原发性皮肤边缘区B细胞淋巴瘤可能同时出现t(14;18)(q32;q21)IGH/BCL2和t(14;18)(q32;q21)IGH/MALT1易位:这是向高级别B细胞淋巴瘤克隆转化的一个指标吗?

Primary cutaneous marginal zone B-cell lymphoma may exhibit both the t(14;18)(q32;q21) IGH/BCL2 and the t(14;18)(q32;q21) IGH/MALT1 translocation: an indicator for clonal transformation towards higher-grade B-cell lymphoma?

作者信息

Palmedo Gabriele, Hantschke Markus, Rütten Arno, Mentzel Thomas, Kempf Werner, Tomasini Dario, Kutzner Heinz

机构信息

DermPath, Friedrichshafen, Germany.

出版信息

Am J Dermatopathol. 2007 Jun;29(3):231-6. doi: 10.1097/DAD.0b013e31804795a6.

Abstract

Primary cutaneous marginal zone B-cell lymphoma (PCMZL) is a recently proposed entity and constitutes the cutaneous counterpart of extranodal marginal zone B-cell lymphoma of mucosa-associated lymphoid tissue (MALT). The t(14;18)(q32;q21) involving the IGH and the MALT1 gene has previously been described in PCMZL, whereas the t(14;18)(q32;q21) IGH/BCL2 seems to be restricted to follicular lymphoma and diffuse large B-cell lymphoma. We screened 30 PCMZLs of 13 patients by fluorescent in situ hybridization analysis for the presence of the t(14;18)(q32;q21) IGH/BCL2 and the t(14;18)(q32;q21)IGH/MALT1. The t(14;18)(q32;q21) IGH/MALT1 was detected in 10 PCMZLs of eight patients, with four patients showing the t(14;18)(q32;q21) IGH/MALT1 exclusively. The t(14;18)(q32;q21)IGH/BCL2 was detected in 16 PCMZLs of seven patients, with four patients showing the t(14;18)(q32;q21) IGH/BCL2 exclusively. Six lymphomas of four patients showed both translocations in the same lesion. In seven lymphomas, neither of the two translocations occurred. One patient developed multiple lesions without either of the two translocations. Our results underline that both the t(14;18)(q32;q21)IGH/BCL2 and the t(14;18)(q32;q21) IGH/MALT1 may occur in PCMZL, albeit in an irregular distribution. Therefore, the etiopathogenetic relevance of either translocation in PCMZL remains a matter of debate.

摘要

原发性皮肤边缘区B细胞淋巴瘤(PCMZL)是最近提出的一种疾病实体,是黏膜相关淋巴组织(MALT)结外边缘区B细胞淋巴瘤的皮肤对应物。先前在PCMZL中已描述了涉及IGH和MALT1基因的t(14;18)(q32;q21),而t(14;18)(q32;q21) IGH/BCL2似乎仅限于滤泡性淋巴瘤和弥漫性大B细胞淋巴瘤。我们通过荧光原位杂交分析对13例患者的30个PCMZL进行筛查,以检测t(14;18)(q32;q21) IGH/BCL2和t(14;18)(q32;q21)IGH/MALT1的存在情况。在8例患者的10个PCMZL中检测到t(14;18)(q32;q21)IGH/MALT1,其中4例患者仅表现出t(14;18)(q32;q21)IGH/MALT1。在7例患者的16个PCMZL中检测到t(14;18)(q32;q21)IGH/BCL2,其中4例患者仅表现出t(14;18)(q32;q21) IGH/BCL2。4例患者的6个淋巴瘤在同一病变中显示出两种易位。在7个淋巴瘤中,未发生两种易位中的任何一种。1例患者出现多个病变,两种易位均未发生。我们的结果强调,t(14;18)(q32;q21)IGH/BCL2和t(14;18)(q32;q21)IGH/MALT1在PCMZL中均可能出现,尽管分布不规则。因此,这两种易位在PCMZL中的病因学相关性仍存在争议。

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