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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

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Accession:HP:0005548 term browser browse the term
Definition:A reduced count of megakaryocytes.
Comment:Megakaryocytes are giant cells in the bone marrow. Mature blood platelets are released from the cytoplasm of megakaryocytes.
Synonyms:xref: UMLS:C1858312

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Megakaryocytopenia term browser
Symbol Object Name Evidence Notes Source PubMed Reference(s) RGD Reference(s) Position
G GNA14 G protein subunit alpha 14 IAGP ORPHA:1063 HPO NCBI chr 9:77,423,079...77,648,322
Ensembl chr 9:77,423,079...77,648,322
JBrowse link
G HOXA11 homeobox A11 IAGP OMIM:605432 HPO NCBI chr 7:27,181,157...27,185,232
Ensembl chr 7:27,181,157...27,185,232
JBrowse link
G KIF15 kinesin family member 15 IAGP OMIM:619981 HPO NCBI chr 3:44,761,794...44,868,687
Ensembl chr 3:44,761,721...44,873,376
JBrowse link
G MPL MPL proto-oncogene, thrombopoietin receptor IAGP OMIM:604498 HPO NCBI chr 1:43,337,818...43,354,466
Ensembl chr 1:43,337,818...43,354,466
JBrowse link
G ZNFX1 zinc finger NFX1-type containing 1 IAGP OMIM:619644 HPO NCBI chr20:49,245,900...49,278,057
Ensembl chr20:49,237,946...49,278,426
JBrowse link

Term paths to the root
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Term Annotations click to browse term
  Human phenotype 14888
    Phenotypic abnormality 14885
      Abnormality of blood and blood-forming tissues 1995
        Abnormality of bone marrow cell morphology 225
          Abnormal megakaryocyte morphology 24
            Megakaryocytopenia 5
paths to the root