Abstract
Background
Although there are numerous reports focusing on surgical indication for intraductal papillary mucinous neoplasm (IPMN), the recurrence patterns following surgery are less widely reported. To ascertain optimal treatment and postoperative surveillance for IPMN patients, we analyzed patterns and risk factors for recurrence after surgery for IPMN.
Methods
This study is a retrospective, multi-institutional, observational study, including 1074 patients undergoing surgery for IPMN at 11 academic institutions. We analyzed the risk factors for recurrence after classifying postoperative recurrences into metachronous high-risk lesions (malignant progression of IPMN and/or metachronous pancreatic ductal adenocarcinoma) in the remnant pancreas and extra-pancreatic recurrence.
Results
Of 1074 patients undergoing surgery for IPMN, 155 patients (14.4%) developed postoperative recurrence. We found that 34.3% of 70 high-risk lesions in the remnant pancreas occurred over 5 years after surgery, and survival of 36 patients undergoing second operation for high-risk lesions was better than that of 34 patients who did not (P = 0.04). We found four independent risk factors for metachronous high-risk lesions in remnant pancreas: symptoms [P = 0.005, hazard ratio (HR) 1.988], location of pancreatic body/tail (P < 0.001, HR 3.876), main duct size ≥ 10 mm (P = 0.021, HR 1.900), and high-grade dysplasia/invasive intraductal papillary mucinous carcinoma (IPMC) (P < 0.001, HR 3.204). Although six patients (0.7%) with low- or high-grade dysplasia IPMN developed extra-pancreatic recurrence, invasive IPMC was the strongest risk factor for extra-pancreatic recurrence (P < 0.001, HR 39.667).
Conclusion
We suggest that life-time continuous surveillance might be necessary for IPMN patients. Second surgery for metachronous high-risk lesions in remnant pancreas should be considered to improve survival.
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Abbreviations
- IPMN:
-
Intraductal papillary mucinous neoplasm
- IPMC:
-
Intraductal papillary mucinous carcinoma
- LGD:
-
Low-grade dysplasia
- HGD:
-
High-grade dysplasia
- PDAC:
-
Pancreatic ductal adenocarcinoma
- ICG:
-
International consensus guideline
- EUS:
-
Endoscopic ultrasonography
- CT:
-
Computed tomography
- MRI:
-
Magnetic resonance imaging
- MPD:
-
Main pancreatic duct
- MD type:
-
Main duct type
- BD type:
-
Branch duct type
- CEA:
-
Carcinoembryonic antigen
- CA19-9:
-
Carbohydrate antigen 19-9
- OS:
-
Overall survival
- DFS:
-
Disease-free survival
- LN:
-
Lymph node
- HR:
-
Hazard ratio
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Acknowledgements
This work was supported by Japan Society for the Promotion of Science (JSPS) KAKENHI Grant number JP19K08409. This study supported by the Japan Pancreas Society.
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HY and SH had full access to all data in the study and take responsibility for the integrity of the data and the accuracy of the data analysis. Study concept and design: SH, YS, TO, SH, HY. Acquisition or interpretation of data: SH, YS, TO, TS, SH, AY, MN, KO, HY. Draft of the manuscript: SH, YS, TO, MN, HY. Critical revision of the manuscript for important intellectual content: SH, YS, TO, TS, HY. Administrative, technical, or material support: SH, TO, TK, KH, AK, SK, KH, MK, HI, TI, TU, SH, AY, HY. Study supervision: YS, TO, MN, HY.
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This retrospective study was approved by Internal Review Board of all participating institutes.
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Hirono, S., Shimizu, Y., Ohtsuka, T. et al. Recurrence patterns after surgical resection of intraductal papillary mucinous neoplasm (IPMN) of the pancreas; a multicenter, retrospective study of 1074 IPMN patients by the Japan Pancreas Society. J Gastroenterol 55, 86–99 (2020). https://doi.org/10.1007/s00535-019-01617-2
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DOI: https://doi.org/10.1007/s00535-019-01617-2