Abstract
The present study aimed to characterize the clinical and molecular-cytogenetic features of non-Hodgkin's lymphoma (NHL) with double translocation of the immunoglobulin heavy chain (IGH) gene. G-banding analysis, fluorescence in situ hybridization (FISH) with the IGH (Cgamma and VH) and oncogene (c-MYC, BCL1, BCL2, and BCL6) probes, and long-distance polymerase chain reaction (LD-PCR) were performed on 6 patients with B-cell lymphoma, one with angioimmunoblastic T-cell lymphoma, and one with acute lymphoblastic leukemia (ALL) with B-cell phenotype. G-banding analysis detected two different 14q32 translocations, t(14,18) and add (14)(q32) in a patient with ALL. Two distinct partners of double IGH translocation identified by FISH were as follows: c-MYC + BCL2 in 3 patients, c-MYC + BCL1 in 2, c-MYC + BCL6 in one, BCL2 + 9q22 in one, and 1q21 + 6q27 in one. Colocalization of BCL1 and c-MYC probes was demonstrated in a patient with mantle cell lymphoma. LD-PCR detected c-MYC/Cmu, c-MYC/Calpha and BCL6/Cmu, and c-MYC/Calpha fusion in each one patient. Seven of 8 patients showed high serum LDH. Central nervous system and leukemic involvement was observed in 5 and 6 patients, respectively. Median survival time of patients with c-MYC/IG...Continue Reading
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