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HUMAN PHENOTYPE - ANNOTATIONS

The Human Phenotype Ontology (HPO) is downloaded weekly from http://compbio.charite.de/hudson/job/hpo/lastStableBuild/artifact/ontology/release/hp.obo. The file downloaded is considered the "last stable build" available for the ontology. For more about the HPO, view their website at http://www.human-phenotype-ontology.org/.
Term:Duplicated odontoid process
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Accession:HP:0025374 term browser browse the term
Definition:The presence of two distinct odontoid processes. The odontoid process, also known as the dens of the axis, is a protuberance of the C2 vertebral body around which the first vertebra rotates.
Comment:The odontoid process forms from different ossification centers. Two centers normally appear on each side of the midline around the fifth or sixth month of fetal life. These two centers usually fuse by one year of age. When there is a delay in fusion, a longitudinal midline cleft may be seen. Duplication of the odontoid process most likely is the result of a lack of fusion of these two centers of ossification [from PMID:9367321].


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  Human phenotype 0
    Phenotypic abnormality 0
      Abnormality of the musculoskeletal system 0
        Abnormality of the skeletal system 0
          Abnormal skeletal morphology 0
            Abnormal axial skeleton morphology 0
              Abnormality of the vertebral column 0
                Abnormal odontoid process morphology 0
                  Duplicated odontoid process 0
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