Abstract
To investigate the charactcristics of CD180 expression and differentiation diagnostic value in B cell chronic lymphoproliferative disorders (B-CLPD) through detecting the mean fluorescence intensity（MFI）of CD180 in different sub types of B-CLPD，using multiparameter flow cytometry (FCM). The CD180 MFI of malignant B cells in 178 patients with B-CLPD was detected by FCM. The level of CD180 MFI in various types of B-CLPD was compared to the normal control group. The level of CD180 MFI among sub-types of B-CLPD was also compared. (1) The expression levels of CD180 in B-CLPD was significantly lower as compared with the normal controls，except the spleen difuse red pulp lymphoma (SDRPL); (2) The CD180 MFI in chronic lymphocytic leukemia sCLL) was significantly lower as compared with other B-CLPD cells; (3) CD180 ware significantly overexpressed in HCL compared with MCL，LPL，and MZL (P <0.05); (4) In the spleen-derived B-CLPD，such as SMZL，HCL, HCL variation and SDRPL，the expression of CD180 has significant difference between lymphomas with or without villous. Utilizing the multiparameter flow cytometry for defecting expression of CD180 and other immunological markers can more efficiently distinguish the subtypes of B-CLPD.
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