Spatially segregated B- and T-lymphoblasts in mixed-phenotype acute leukemia with BCR::ABL1
摘要
Background
Mixed phenotype acute leukemias (MPALs) account for approximately 2–5% of acute leukemias.
PurposeWe report a case of MPAL with BCR::ABL1 demonstrating striking spatial segregation of B- and T-lymphoblasts involving the bone marrow and cervical lymph node, respectively.
MethodsMorphologic, immunophenotypic, and genetic characterization were performed.
ResultsThese studies identified two distinct lineage-specific blast populations. Molecular studies demonstrated shared genetic features, supporting a common clonal origin.
ConclusionsThis case expands the clinicopathologic spectrum of MPALs and raises the possibility of lineage-restricted differentiation occurring in distinct tissue microenvironments.