关键词:
Acute myeloid leukemia
Leukemic transformation
Mutation
Myelodysplastic neoplasm/Myelodysplastic syndrome
Prognosis
摘要:
目的: 分析伴急性髓系白血病(AML)样突变的骨髓增生异常肿瘤(MDS)患者的临床和实验室特征及预后。 方法: 收集2016年8月至2024年6月于中国医学科学院血液病医院确诊的1 464例初治成人原发性MDS患者病例资料,回顾性分析伴AML样突变MDS患者临床、分子学特征以及预后情况。 结果: 共64例(4.4%)患者伴有AML样突变。与无AML样突变患者相比,伴AML样突变患者年龄更小[50(39, 60)岁对56(45, 65)岁,P=0.001],女性比例更高(51.6%对35.4%,P=0.009),骨髓原始细胞比例更高[6.5%(3.0%, 10.5%)对2.5%(1.0%, 7.0%),P<0.001],正常核型比例更高(75.0%对48.1%,P<0.001),外周血HGB水平更低[73(67, 82)g/L对80(66, 98)g/L,P=0.006]。伴AML样突变组和无AML样突变组中位基因突变数目分别为3(2,4)、2(1,3)个,差异有统计学意义(P<0.001)。伴AML样突变组NPM1、DNMT3A、WT1、PTPN11、NRAS、BCOR、FLT3、CEBPA、MYC基因突变率显著高于无AML样突变组(均P<0.05),而U2AF1、ASXL1和TP53基因突变率较低(均P<0.05)。伴AML样突变患者总生存(OS)期与无AML样突变患者相比差异无统计学意义(P=0.730),中位无白血病生存(LFS)期显著缩短[19(95%CI:13~25)个月对46(95%CI:38~54)个月,P=0.012],AML转化率显著增高[2年:(41.7±9.1)%对(10.4±1.1)%,P<0.001]。按原始细胞比例分组后,低原始细胞(LB)和原始细胞增多(IB)患者OS、LFS及AML转化率差异均无统计学意义。多因素Cox分析显示,年龄≥60岁和PTPN11突变是影响伴AML样突变患者OS的独立危险因素;DNMT3A突变、PTPN11突变、FLT3突变是伴AML样突变患者发生AML转化的独立危险因素。 结论: 伴AML样突变的MDS患者具有独特的临床和分子学特征,并表现出更高的AML转化风险。.;Objective: To investigate the clinical, laboratory, and prognostic features of myelodysplastic neoplasm (MDS) patients harboring acute myeloid leukemia (AML) -like mutations. Methods: We retrospectively analyzed clinical, molecular, and outcome data from 1 464 adults with primary MDS diagnosed at the Institute of Hematology and Blood Diseases Hospital from August 2016 to June 2024. Results: AML-like mutations were detected in 64 patients (4.4% ). Compared with patients without AML-like mutations, those with AML-like mutations were younger [median 50 (IQR 39-60) vs 56 (45, 65) years;P=0.001], more often female (51.6% vs 35.4%;P=0.009), had higher bone marrow blast percentage [6.5% (3.0%, 10.5% ) vs 2.5% (1.0%, 7.0% );P<0.001], a higher rate of normal karyotype (75.0% vs 48.1%;P<0.001), and lower hemoglobin levels [73 (67, 82) g/L vs 80 (66, 98) g/L;P=0.006]. The AML-like group had a higher number of gene mutations than the non-AML-like group [3 (IQR 2-4) vs 2 (1, 3);P<0.001). It was enriched for mutations in NPM1, DNMT3A, WT1, PTPN11, NRAS, BCOR, FLT3, CEBP