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Chinese Journal of Colorectal Diseases(Electronic Edition) ›› 2024, Vol. 13 ›› Issue (05): 368-374. doi: 10.3877/cma.j.issn.2095-3224.2024.05.003

• Original Articles • Previous Articles     Next Articles

Factors influencing tumor regression grade and prognosis in locally advanced rectal cancer patients after neoadjuvant chemoradiotherapy

Zhexue Wang1, Junge Bai1, Dedi Jiang1, Yuegang Li1, Ming Yang1, Haipeng Chen1,(), Zheng Liu1,()   

  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, Beijing 100021, China
  • Received:2024-07-10 Online:2024-10-25 Published:2024-11-14
  • Contact: Haipeng Chen, Zheng Liu

Abstract:

Objective

To investigate the factors influencing tumor regression grade (TRG)and long-term prognosis in patients with locally advanced rectal cancer (LARC) following neoadjuvant chemoradiotherapy (nCRT),with the aim of identifying patients who can benefit from nCRT and finding accurate prognostic indicators.

Methods

A retrospective analysis was conducted on the clinical data of 136 LARC patients who received nCRT followed by surgery at the Cancer Hospital,Chinese Academy of Medical Sciences from September 2014 to July 2021. Univariate and multivariate logistic regression analyses were performed to evaluate the factors affecting TRG,and Kaplan-Meier survival curves and Cox proportional hazards regression models were used to analyze factors influencing overall survival (OS).

Results

Univariate analysis revealed that mesorectal fascia (MRF) and extramural vascular invasion(EMVI) were significant factors affecting TRG (MRF: χ2=13.072,P<0.001; EMVI: χ2=8.397,P=0.004).Multivariate logistic regression analysis indicated that MRF (OR=3.277,95%CI: 1.190~9.606,P=0.024)significantly influenced TRG. Univariate Cox regression analysis showed that MRF (HR=4.555,95%CI:1.249~16.620,P=0.022) and CA19-9 (HR=10.057,95%CI: 2.983~33.909,P<0.001) significantly influenced OS. Multivariate Cox regression analysis further confirmed that MRF (HR=5.755,95%CI: 1.549~21.376,P=0.009) and CA19-9 (HR=13.331,95%CI: 3.802~46.700,P<0.001) were independent predictors of OS.

Conclusion

MRF and CA19-9 are important factors influencing tumor regression and prognosis in LARC patients after nCRT. Clinical focus should be on MRF and CA19-9 positive patients to optimize individualized treatment strategies,thereby improving treatment outcomes and patient survival.

Key words: Rectal neoplasms, Locally advanced rectal cancer, Neoadjuvant chemoradiotherapy, Tumor regression grade, Overall survival

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