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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

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Accession:HP:0100774 term browser browse the term
Definition:Excessive growth or abnormal thickening of bone tissue.
Comment:Hyperostosis refers to a localized bone overgrowth process (as opposed to sclerosis, which refers to a generalized disturbance with increased bone density).
Synonyms:exact_synonym: Bone Hypertrophy;   Bone overgrowth
 xref: MESH:D015576;   SNOMEDCT_US:13814009;   SNOMEDCT_US:203514008;   UMLS:C0020492

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Term Annotations click to browse term
  Human phenotype 0
    Phenotypic abnormality 0
      Abnormality of the musculoskeletal system 0
        Abnormality of the skeletal system 0
          Abnormal skeletal morphology 0
            Hyperostosis 0
              Cranial hyperostosis + 0
              Vertebral hyperostosis 0
paths to the root