Distinctive immunophenotypic features of t(8;21)(q22;q22) acute myeloblastic leukemia in children.
نویسندگان
چکیده
Thirty cases of newly diagnosed pediatric acute myeloblastic leukemia (AML) with French-American-British (FAB) M2 morphology were analyzed with cytogenetics and a comprehensive panel of monoclonal antibodies reactive with lymphoid-, natural killer (NK)-cell-, and myeloid-associated antigens. The t(8;21)(q22;q22), or t(8;21;V)(q22;q22;V), translocation was identified in 16 of the 30 cases. Cases with the t(8;21) did not differ significantly from the remaining M2 cases with respect to expression of CD11b, CD13, CD14, CD15, CD33, CD34, CD36, CD41a, CD42b, CDw65, TdT, or HLA-DR. Expression of the B-cell antigen CD19 was detected in 13 of the 16 t(8;21) cases (81%), but in only 1 of the 14 (7%) other M2 cases (P = .00006). Expression of the CD56 NK-cell antigen was also significantly more frequent among t(8;21) cases (63% v 14%; P = .01). Coexpression of CD19 and CD56 was found only in the t(8;21) group (9 of 16 cases, P = .0009). Furthermore, this phenotype was not found in 48 evaluable cases of de novo AML of the FAB M1, M3, M4, M5, or M7 subtypes. The 14 M2 AML cases lacking the t(8;21) commonly expressed CD2 (n = 5) or CD7 (n = 8). However, no case with the t(8;21) expressed either antigen (P = .01 and .0005, respectively). Thus, the t(8;21) biologic subgroup of pediatric M2 AML has distinct immunophenotypic characteristics that distinguish it from other types of de novo AML.
منابع مشابه
Expression of CD7 antigen precludes t(8;21)(q22;q22) chromosome aberration in acute myeloblastic leukemia.
The report by Ball et all showed the significance of the lymphoid markers, CD2 and CD19 antigens, expressed by subsets of acute myeloblastic leukemia (AML) in correlation with chromosomal aberrations and prognosis. The report disregarded CD7 antigen as lymphoid marker, probably because the relatively high incidence of the expression of CD7 antigen in AML cases, compared with CD2 or CD19 antigen...
متن کاملMorphological characteristics of leukemia cells in acute myeloblastic leukemia with t(8;21)(q22;q22): possible predictability of t(8;21)
The laboratory systems for chromosomal analysis or the detection of fusion genes are generally not available in Indonesia. Therefore, bone marrow (BM) morphological analysis should be developed and applied to get an accurate diagnosis. In this study the BM smears of eight (8) cases of acute myeloblastic leukemia (AML) which had already been known to have t(8;21)(q22;q22), were morphologically e...
متن کاملTetraploidy or near-tetraploidy clones with double 8;21 translocation: a non-random additional anomaly of acute myeloid leukemia with t(8;21)(q22;q22).
We report on 6 patients with tetraploidy or near-tetraploidy acute myeloid leukemia (AML) with double t(8;21) (q22;q22) and review the literature on cases with the same cytogenetic abnormalities. Some common features were revealed by this analysis.
متن کاملTwo karyotypically independent leukemic clones with the t(8;21) and 11q23 translocation in acute myeloblastic leukemia at relapse.
Leukemic blast cells are thought to arise from clonal expansion of a single transformed hematopoietic cell. This generality is supported by the rarity of convincing reports on acute myeloblastic leukemia (AML) with two karyotypically independent clones. Relying on sequential cytogenetic analyses, we identified such clones in two children with relapsed AML. The first case, classified as M2 leuke...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Blood
دوره 80 12 شماره
صفحات -
تاریخ انتشار 1992