Advances in predicting and managing postoperative pancreatic fistula

A persistent challenge in pancreatic surgery

Postoperative pancreatic fistula (POPF) continues to be one of the most feared complications following pancreatic resection, contributing to prolonged hospitalisation, morbidity and increased healthcare costs. Despite advances in surgical techniques and perioperative care, its incidence remains significant, ranging from 5% to over 30% depending on the procedure type.

A major milestone has been the evolution of standardised definitions. The updated 2016 International Study Group on Pancreatic Surgery (ISGPS) classification distinguishes clinically irrelevant "biochemical leaks" from clinically relevant POPF (grades B and C), allowing better clinical stratification and management.

Understanding the biology of fistula formation

The pathogenesis of POPF is multifactorial and still incompletely understood. Central mechanisms include anastomotic failure, enzymatic autodigestion, ischaemia and postoperative inflammation. Proteolytic enzymes such as trypsin play a key role in tissue breakdown, while bacterial contamination may further exacerbate enzyme activation and worsen outcomes.

Importantly, postoperative pancreatitis is increasingly recognised as a precursor condition, linking acinar cell injury and inflammation to fistula development. This evolving understanding reframes POPF as a dynamic inflammatory process rather than a simple mechanical leak.

Key message: Risk prediction is becoming more precise

Risk factors for POPF span the entire perioperative timeline:

(1) Preoperative: age, male sex, obesity, sarcopenia, comorbidities and pancreatic morphology;

(2) Intraoperative: gland texture, duct size, blood loss, operative time and surgical technique;

(3) Postoperative: infection, drain management and biochemical markers such as amylase and CRP.

These factors are integrated into scoring systems such as the fistula risk score (FRS), which remains widely used but shows reduced accuracy on external validation. Newer models, including CT-based and AI-driven tools, aim to improve predictive performance, though validation challenges persist.

Advances in surgical and perioperative management

Modern management of POPF emphasises individualised and minimally invasive strategies.

(1) Surgical innovations include: Improved anastomotic techniques and stapling indices; Selective drain placement and early removal (within 3 days reduces risk); Use of fluorescence imaging (ICG) to assess perfusion; Increased adoption of minimally invasive and robotic approaches. Notably, laparoscopic techniques may reduce POPF rates through enhanced precision and reduced tissue trauma.

(2) Postoperative management focuses on: Early detection using biomarkers (e.g., drain amylase, CRP); Optimised nutrition (enteral preferred over parenteral); Careful fluid and electrolyte balance; Selective use of somatostatin analogues, though evidence remains mixed. Endoscopic and percutaneous drainage techniques have further reduced the need for reoperation, improving patient outcomes.

Key message: Emerging therapies signal a paradigm shift

Several novel approaches are reshaping POPF prevention and treatment:

(1) Biologic sealants and PGA mesh: reinforce anastomoses and reduce clinically relevant POPF;

(2) Stem cell therapies: promote tissue repair (currently preclinical);

(3) Enzyme-targeting hydrogels: suppress proteolytic activity in experimental models;

(4) 3D printing and personalised surgery: enhance operative planning and precision;

(5) AI-based prediction models: integrate multimodal data for risk stratification.

Clinical trials such as WRAP and FIBROPANC are evaluating these innovations, highlighting a growing move toward precision medicine.

Toward personalised and multidisciplinary care

The review underscores a paradigm shift from reactive to proactive management. Future strategies will likely combine: (1) Advanced imaging and biomarkers; (2) Robust, externally validated prediction models; (3) Tailored surgical and postoperative approaches; (4) Integration of AI and digital tools. Ultimately, improving outcomes in POPF will depend on multidisciplinary collaboration and personalised patient care.

Conclusion

This comprehensive review highlights that while POPF remains a major surgical challenge, significant progress has been made in its prediction, prevention and management. The convergence of surgical innovation, biomarker discovery and emerging technologies is paving the way for more precise and patient-centred care, with the potential to substantially reduce the burden of this complication.

See the article: 

Sherpa P, Stancampiano FF, Stauffer JA, et al. Advancements in postoperative pancreatic fistula: a comprehensive review of predictive factors, therapies, scoring systems and ongoing trials. eGastroenterology 2025;3:e100232. doi:10.1136/egastro-2025-100232

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