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• W1967701337 abstract "In order to assess the age-related changes in CD10 and CD19 fluorescence intensity (FI) the present study analyzed by flow cytometry 56 sternal biopsies from ‘normal’ infants, children and adults undergoing cardiac surgery. The CD10+weak subset was predominant in all age groups, representing approximately 50% of the bone marrow (BM) lymphoid cells in children younger than 4 years. Both CD10+ subsets significantly decreased with age but their ratio did not differ significantly. Moreover, the intensity of CD10 and CD19 fluorescence in the strong and weak subsets did not vary with age. The CD19 intensity was significantly higher in CD10+weak than in CD10+strong cells. In addition, we classified as CD10+weak or CD10+strong the leukemic cells from BM aspirates of 117 patients with common acute lymphoblastic leukemia (cALL) (78 children and 39 adults). A higher frequency of cases expressing the CD19+CD10+strong phenotype was observed both in children and adults. Children of the CD10+weak group tended to be older than those of the CD10+strong group (median=7 vs. 4 years, P=0.07), and presented a significantly higher frequency of splenomegaly (93.7 vs. 55%, P=0.04), which was massive in about 60% of these cases. Among adults, a significantly higher frequency of cases expressing the CD10+weak phenotype was observed in females. No other clinical or biological difference was detected between the two groups either for children or adults. Concerning the treatment outcome, we did not observe significant differences in complete remission rate (CRR) or in disease free survival (DFS) among the 32 children and 28 adults analyzed. Finally, we compared the CD10 and CD19 intensity in normal and leukemic BM. Overexpression of either or both antigens in leukemic cells was observed in 42.4% of the cALL cases. In these cases, using cut off values of 110 afu for the CD10 FI and of 100 afu for the CD19 FI, the detection of leukemic cells was possible at levels of 0.2% based on CD10 analysis, of 0.6% based on CD19, and 0.02% when both antigens were overexpressed. In conclusion, we demonstrated that the heterogeneity of CD10 and CD19 fluorescence intensity is of no clinical relevance in cALL, although its study may be helpful for the diagnosis and the detection of minimal residual disease." @default.
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• W1967701337 date "1999-05-01" @default.
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• W1967701337 title "CD10 and CD19 fluorescence intensity of B-cell precursors in normal and leukemic bone marrow. Clinical characterization of CD10+strong and CD10+weak common acute lymphoblastic leukemia" @default.
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• W1967701337 doi "https://doi.org/10.1016/s0145-2126(98)00190-8" @default.
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