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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:Mass on thoracic imaging
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Accession:HP:0033822 term browser browse the term
Definition:A mass is any pulmonary, pleural, or mediastinal lesion seen on chest radiographs as an opacity greater than 3 cm in diameter (without regard to contour, border, or density characteristics). Mass usually implies a solid or partly solid opacity. CT allows more exact evaluation of size, location, attenuation, and other features.

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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 pulmonary thoracic imaging finding 0
              Mass on thoracic imaging 0
                Mediastinal mass + 0
                Pleural mass 0
                Pulmonary mass + 0
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