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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:Anomalous tracheal cartilage
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Accession:HP:0004468 term browser browse the term
Definition:An abnormality of the C-shaped rings of hyaline cartilage, normally 16 to 20 in number, that occupy the anterior two-thirds of the circumference of the trachea (the posterior portion of the ring is completed by fibrous and smooth muscle tissue).
Synonyms:exact_synonym: Abnormal tracheal cartilaginous ring
 xref: UMLS:C1863406

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  Human phenotype 0
    Phenotypic abnormality 0
      Abnormality of the respiratory system 0
        Abnormal respiratory system morphology 0
          Abnormal tracheobronchial morphology 0
            Abnormal tracheal morphology 0
              Anomalous tracheal cartilage 0
                Complete tracheal ring 0
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