mast cell neoplasm leukocyte disorder mastocytosis https://www.malacards.org/card/mastocytosis EFO:0009001 MESH:D008415 MEDGEN:9902 MedDRA:10026891 ONCOTREE:MCD MONDO:0007950 DOID:350 icd11.foundation:691643472 Mast cell disease NCIT:C84269 mastocytosis Orphanet:98292 GARD:0006987 UMLS:C0024899 NORD:1408 A clonal myeloproliferative neoplasm characterized by the proliferation and accumulation of neoplastic mast cells in one or multiple organs or organ systems. It is a heterogeneous group of neoplasms, ranging from cutaneous proliferations which may regress spontaneously, to aggressive neoplasms associated with organ failure and short survival. ICD10WHO:Q82.2