ECNM. Violin plots on the distribution of various serum chemistry markers throughout the systemic mastocytosis subtypes. The P values refer to the Mann-Whitney U test. AdvSM, advanced systemic mastocytosis; ASM, aggressive systemic mastocytosis; BMM, bone marrow mastocytosis; ISM, indolent systemic mastocytosis; MCL, mast cell leukemia; SM-AHN, systemic mastocytosis with an associated hematologic neoplasm; SSM, smoldering systemic mastocytosis.