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Hallermann, C. et al.

Hallermann, Kaune, Gesk, Martin-Subero, Gunawan, Griesinger, Vermeer, Santucci, Pimpinelli, Willemze, Siebert, Neumann,

Molecular cytogenetic analysis of chromosomal breakpoints in the IGH, MYC, BCL6, and MALT1 gene loci in primary cutaneous B-cell lymphomas.

Chromosomal translocations affecting the IGH locus and various oncogene loci are recurrent in many types of systemic B-cell lymphomas. Hardly any data exist, however, on such translocations in primary cutaneous B-cell lymphomas (PCBCL). Here, a series of 29 PCBCL was investigated by interphase fluorescence in situ hybridization with probes for the IGH, MYC, BCL6, and MLT1 loci. None of the six follicle center cell lymphomas and nine marginal zone lymphomas showed evidence for any translocation affecting these loci. In contrast, 11 of 14 large B-cell lymphomas of the leg harbored breakpoints in at least one of the loci. Translocations involving the MYC locus were detected in six cases, five of them derived from a MYC/IGH juxtaposition and one from a translocation involving a non-IG gene partner. Rearrangements of the BCL6 locus were detected in five B-cell lymphomas of the leg, and involved IGH (two cases), IGL (one case), and non-IG genes (two cases). This study shows that large B-cell lymphomas of the leg display a pattern of chromosomal translocations similar to their systemic counterparts whereas primary cutaneous follicle center cell lymphomas and marginal zone lymphomas lack these typical chromosomal translocations.[1]

References

Molecular cytogenetic analysis of chromosomal breakpoints in the IGH, MYC, BCL6, and MALT1 gene loci in primary cutaneous B-cell lymphomas. Hallermann, C., Kaune, K.M., Gesk, S., Martin-Subero, J.I., Gunawan, B., Griesinger, F., Vermeer, M.H., Santucci, M., Pimpinelli, N., Willemze, R., Siebert, R., Neumann, C. J. Invest. Dermatol. (2004) [Pubmed]

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