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

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Accession:MP:0001890 term browser browse the term
Definition:anomaly that occurs when the anterior neuropore of the neural tube fails to close, resulting in the congenital partial or complete absence of the cranial vault accompanied by absence of overlying tissues, including the brain and cerebral hemispheres, skull and scalp; in affected organisms, the forebrain remains in contact with the amniotic fluid and subsequently degenerates, including the cerebrum (areas responsible for cognition); any remaining brain tissue, such as the brain stem, is often exposed
Synonyms:exact_synonym: anencephalia
 alt_id: MP:0000915
 xref: Fyler:4332

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  mammalian phenotype 5400
    nervous system phenotype 365
      abnormal nervous system morphology 212
        abnormal nervous system development 16
          anencephaly 0
            meroanencephaly 0
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