Identify the factors associated with treatment-free remission outcomes after imatinib discontinuation in children and adolescent patients with chronic myeloid leukemia
慧芳 赵, 倩 江, 纬明 黎, 雨 朱, 兵城 刘, 庆曙 曾, 树霞 郭, 立新 梁, 春蕾 张, 璎玲 祖, 永平 宋, 䶮莉 张

TL;DR
This study identifies factors that influence treatment-free remission after stopping imatinib in children and adolescents with chronic myeloid leukemia.
Contribution
The study reveals that the duration of deep molecular response before imatinib discontinuation is a key predictor of treatment-free remission in young CML patients.
Findings
Patients with a deep molecular response for at least 72 months before stopping imatinib had significantly higher treatment-free remission rates.
The overall treatment-free remission rate was 58.3% after a median follow-up of 38 months.
Longer imatinib treatment duration and longer deep molecular response were associated with better outcomes.
Abstract
分析影响儿童及青少年慢性髓性白血病(CML)患者停用伊马替尼(IM)后无治疗缓解(TFR)结局的相关因素。 回顾性纳入2016年12月1日至2024年9月27日国内8家血液中心停用IM且具有明确停药结局的36例儿童及青少年CML患者,分析其临床特征及停药后治疗反应的演变。使用单因素分析和多因素Cox比例风险回归模型评估影响停用IM治疗CML患者TFR结局的相关因素。 36例患者,男17例,女19例。确诊CML时和停用IM时中位年龄分别为11(5,16)岁和20(14,25)岁。IM治疗至首次获得深层分子学反应(Deep molecular response,DMR)的中位时间21(13,38)个月。停IM前,IM中位治疗96(84,121)个月,DMR持续时间74(63,89)个月。停用IM后中位随访38(15,68)个月,6、12、24、36个月时的累积TFR率分别为74.1%、60.7%、60.7%、56.0%,总体的TFR率为58.3%。15例患者在中位停IM治疗5(3,11)个月失去主要分子学反应(MMR)。15例失去MMR患者全部重启酪氨酸激酶抑制剂治疗,13例重启IM治疗,2例重启达沙替尼治疗。至随访结束,13例(86.7%)患者在中位治疗5(3,17)个月重获DMR,至末次随访无患者出现疾病进展。2例(5.6%)患者发生停药综合征。单因素分析结果显示:停IM前IM治疗时间≥100个月组患者的TFR率较<100个月组显著升高(82.4%对36.8%,P=0.017),停IM前DMR持续时间≥72个月组患者的TFR率较<72个月组显著升高(84.2%对29.4%,P=0.003)。多因素分析结果显示:停药前DMR持续时间是影响儿童及青少年CML患者停IM治疗后TFR结局的独立影响因素(HR=5.419,95%CI:1.524~19.272,P=0.009)。 DMR持续时间显著影响儿童及青少年CML患者停IM治疗后TFR结局。停IM前维持DMR≥72个月者TFR率显著提高。
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Taxonomy
TopicsChronic Myeloid Leukemia Treatments · Advanced Breast Cancer Therapies · Acute Myeloid Leukemia Research
