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1995:
Tàssies D; Montserrat E; Reverter J C; Villamor N; Rovira M; Rozman C
Myelomonocytic antigens in B-cell chronic lymphocytic leukemia.
Leukemia research 1995;
19(
11):.
The clinical significance of myelomonocytic (MyMo) antigens in B-cell chronic lymphocytic leukemia (B-CLL) is unclear. We have analyzed the expression of MyMo antigens (CD13, CD14 (LeuM3, My4, Mo2), CD15, CD11b, CD11c, CD33 and CD68) on B-lymphocytes (CD19+) in 105 B-CLL patients and in 35 controls. A double direct staining technique and flow cytometric analysis was performed. The expression of MyMo antigens on the control group did not exceed 4% B-lymphocytes. A MyMo antigen was considered as positive when present in > or = 10% of B-lymphocytes. Among the B-CLL patients, 28 (26.7%) were positive for CD11c, 21 (20.0%) for CD11b, nine (8.6%) for CD15, five (4.8%) for CD13, two (1.9%) for Mo2, and one (1.0%) for My4. No patient was positive for LeuM3, CD33 or CD68. CD11c was more frequently expressed in patients with a short lymphocyte doubling time (< 12 months) (P = 0.05) and CD11b in the group with a higher number of lymphoid areas involved (P = 0.02). No correlation was found between lymphoid morphology and MyMo antigen expression. Fourteen of the 80 patients at risk subsequently progressed to a more advanced stage. Multivariate analysis identified hemoglobin (P = 0.004) and CD11b positivity (P = 0.009) as independent variables for disease progression. Fifteen patients died during evolution. Seven out of the 21 CD11b positive patients and eight of the 84 CD11b negative patients died (LR: P = 0.02, BG: P = 0.05). In the multivariate analysis, only CD11b positivity (> or = 10%) added prognostic value to clinical stages.
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