Home    中文  
 
  • Search
  • lucene Search
  • Citation
  • Fig/Tab
  • Adv Search
Just Accepted  |  Current Issue  |  Archive  |  Featured Articles  |  Most Read  |  Most Download  |  Most Cited

Chinese Journal of Breast Disease(Electronic Edition) ›› 2025, Vol. 19 ›› Issue (01): 33-38. doi: 10.3877/cma.j.issn.1674-0807.2025.01.006

• Original Articles • Previous Articles     Next Articles

Application of 21-gene recurrence risk score in early breast cancer

Linlin Li1, Xue Bai1, Haidong Zhao1, Xi Liang1, Xuelu Li1,()   

  1. 1.Department of Breast Surgery, Second Affiliated Hospital of Dalian Medical University, Dalian 116027, China
  • Received:2024-07-12 Online:2025-02-01 Published:2025-03-04
  • Contact: Xuelu Li

Abstract:

Objective

To investigate the application of the 21-gene recurrence risk score (RS) in patients with early breast cancer, and analyze its correlation with clinicopathological characteristics and the prognosis.

Methods

Based on the inclusion and exclusion criteria, a total of 122 patients with early breast cancer who underwent surgical treatment and 21-gene testing in the Department of Breast Surgery, the Second Affiliated Hospital of Dalian Medical University from January 2019 to December 2023 were enrolled in this retrospective study. The RS was calculated according to the results of 21-gene testing. All patients were categorized into low-risk group (RS<11), intermediate-risk group (11≤RS<26), and high-risk group (RS≥26). All patients were followed up until May 1, 2024 or until the occurrence of recurrence and metastasis.Information regarding postoperative adjuvant treatment, recurrence, and metastasis was collected. The relationships between RS classification and clinicopathological characteristics, the selection of adjuvant chemotherapy, recurrence, and metastasis were analyzed. For multi-group comparisons of count data, χ2 test or Fisher’s exact test was utilized, while rank data was analyzed using the non-parametric test(Kruskal-Wallis H test) for multiple independent samples. Pair-wise comparisons among multiple groups were corrected by the Bonferroni method. Survival analysis was carried out using the Kaplan-Meier method and Log-rank test.

Results

Among the 122 patients,19 cases were in the low-risk group,69 cases were in the intermediate-risk group, and 34 cases were in the high-risk group, among which 1, 12 and 30 patients received adjuvant chemotherapy. A total of 112 patients (91.8%) had no axillary lymph node metastasis,while 10 patients (8.2%)had axillary lymph node metastasis. Statistically significant differences were observed in age and menstrual status among the three groups (χ2=8.936, 12.738; P=0.011, 0.002). Among the 112 patients with negative lymph nodes, 19 were in the low-risk group, 64 were in the intermediate-risk group, and 29 were in the highrisk group. There were statistically significant differences in age (χ2= 8.916, P=0.012), menstrual status(χ2=12.773, P=0.002), and PR status (P=0.035) among the three groups. The median follow-up time was 26 (12, 36) months. Local recurrence occurred in three cases, all of which were in the high-risk group as determined by 21-gene testing. The recurrence rate of the high-risk group was 8.8% (3/34), and no distant metastasis or death events were recorded. Survival analysis of the 122 patients revealed that there was no statistically significant difference in the DFS curves among the low-risk group, intermediate-risk group, and high-risk group (P = 0.059).

Conclusions

The RS classification based on 21-gene testing can offer a relatively reliable basis for treatment decision-making in patients with early breast cancer.

Key words: Breast neoplasms, Genetic testing, Adjuvant chemotherapy, Prognosis

京ICP 备07035254号-13
Copyright © Chinese Journal of Breast Disease(Electronic Edition), All Rights Reserved.
Tel: 0086-10-51322630 E-mail: jcbd@medmail.com.cn
Powered by Beijing Magtech Co. Ltd