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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Cytogenetic profile of minimally differentiated ( FAB M0) acute myeloid leukemia: correlation with clinicobiologic findings.

Cytogenetic data were studied in 26 patients with de novo acute myeloid leukemia (AML) with minimal myeloid differentiation, corresponding to the M0 subtype of the French-American-British classification, in correlation with cytoimmunologic and clinical findings. Clonal abnormalities were detected in 21 cases (80.7%), 12 of which had a complex karyotype. Partial or total monosomy 5q and/or 7q was found, either as the sole aberration or in all abnormal metaphases, in 11 patients; in 8 cases, additional chromosome changes were present, including rearrangements involving 12p12-13 and 2p12-15 seen in 3 cases each. Five patients had trisomy 13 as a possible primary chromosome change; in 5 cases, nonrecurrent chromsome abnormalities were observed. Comparison of these findings with chromosome data from 42 patients with AML-M1 shows that abnormal karyotypes, complex karyotypes, unbalanced chromosome changes (-5/5q- and/or -7/7q- and +13) were observed much more frequently in AML-M0 than in AML-M1. Patients with abnormalities of chromosome 5 and/or 7 frequently showed trilineage myelodysplasia and low white blood cell count. Despite their relatively young age, complete remission was achieved in 4 of 11 patients only. Patients with +13 were elderly males with frequent professional exposure to myelotoxic agents. Unlike patients with clonal abnormalities, most AML-M0 patients with normal karyotype showed 1% to 2% peroxidase-positive blast cells at light microscopy and frequently achieved CR. It is concluded that (1) AML-M0 shows a distinct cytogenetic profile, partially recalling that of therapy-related AML, (2) different cytogenetic groups of AML-M0 can be identified showing characteristic clinicobiologic features, and (3) chromosome rearrangements may partially account for the unfavorable outcome frequently observed in these patients.[1]


  1. Cytogenetic profile of minimally differentiated (FAB M0) acute myeloid leukemia: correlation with clinicobiologic findings. Cuneo, A., Ferrant, A., Michaux, J.L., Boogaerts, M., Demuynck, H., Van Orshoven, A., Criel, A., Stul, M., Dal Cin, P., Hernandez, J. Blood (1995) [Pubmed]
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