Tumor regression pattern may impact the prognosis of rectal cancer patients with tumor regression grade 1 after neoadjuvant chemoradiotherapy
Yuan-Ling Tang1
Ji-Tao Zhou1
Xia-Fei Gu2
Li-Juan Yang2
Dan-Dan Li1
Jia-Yu Duan1
Dan Jiang2
Xin Wang1
1.Department of Abdominal Cancer,Cancer Center,West China Hospital,Sichuan University,Chengdu,Sichuan,P.R.China;Department of Radiation Oncology,Cancer Center,West China Hospital,Sichuan University,Chengdu,Sichuan,P.R.China2.Department of Pathology,West China Hospital,Sichuan University,Chengdu,Sichuan,P.R.China
摘要：Background:Tumor regression grade(TRG)is evaluated by calculating the proportion of residual tumor to stromal fibrosis,which can reflect the tumor response to neoadjuvant chemoradiotherapy(NCRT)in patients with locally advanced rectal cancer(LARC).Overall,patients with TRG1 show good sensitivity to NCRT but the long-term survival for these patients remains different.This study aimed to assess the prognostic factors in patients with TRG1.
Methods:LARC patients who underwent NCRT and radical surgery were included.TRG was evaluated according to the National Comprehensive Cancer Network guidelines.The association between clinicopathological factors and survival outcomes was assessed in patients with TRG1.Overall survival(OS)and disease-free survival(DFS)were evaluated using both Kaplan-Meier analyses and Cox proportional hazards models.
Results:Of the 393 LARC patients,104(26.5%)were diagnosed with TRG1.The 5-year OS rates and 5-year DFS rates of patients with TRG1 were 90.9%and 72.2%,respectively.In patients with TRG1,the tumor regression pattern(P¼0.001),pathologic tumor node metastasis(TNM)stage(P¼0.002),neoadjuvant rectal score(P¼0.024),T downstaging(P¼0.022),and baseline carcinoembryonic antigen level(P¼0.038)were associated with DFS in univariate analysis.Only the tumor regression pattern showed prognostic significance for DFS in multivariate analysis(P¼0.003).The group with tumor shrinkage had a higher OS rate than the tumor fragmentation group but the differ-ence in the OS rates between the two groups was not significant(P¼0.196).
Conclusions:TRG could be a prognostic variable for LARC patients receiving NCRT.In patients with TRG1,the tumor regression pattern may represent another useful prognostic factor to better individualize the prognosis.
机标关键词：radiotherapyprognosisgradetumorcancerimpactafterchem
论文发表日期：2024-10-30
在线出版日期：2026-07-17（本平台首次上网日期，不代表文献的发表时间）
页数：7( 475-481 )
英文信息