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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:0001059 term browser browse the term
Definition:Pterygia are 'winglike' triangular membranes occurring in the neck, eyes, knees, elbows, ankles or digits.
Synonyms:narrow_synonym: Surfer's eye
 related_synonym: Pterygia
 xref: MSH:D011625;   SNOMEDCT_US:77489003;   UMLS:C0033999

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Term paths to the root
Path 1
Term Annotations click to browse term
  Human phenotype 0
    Phenotypic abnormality 0
      Abnormality of the integument 0
        Abnormality of the skin 0
          Abnormality of skin morphology 0
            Regional abnormality of skin 0
              Pterygium 0
                Antecubital pterygium 0
                Axillary pterygium 0
                Intercrural pterygium 0
                Multiple pterygia 0
                Neck pterygia 0
                Popliteal pterygium 0
paths to the root