label: Systemic Mastocytosis with an Associated Myeloid Neoplasm
label_lc: systemic mastocytosis with an associated myeloid neoplasm
description: A disorder characterized by systemic infiltration of internal organs by aggregates of clonal mast cells and the presence of a clonal non-mast cell myeloid neoplasm (e.g., myelodysplastic syndrome, myeloproliferative neoplasm, and acute myeloid leukemia).