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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:Abnormal Eustachian tube morphology
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Accession:HP:0040115 term browser browse the term
Definition:A structural anomaly of the Eustachian tube (ET). The ET is a biomechanical valve between the nasopharynx and the middle ear. Physiologically, it controls the passive adaptation of the middle ear air pressure to the ambient air pressure primarily via direct muscular actions of the soft palate. In the closed state it protects the middle ear. Inadequate function of the ET causes middle ear ventilation disorders.
Synonyms:exact_synonym: Abnormality of the Eustachian tube
 alt_id: HP:0040124
 xref: SNOMEDCT_US:204250005;   UMLS:C0262475

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Term Annotations click to browse term
  Human phenotype 0
    Phenotypic abnormality 0
      Abnormality of the ear 0
        Abnormal ear morphology 0
          Abnormality of the middle ear 0
            Abnormal Eustachian tube morphology 0
              Aplasia of the Eustachian tube 0
              Atresia of the Eustachian tube 0
              Blocked Eustachian tube 0
              Stenosis of the Eustachian tube 0
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