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本帖最后由 期待康复 于 2016-9-13 17:38 编辑
关于malt转化为弥漫大B的后的预后以前的报道有两种截然相反的结论。有的认为转化并不意味不良预后,也有认为转化后预后差。这篇论文为今年发表,以前看到文摘后在该栏目发过帖,最近一位在美国的病友提供了全文,故再完善一下内容。其中有一些图表比较全面的反映malt及malt大B转化的诊断标准、治疗、预后等方方面面。其中提出了诊断时malt与大B共存和诊断malt后再发生转化的差异等。全文较长,以文摘给出大意。至于为什么对转化的后果有如此大的分歧,该文也做了一些分析,但转化后的样本量仍然很少,还有待大样本分析。
Clinicopathological features of histological transformation from extranodal marginal zone B-cell lymphoma of mucosa-associated lymphoid tissue to diffuse large B-cell lymphoma: an analysis of 467 patients.
Maeshima AM, et al. Br J Haematol. 2016.
This study analysed incidence, patient outcome, immunophenotype and prognostic factors of histological transformation (HT) from extranodal marginal zone B-cell lymphoma of mucosa-associated lymphoid tissue (MALT lymphoma) to diffuse large B-cell lymphoma (DLBCL) in 467 patients (median age, 61 years). The primary sites of MALT lymphoma were the stomach (43%), ocular adnexa (25%), lung (8%), systemic (8%) and other tissues (16%). HT occurred in 8% of MALT lymphomas. Risk of HT by 15 years was 5%: 4% in limited-stage diseases (n = 385) and 16% in advanced-stage diseases (n = 56) (P = 0·02). The median time to HT was 48 months (range, 4-139). Five-year progression-free survival (PFS) and overall survival (OS) rates after HT were 80% and 94%, respectively.
467位患者中位年龄61岁,原发部位胃占43%、眼附属器 25%、肺8%、全身性8%、其它组织16%。malt大B转化率为8%。十五年转化率5%,其中早期385例转化率4%,晚期56例转化率16%。中位转化时间48个月,转化后五年PFS和 OS分别为80%和94%。
Immunohistochemical results of DLBCL were as follows: germinal centre B-cell (GCB)/non-GCB, 37%/63%; CD10, 9%; BCL6, 59%; MUM1, 38%; MYC, 42%; BCL2, 35%; Ki67 ≥ 90%, 23%; and CD5, 3%. The majority (75%, 9/12) of GCB-type DLBCLs exhibited CD10(-) , BCL6(+) and MUM1(-) immunophenotypes; the remainder had CD10(+) immunophenotypes. Multivariate analysis revealed that only advanced stage at HT was a significant adverse factor for PFS (P = 0·037). Thus, overall risk of HT was low and prognosis after HT was favourable; however, in advanced-stage cases, risk of HT was relatively high and prognosis was unfavourable.
转化后,生发中心37%、非生发63%。免疫组化阳性率 CD10, 9%; BCL6, 59%; MUM1, 38%; MYC, 42%; BCL2, 35%; Ki67 ≥ 90%, 23%; and CD5, 3%。
总的转化风险低,转化后的预后也比较好。
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