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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:Subpleural curvilinear line
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Accession:HP:0033702 term browser browse the term
Definition:This finding is a thin curvilinear opacity, 1-3 mm in thickness, lying less than 1 cm from and parallel to the pleural surface. It corresponds to atelectasis of normal lung if seen in the dependent posteroinferior portion of lung of a patient in the supine position and is subsequently shown to disappear on CT sections acquired with the patient prone. It may also be encountered in patients with pulmonary edema or fibrosis (other signs are usually present).
Comment:Though described in the context of asbestosis, subpleural curvilinear line is not specific for asbestosis. See Figure 68 of Hansell DM, et al., Fleischner Society: glossary of terms for thoracic imaging. Radiology. 2008;246:697-722.

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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 subpleural morphology 0
                Subpleural curvilinear line 0
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