Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, Washington 98109-1023, USA.
Cancer. 2012 May 1;118(9):2411-9. doi: 10.1002/cncr.26539. Epub 2011 Sep 16.
Cytogenetics and multicolor flow cytometry (MFC) are useful tools for monitoring outcome of treatment in acute myeloid leukemia (AML). However, no data are available regarding the meaning of results when the 2 tests do not agree.
The authors of this report analyzed 1464 pairs of concurrent cytogenetics and flow results from 424 patients, before and after hematopoietic cell transplantation, and compared the prognostic impact of discordant and concordant results.
Informative discordant results were observed in 22% of patients. Compared with patients who had double-negative test results, either positive result had a significant impact on overall survival and relapse-free survival. The hazard ratios with either positive cytogenetic results or positive MFC results pretransplantation were 3.1 (P = .009) and 2.5 (P = .0008), respectively, for reduced overall survival and 2.7 (P = .01) and 4.1 (P < .0001), respectively, for decreased recurrence-free survival. Similar findings were obtained post-transplantation. Molecular cytogenetics, ie, fluorescence in situ hybridization (FISH), added value to the evaluation of discordant cases.
The detection of residual AML by either cytogenetics or flow cytometry in patients who underwent hematopoietic cell transplantation predicted early relapse and shortened survival.
细胞遗传学和多色流式细胞术(MFC)是监测急性髓系白血病(AML)治疗结果的有用工具。然而,当这两种检测方法不一致时,关于结果意义的数据尚不清楚。
本报告的作者分析了 424 例患者造血细胞移植前后 1464 对同时进行的细胞遗传学和流式结果,并比较了不一致和一致结果的预后影响。
在 22%的患者中观察到有意义的不一致结果。与双阴性检测结果的患者相比,任一阳性结果均对总生存和无复发生存有显著影响。移植前阳性细胞遗传学结果或阳性 MFC 结果的风险比分别为 3.1(P =.009)和 2.5(P =.0008),总生存率降低;分别为 2.7(P =.01)和 4.1(P <.0001),无复发生存率降低。移植后也得到了类似的发现。分子细胞遗传学,即荧光原位杂交(FISH),增加了对不一致病例的评估价值。
接受造血细胞移植的患者通过细胞遗传学或流式细胞术检测到残留的 AML 可预测早期复发并缩短生存期。