Case Report Systemic mastocytosis with associated clonal hematologic non-mast cell lineage disease (SM-AHNMD) involving chronic myelogenous leukemia with complex cytogenetics: A case report and literature review

Systemic mastocytosis with associated clonal hematologic non-mast cell lineage disease (SMAHNMD) is a subtype of systemic mastocytosis (SM) characterized by neoplastic proliferation of mast cells in association with a hematologic neoplasm defined by the World Health Organization (WHO) criteria. SM-AHNMD is more commonly associated with myeloid neoplasms such as, chronic myelomonocytic leukemia (CMML), myelodysplastic syndrome (MDS), acute myeloid leukemia (AML), myeloproliferative neoplasms (MPN), and occasionally exists with lymphoid neoplasms such as B-cell lymphoproliferative disorders and plasma cell dyscrasia. Although SM-AHNMD is more commonly associated with a myeloid malignancy, an association with chronic myelogenous leukemia (CML) is rarely seen. To date, less than a handful of SM-AHNMD associated with CML cases have been reported. We present another case of SM-AHNMD associated with CML and a review of the literature.