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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:Usual interstitial pneumonia
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Accession:HP:0031950 term browser browse the term
Definition:Temporal and spatial heterogeneity in lungs based on presence of fibrosis and honeycombing.
Comment:Usual interstitial pneumonia (UIP) is usually identified by a honeycombing pattern in a CT scan; in contrast, diffuse interstitial pneumonia (DIP) is not associated with the honeycombing pattern of fibrotic tissue. DIP tends to stabilize or improve after treatment, UIP often continues to progress (irregular lines or honeycombing). Honeycombing, clustered cysts with well-defined walls involving the subpleural lung, is the key finding for making a definite diagnosis of UIP pattern. UIP is associated with autoimmune diseases such as rheumatoid arthritis (and rheumatoid arthritis-interstitial lung disease, or RA-ILD).

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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 pulmonary interstitial morphology 0
                Usual interstitial pneumonia 0
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