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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:Pes planus
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Accession:HP:0001763 term browser browse the term
Definition:A foot where the longitudinal arch of the foot is in contact with the ground or floor when the individual is standing; or, in a patient lying supine, a foot where the arch is in contact with the surface of a flat board pressed against the sole of the foot by the examiner with a pressure similar to that expected from weight bearing; or, the height of the arch is reduced.
Synonyms:exact_synonym: Flat feet;   Flat foot
 related_synonym: Dropped arches;   Fallen arches
 xref: SNOMEDCT_US:203534009;   SNOMEDCT_US:53226007;   UMLS:C0016202;   UMLS:C0264133

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  Human phenotype 0
    Phenotypic abnormality 0
      Abnormality of limbs 0
        Abnormality of the lower limb 0
          Abnormal foot morphology 0
            Pes planus 0
              Skewfoot 0
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