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OBJECTIVE To study a relationship between cytogenetic disorders, clinicobiological characteristics and prognosis in chronic B-cell lymphoid leukemia (B-CLL). METHODS Cytogenetic examination of blood, bone marrow and lymph node cells from 135 patients (90 males and 45 females aged 23-84 years) with chronic B-CLL was made. The patients were followed up from 1 month to 25 years. Before the cytogenetic examination specific therapy was not given. B-CLL was staged by K. Rai, forms--by A.L. Vorobyev and M.D. Brilliant. All the patients have undergone standard cytogenetic examination, FISH with multicolor probe to loci with possible frequent aberrations (del3q14, del11q23, del17p13, trisomia 12), determination of CD38 antigen expression on circulating tumor cells. Mutation status of the genes of immunoglobulins variable region (IgVH) was defined in 61 patients. RESULTS Del13q14 was detected in 34 cases, del11q23--in 26, trisomia of chromosome 12--in 17 cases, del 17p13--in 8, absence of q-arm of chromosome 13--in 3 cases. 61 patients had no karyotype defects. Three prognostic groups of the patients were identified: favourable prognosis--patients without disorders of karyotype and one chromosomal aberration--del13q14; intermediate prognosis patients with dell1q23 and trisomia of chromosome 12; poor prognosis--patients with del17p13 and complex disorders of karyotype. CONCLUSION. Cytogenetic study help determine prognosis of B-CLL and detect patients in need of early therapy.
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