Mastocytosis, SystemicMastocytosisUrticaria PigmentosaMast CellsMastocytosis, CutaneousProto-Oncogene Proteins c-kitTryptasesLeukemia, Mast-CellBone MarrowBone Marrow ExaminationMethylhistaminesAnaphylaxisHypereosinophilic SyndromemRNA Cleavage and Polyadenylation FactorsLeukemia, Myelomonocytic, ChronicReceptor, Platelet-Derived Growth Factor alphaCell DegranulationChymasesBenzamidesAntigens, CD2Stem Cell FactorPyrimidinesEosinophiliaPiperazinesBiopsyPoint MutationMutationBone Marrow CellsHistamine Release