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Chinese Journal of Colorectal Diseases(Electronic Edition) ›› 2022, Vol. 11 ›› Issue (01): 44-53. doi: 10.3877/cma.j.issn.2095-3224.2022.01.007

• Original Article • Previous Articles     Next Articles

The prognostic impact of neoadjuvant therapy response on survival in patients with locally advanced rectal cancer

Enrui Liu1, Xu Guan1, Ran Wei1, Zheng Jiang1, Zheng Liu1, Yinggang Chen2,(), Xishan Wang1,()   

  1. 1. Department of Colorectal Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Bejing 100021, China
    2. Department of Gastrointestinal Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital & Shenzhen Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Shenzhen 518116, China
  • Received:2021-12-26 Online:2022-02-25 Published:2022-03-25
  • Contact: Yinggang Chen, Xishan Wang

Abstract:

Objective

To explore the prognostic impact of neoadjuvant therapy response on survival in patients with locally advanced rectal cancer.

Methods

The clinicopathological data of 218 patients with locally advanced rectal cancer (LARC) who received preoperative neoadjuvant chemoradiotherapy in Cancer Hospital of Chinese Academy of Medical Sciences were retrospectively collected. Patients were divided into good response (TRG3~4) and poor response (TRG0~2) based on Dowrak/R?del tumor regression grade (TRG) criteria. Cox proportional regression univariate and multivariate analyses were performed to identify the influence factors for disease-free survival (DFS) and overall survival (OS). Kaplan-Meier method was used to plot the survival curve and the Log-rank test was used to compare the differences in tumor survival.

Results

A total of 218 patients were enrolled in this study, including 126 patients with good treatment responses and 92 patients with poor treatment responses. Univariate and multivariate Cox regression analysis identified that poor response to neoadjuvant therapy was an independent risk factor for DFS (HR=3.85, 95%CI: 1.40~10.60; P=0.009) and OS (HR=3.81, 95%CI: 1.02~14.20; P=0.046). 5-year DFS was 93.46% in the good response group and 65.04% in the poor response group (χ2=28.23, P<0.001); and 5-year OS were 95.38% in the good response group and 78.99% in the poor response group (χ2=18.51, P<0.001).

Conclusion

Neoadjuvant therapy response was an independent prognostic factor for DFS and OS in locally advanced rectal cancer patients, and good response predicts better oncology prognosis. This study provides a theoretical basis for further clinical research on risk stratification.

Key words: Rectal neoplasms, Locally advanced rectal cancer, Neoadjuvant chemoradiotherapy, Therapy response, Disease-free survival, Overall survival

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