Chronic Lymphocytic Leukemia With Two B-Cell Populations of Discordant Light Chain Restrictions in Individual Patients: Parallel Development of Biclonal B-Cell Neoplasms or Clonal Evolution With Isotype Switch?
American journal of clinical pathology(2023)
摘要
Despite a polytypic pattern of light chain expression, the neoplastic nature of biclonal CLL is suggested by a characteristic CLL phenotype and can be confirmed by cytogenetic and genomic analyses. The two clones with discordant light chain isotypes may share a "stem-line" cytogenetic abnormality, suggesting possible clonal evolution. Biclonal CLL is associated with NOTCH1 mutations, which may occur in a small subclone and gradually evolve in clonal size. Genomic analysis on light chain-sorted and/or chronologically collected samples may provide insight into clonal evolution in CLL.
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关键词
NOTCH1
,Biclonal,Chronic lymphocytic leukemia,Clonal evolution,Small lymphocytic lymphoma
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