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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:Pleural cyst
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Accession:HP:0025422 term browser browse the term
Definition:A closed sac-like structure originating from the pleura that contains a liquid, gaseous, or semisolid substance.
Comment:Pleuropericardial cysts usually are congenital anomalies. after the third week of gestation, the mesoderm separates itself to form pleural, pericardial and peritoneal spaces. Incomplete partitioning can result in a pleuropericardial cyst.

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  Human phenotype 0
    Phenotypic abnormality 0
      Abnormality of the respiratory system 0
        Abnormal respiratory system physiology 0
          Abnormal respiratory system morphology 0
            Abnormal lung morphology 0
              Abnormal pleura morphology 0
                Pleural cyst 0
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