Abstract
Background
Pancreatic neuroendocrine tumors (PanNETs) are indolent pancreatic tumors derived from neuroendocrine cells in pancreatic islets. To date, reliable predictors for identifying patients at high risk for recurrence after curative cancer resection are lacking. We aimed to determine independent predictors for high-risk PanNETs and patient outcomes after surgery.
Methods
We analyzed relevant clinicopathological parameters in 319 consecutive patients of derivation cohort 1 and 106 patients of validation cohort 2 who underwent pancreatectomy and were diagnosed with PanNETs. Association of tumor characteristics with recurrence-free survival (RFS) and overall survival (OS) was evaluated using Cox regression.
Results
PanNET grade 3 (G3), pancreatic duct dilatation, and perineural invasion were independent prognostic factors for RFS and were significantly associated with early recurrence (within 1.5 years) of PanNETs after curative resection (P = 0.019, P < 0.001, and P < 0.001, respectively). Using these factors, we established a novel risk factor panel (R-panel), which predicted early recurrence (P < 0.001, HR = 15.02, 95% CI 5.76–39.19). Predictive accuracy of this R-panel was favorable, with a C-index of 0.853, higher than AJCC TNM staging (0.713). We further built an integrated staging system combining R-panel scoring and TNM staging, which improved predictive probability of TNM staging. Finally, we showed that adjuvant therapy with long-acting somatostatin analogs (SSAs) significantly reduced postoperative recurrence (P < 0.001) and prolonged long-term survival (P = 0.021) in patients with the above risk factors.
Conclusion
We identified a novel risk factor panel, which includes PanNET G3, pancreatic duct dilatation, and perineural invasion; this panel predicted early recurrence of PanNETs after curative resection. Patients with these risk factors can benefit from adjuvant therapy with SSAs.
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Acknowledgements
The authors thank Prof. Jie Chen (Department of Gastroenterology, the First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China), Prof. Cheng-Hao Shao (Department of Pancreatic-Biliary Surgery, Shanghai Changzheng Hospital, Second Military Medical University, Shanghai, China), and Prof. Jian Wang (Department of Biliary-Pancreatic Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China), three senior members of the Chinese Study Group for Neuroendocrine Tumor, for providing study materials. We also thank Dr. Kai-Zhou Jin, Ying Yang, and Ms. Huan-Yu Xia (Fudan University Shanghai Cancer Centre) for their assistance in collecting patient data. We thank Prof. Wei-Qi Sheng (Department of Pathology, Fudan University Shanghai Cancer Centre, China) and Prof. Hai-Ying Zeng (Department of Pathology, Zhongshan Hospital, Fudan University, China) for their assistance in the pathological diagnosis of PanNETs in all enrolled patients. Lastly, we thank Prof. Hai-Tao Chen (School of Public Health, Fudan University, China) and Dr. Miao Mo (Department of Clinical Statistics, Fudan University Shanghai Cancer Centre, China) for their assistance with statistical analyses.
Funding
This work was supported by grants from the National Science Foundation for Distinguished Young Scholars of China (81625016), the National Natural Science Foundation of China (81871941, 81872366, 81827807, 81802675, 81701630 and 81702341), the Outstanding Academic Leader Program of the “Technological Innovation Action Plan” in Shanghai Science and Technology Commission (18XD1401200), the Scientific Innovation Project of Shanghai Education Committee (2019-01-07-00-07-E00057), the Natural Science Foundation of Shanghai (19ZR1410800), Clinical and Scientific Innovation Project of Shanghai Hospital Development Center (SHDC12018109), and the Young Talented Specialist Training Program of Shanghai.
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Wang, WQ., Zhang, WH., Gao, HL. et al. A novel risk factor panel predicts early recurrence in resected pancreatic neuroendocrine tumors. J Gastroenterol 56, 395–405 (2021). https://doi.org/10.1007/s00535-021-01777-0
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DOI: https://doi.org/10.1007/s00535-021-01777-0