Co-occurrence of immature T-lymphoblastic lymphoma and acute myeloid leukemia—microenvironment-dependent lineage differentiation derived from a common progenitor?
نویسندگان
چکیده
Abstract Mixed phenotype acute leukemia (MPAL) is an uncommon disease characterized by currently only limited knowledge concerning biology, clinical presentation, and treatment outcome. We here describe a most unusual case of simultaneous occurrence T-lymphoblastic lymphoma in cervical mediastinal lymph nodes myeloid the bone marrow (BM) successfully treated with allogeneic stem cell transplantation (SCT). Although blasts both locations showed additional aberrant expression other lineage markers (even B-cell markers), diagnostic criteria MPAL were not fulfilled either LN or BM. performed next generation sequencing (NGS) objective to look for common genetic aberrations tissues. Histology, immunohistochemistry, flow cytometry, AML-associated alterations ( FLT3, NPM1, KIT D816V, CEPBA ), clonal T-cell receptor β γ gene rearrangements according routine workflows. Next Sanger additionally BM LN. Somatic mutation EZH2 (p.(Arg684Cys)) was detected NGS, same found Since identical aberration mutation) locations, progenitor regional dependent differentiation may be involved.
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ژورنال
عنوان ژورنال: Journal of Hematopathology
سال: 2021
ISSN: ['1865-5785', '1868-9256']
DOI: https://doi.org/10.1007/s12308-021-00466-4