Abstract
Background
Adjuvant chemotherapy is recommended for patients with pancreatic cancer after curative resection. However, there is limited evidence regarding the efficacy and prognostic factors for adjuvant chemotherapy in patients with stage I pancreatic cancer. This study aimed to identify patients in whom chemotherapy was effective and to detect prognostic factors for stage I pancreatic cancer based on guidelines of the 8th edition of the Union for International Cancer Control (UICC).
Methods
Between 2009 and 2017, 108 patients diagnosed with stage I pancreatic cancer were enrolled in this study. They were distributed into invasion (n = 68) and non-invasion (n = 40) groups. The relationship between clinicopathological variables, including various prognostic factors, disease-free survival (DFS), and overall survival (OS), were investigated by univariate and multivariate analyses.
Results
Five-year survival in all patients with stage I pancreatic cancer was 38.9%. Adjuvant chemotherapy failed to improve DFS or OS in patients with stage I cancer (DFS, p = 0.26; OS, p = 0.30). In subgroup analysis, adjuvant chemotherapy significantly improved DFS (multivariate-adjusted hazard ratio (HR), 0.40; 95% confidence interval [CI], 0.21–0.78; p = 0.007) and OS (multivariate-adjusted HR, 0.32; 95% CI, 0.15–0.68; p = 0.003) in the invasion group than in non-invasion group. In contrast, in the non-invasion group, adjuvant chemotherapy failed to improve DFS and OS in univariate analysis (DFS, p = 0.992; OS, p = 0.808).
Conclusion
For stage I pancreatic cancer, based on guidelines of the UICC 8th edition, adjuvant chemotherapy may benefit patients with extrapancreatic invasion.
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Funding
This work was supported by JSPS KAKENHI Grant Number JP21K08805 and by a research grant from the Uehara Memorial Foundation.
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Each of the author have participated sufficiently in the work to take public responsibility for appropriate portions of the content. Study concept and design: Ryoga Hamura, Yuki Fujiwara, Koichiro Haruki. Acquisition of data: Ryoga Hamura, Yoshihiro Shirai, Tadashi Uwagawa, Teruyuki Usuba, Shuichi Fujioka, Tomoyoshi Okamoto. Analysis and interpretation of data: Ryoga Hamura, Yuki Fujiwara. Drafting of manuscript: Ryoga Hamura. Critical revision: Yuki Fujiwara, Koichiro Haruki, Hiroaki Shiba, Toru Ikegami.
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Hamura, R., Haruki, K., Fujiwara, Y. et al. The effectiveness of adjuvant chemotherapy for Stage I pancreatic cancer based on the UICC 8th edition. Langenbecks Arch Surg 407, 3437–3446 (2022). https://doi.org/10.1007/s00423-022-02686-3
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DOI: https://doi.org/10.1007/s00423-022-02686-3