title: Neoplastic mast cells in systemic mastocytosis associated with t(8;21) acute myeloid leukemia are derived from the leukemic clone.
abstract: In systemic mastocytosis with associated clonal, hematological non-mast cell lineage disease (SM-AHNMD), mast cell infiltration of the bone marrow coexists with a hematologic neoplasm, usually of myeloid origin. Activating KIT gene mutations are universally present in these neoplastic mast cells. When SM is associated with AML, the leukemic cells commonly carry the t(8;21)(q22;q22) core binding factor translocation. The precise relationship between neoplastic mast cells and the leukemic clone has remained unclear. By target FISH analysis, we demonstrate t(8;21) in the bone marrow mast cells of a patient with systemic mastocytosis associated with t(8;21) AML, thus, proving the origin of these neoplastic mast cells from the leukemic clone. We also show that after successful allogeneic hematopoietic stem cell transplantation, these neoplastic bone marrow mast cells can persist without adverse consequences and gradually decline with time.
authors.affiliation: Division of Hematology and Hematopoietic Cell Transplantation, Department of Cytogenetics, Division of Pathology, City of Hope Comprehensive Cancer Center, 1500 East Duarte Road, Duarte, CA 91010, United States. vpullarkat@coh.org
authors.forename: Vinod
authors.initials: V
authors.lastname: Pullarkat
authors.forename: Victoria
authors.initials: V
authors.lastname: Bedell
authors.forename: Young
authors.initials: Y
authors.lastname: Kim
authors.forename: Ravi
authors.initials: R
authors.lastname: Bhatia
authors.forename: Ryotaro
authors.initials: R
authors.lastname: Nakamura
authors.forename: Stephen
authors.initials: S
authors.lastname: Forman
authors.forename: Jiyao
authors.initials: J
authors.lastname: Sun
authors.forename: David
authors.initials: D
authors.lastname: Senitzer
authors.forename: Marilyn L
authors.initials: ML
authors.lastname: Slovak
mesh_terms: D000208:Acute Disease; D002891:Chromosomes, Human, Pair 21 / Q000235:genetics; D002898:Chromosomes, Human, Pair 8 / Q000235:genetics*; D020732:Cytogenetic Analysis / Q000379:methods; D005091:Exons; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D017404:In Situ Hybridization, Fluorescence / Q000379:methods; D007951:Leukemia, Myeloid / Q000175:diagnosis / Q000235:genetics* / Q000628:therapy; D008407:Mast Cells / Q000473:pathology*; D034721:Mastocytosis, Systemic / Q000175:diagnosis / Q000235:genetics* / Q000628:therapy; D008875:Middle Aged; D016609:Neoplasms, Second Primary / Q000175:diagnosis / Q000235:genetics* / Q000628:therapy; D017354:Point Mutation; D016133:Polymerase Chain Reaction / Q000379:methods; D019009:Proto-Oncogene Proteins c-kit / Q000235:genetics
chemical_list: D019009:Proto-Oncogene Proteins c-kit