| umls-concept:C0024899 | skos:definition | MSH: A heterogenous group of disorders characterized by the abnormal increase of MAST CELLS in only the skin (MASTOCYTOSIS, CUTANEOUS), in extracutaneous tissues involving multiple organs (MASTOCYTOSIS, SYSTEMIC), or in solid tumors (MASTOCYTOMA).,CSP: rare disease characterized by an abnormal increase in mast cells in the bone marrow, liver, spleen, lymph nodes, gastrointestinal tract, and skin.,NCI: 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. | lld:umls |
