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The Mouse Adult Gross Anatomy Ontology and Mammalian Phenotype Ontology are downloaded weekly from the Mouse Genome Informatics databases at Jackson Laboratories ( For more information about these ontologies, see the MGI Publications Page at

Term:decreased mast cell number
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Accession:MP:0000336 term browser browse the term
Definition:fewer than expected number of the cells that are found in almost all tissues, containing numerous basophilic granules and capable of releasing large amounts of histamine and heparin upon activation
Synonyms:exact_synonym: reduced mast cell number

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absent mast cells term browser
Symbol Object Name Evidence Notes Source PubMed Reference(s) RGD Reference(s) Position
G Kit KIT proto-oncogene receptor tyrosine kinase IMP RGD PMID:1912576 RGD:5133424 NCBI chr14:32,547,459...32,624,694
Ensembl chr14:32,548,877...32,624,652
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G KitWs KIT proto-oncogene receptor tyrosine kinase; mutant 1 IMP RGD PMID:1912576 RGD:5133424

Term paths to the root
Path 1
Term Annotations click to browse term
  mammalian phenotype 5415
    immune system phenotype 502
      abnormal immune system morphology 194
        abnormal immune system cell morphology 154
          abnormal leukocyte morphology 154
            abnormal leukocyte cell number 138
              decreased leukocyte cell number 90
                decreased granulocyte number 14
                  decreased mast cell number 3
                    absent mast cells 3
Path 2
Term Annotations click to browse term
  mammalian phenotype 5415
    hematopoietic system phenotype 250
      abnormal hematopoietic system morphology/development 230
        abnormal hematopoietic cell morphology 186
          abnormal myeloid cell morphology 108
            abnormal myeloid leukocyte morphology 70
              abnormal granulocyte morphology 43
                abnormal granulocyte number 43
                  abnormal mast cell number 5
                    decreased mast cell number 3
                      absent mast cells 3
paths to the root