The Innovation (May 2023)

Etoposide, dexamethasone, and pegaspargase with sandwiched radiotherapy in early-stage natural killer/T-cell lymphoma: A randomized phase III study

  • Huijuan Zhong,
  • Shu Cheng,
  • Xi Zhang,
  • Bing Xu,
  • Jiayi Chen,
  • Xufeng Jiang,
  • Jie Xiong,
  • Yu Hu,
  • Guohui Cui,
  • Juying Wei,
  • Wenbin Qian,
  • Xiaobing Huang,
  • Ming Hou,
  • Feng Yan,
  • Xin Wang,
  • Yongping Song,
  • Jianda Hu,
  • Yuanhua Liu,
  • Xuejun Ma,
  • Fei Li,
  • Chongyang Wu,
  • Junmin Chen,
  • Li Yu,
  • Ou Bai,
  • Jingyan Xu,
  • Zunmin Zhu,
  • Li Liu,
  • Xin Zhou,
  • Li Huang,
  • Yin Tong,
  • Ting Niu,
  • Depei Wu,
  • Hao Zhang,
  • Chaofu Wang,
  • Binshen Ouyang,
  • Hongmei Yi,
  • Qi Song,
  • Gang Cai,
  • Biao Li,
  • Jia Liu,
  • Zhifeng Li,
  • Rong Xiao,
  • Luqun Wang,
  • Yujie Jiang,
  • Yanyan Liu,
  • Xiaoyun Zheng,
  • Pengpeng Xu,
  • Hengye Huang,
  • Li Wang,
  • Saijuan Chen,
  • Weili Zhao

Journal volume & issue
Vol. 4, no. 3
p. 100426

Abstract

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Methotrexate, etoposide, dexamethasone, and pegaspargase (MESA) with sandwiched radiotherapy is known to be effective for early-stage extranodal natural killer/T-cell lymphoma, nasal type (NKTCL). We explored the efficacy and safety of reduced-intensity, non-intravenous etoposide, dexamethasone, and pegaspargase (ESA) with sandwiched radiotherapy. This multicenter, randomized, phase III trial enrolled patients aged between 14 and 70 years with newly diagnosed early-stage nasal NKTCL from 27 centers in China. Patients were randomly assigned (1:1) to receive ESA (pegaspargase 2,500 IU/m2 intramuscularly on day 1, etoposide 200 mg orally, and dexamethasone 40 mg orally on days 2–4) or MESA (methotrexate 1 g/m2 intravenously on day 1, etoposide 200 mg orally, and dexamethasone 40 mg orally on days 2–4, and pegaspargase 2,500 IU/m2 intramuscularly on day 5) regimen (four cycles), combined with sandwiched radiotherapy. The primary endpoint was overall response rate (ORR). The non-inferiority margin was −10.0%. From March 16, 2016, to July 17, 2020, 256 patients underwent randomization, and 248 (ESA [n = 125] or MESA [n = 123]) made up the modified intention-to-treat population. The ORR was 88.8% (95% confidence interval [CI], 81.9–93.7) for ESA with sandwiched radiotherapy and 86.2% (95% CI, 78.8–91.7) for MESA with sandwiched radiotherapy, with an absolute rate difference of 2.6% (95% CI, −5.6–10.9), meeting the non-inferiority criteria. Per-protocol and sensitivity analysis supported this result. Adverse events of grade 3 or higher occurred in 42 (33.6%) patients in the ESA arm and 81 (65.9%) in the MESA arm. ESA with sandwiched radiotherapy is an effective, low toxicity, non-intravenous regimen with an outpatient design, and can be considered as a first-line treatment option in newly diagnosed early-stage nasal NKTCL.