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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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Mediastinal mass term browser
Symbol Object Name Evidence Notes Source PubMed Reference(s) RGD Reference(s) Position
G KIF1B kinesin family member 1B IAGP HPO OMIM:256700 NCBI chr 1:10,210,570...10,381,603
Ensembl chr 1:10,210,570...10,381,603
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Term paths to the root
Path 1
Term Annotations click to browse term
  Human phenotype 21537
    Phenotypic abnormality 21527
      Abnormality of the respiratory system 2473
        Abnormal respiratory system physiology 2463
          Abnormal respiratory system morphology 1616
            Abnormal pulmonary thoracic imaging finding 156
              Mass on thoracic imaging 1
                Mediastinal mass + 1
                Pleural mass 0
                Pulmonary mass + 0
paths to the root