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To  compare the efficiency of novel mitogenic agents and traditional mitosis inductors, 18 patients with splenic marginal zone lymphoma (SMZL) were studied. Three cultures using oligodeoxynucleotide (ODN) plus interleukin-2 (IL-2), or  TPA, or LPS were setup in each patient. Seventeen/18 cases with ODN+IL2 had moderate/good proliferation (94,4%) as compared with 10/18 cases with TPA and LPS (55%) (P=.015); 14/18 (77,7%) cases with ODN+IL2 had sufficient good quality of banding as compared with 8/18 cases (44,4%) with TPA and LPS. The karyotype could be defined from ODN+IL2-stimulated cultures in all 18 patients, 14 of whom (77,7%) had a cytogenetic aberration, whereas clonal aberrations could be documented in 9 and in 3 cases  by stimulation with LPS and TPA, respectively. Recurrent chromosome aberrations in our series were represented by aberrations of chromosome 14q in 5 patients, by trisomy 12 and 7q deletion in 4 cases each, and by abnormalities involving 11q and 13q in two cases each. These findings show that stimulation with ODN+IL2 offers more mitotic figures of better quality and results in an increased rate of clonal aberrations in SMZL, making this method ideal for prospective studies aiming at the definition of the prognostic impact  of cytogenetic aberrations in this disorder

Employment of Oligodeoxynucleotide plus Interleukin-2 Improves Cytogenetic Analysis in Splenic Marginal Zone Lymphoma