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The Human Phenotype Ontology (HPO) is downloaded weekly from The file downloaded is considered the "last stable build" available for the ontology. For more about the HPO, view their website at

Term:Abnormal CNS myelination
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Accession:HP:0011400 term browser browse the term
Definition:An abnormality of myelination of nerves in the central nervous system.
Comment:In the CNS, myelin is the product of oligodendrocytes (and not of Schwann cells, as in the PNS). This term refers to an abnormality of the process in which myelin sheaths are formed and maintained around neurons or the result of such an abnormality.
Synonyms:exact_synonym: Abnormal formation of myelin sheaths
 alt_id: HP:0002520;   HP:0004335
 xref: UMLS:C4021152

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  Human phenotype 0
    Phenotypic abnormality 0
      Abnormality of the nervous system 0
        Abnormal nervous system morphology 0
          Abnormal myelination 0
            Abnormal CNS myelination 0
              CNS demyelination + 0
              CNS hypermyelination 0
              CNS hypomyelination + 0
              Cerebral dysmyelination 0
              Delayed CNS myelination 0
              Leukodystrophy + 0
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