Minimal residual disease positive acute B lymphocytic leukemia: immunophenotyping analyses of 106 cases / 白血病·淋巴瘤

ABSTRACT

Objective To analyze the immunophenotypic characteristics of the patients with minimal residual disease (MRD) positive acute B lymphocytic leukemia (B-ALL). Methods The leukemia-associated immunophenotype (LAIP) of 106 cases with MRD positive B-ALL from Department of Hematology, Tianjin KingMed Diagnois Center between June 2014 and January 2016 were retrospectively analyzed. CD10, CD13/CD33, CD19, CD38, CD58, CD45 and other antibodies were used to analyze the MRD of B-ALL. Results All the patients were positive for CD19. CD34 was negatively or weakly positive expressed in 27 cases (25.4％). CD10 was negatively or weakly positive expressed in 23 cases (21.7％). CD10 was strongly positive in 24 cases (22.6％). Totally, CD10 was weakly or strongly expressed in 47 cases (44.3％). CD58 was strongly positive in 98 cases (92.5％). CD13/CD33 was positively or weakly positive expressed in 64 cases (60.4％). CD38 was negative or weakly expressed in 33 cases (31.1％). CD45 was negative in 21 cases (19.8％). 15 cases (14.1％) were positive for 6 types of LAIP; 30 (28.3％) cases were positive for 5 types of LAIP; 42 (39.6％) cases were positive for 4 types of LAIP; 13 (12.3％) cases were positive for 3 types of LAIP;5 cases (4.7％) were positive for 2 types of LAIP; only one case (0.9％) was positive for 1 type of LAIP. Conclusion The combination of CD58, CD13/CD33, CD10, CD38 and CD34 antibodies can distinguish the neoplastic blast/immature B lymphocytes from progenitor B cells. This strategy has a high accuracy for the judgement of MRD in B-ALL.