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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:Positive pathergy test
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Accession:HP:0025532 term browser browse the term
Definition:With the pathergy test, a small, sterile needle is inserted into the skin of the forearm. The site of injectionis circuled and observed after one and two days. If a small red bump or pustule at the site of needle insertion occurs, the pathergy test is considered to have a positive (abnormal) result.
Comment:A positive pathergy test indicates the immune system is overreacting to a minor injury. A positive test result can be seen in Behcet disease and other conditions.

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  Human phenotype 0
    Phenotypic abnormality 0
      Abnormality of the integument 0
        Abnormality of the skin 0
          Abnormality of skin physiology 0
            Positive pathergy test 0
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