Improving long-term outcomes in resectable pancreatic cancer
The adjuvant chemotherapy paradigm for resectable pancreatic cancer
Bertolo and colleagues in an accompanying commentary highlight the significant therapeutic advances in pancreatic cancer [pancreatic ductal adenocarcinoma (PDAC)] and the evolving landscape for adjuvant treatment which continues to evolve, with the latest trials introducing novel immunologic and targeted strategies (1). Nakasone and Coveler in a further commentary refer to the growing use of neoadjuvant and perioperative chemotherapy largely based on retrospective studies introducing a significant area of controversy (2). The biggest advance in pancreatic cancer surgery since Whipple et al. published the successful two-stage resection of three patients with cancer of the ampulla of Vater in 1935 was the pivotal European Study Group (ESPAC) ESPAC1 and ESPAC1-Plus trials published in the Lancet and New England Journal of Medicine in 2001–2004 (3-5). ESPAC has uniquely and fundamentally changed the treatment of pancreatic cancer. The overall survival (OS) rates improved from <10% to 30–50% with adjuvant chemotherapy, but not chemoradiotherapy for empirically determined resectable (EmR) PDAC (4-16). Empirically (Em) derived stage concepts (presently based on external cross sectional imaging) will continue to evolve with new empirical knowledge (new imaging modalities, circulating tumor sequencing, artificial intelligence, etc.), and so will never reach a steady state but the Em-derived concepts remain sound (14). The Em derived stage concept embraces systems such as the Isaji et al. international ABC consensus, which combines three dimensions, anatomical (A), biological (B) and conditional (C) (17). Even so C is performance status defining fitness for surgery (so not actually tumor staging) and B is not true biology but a carbohydrate antigen 19-9 (CA19-9) somewhat arbitrary cut level of 500 KU/L, so Isaji et al. conclude that it is “controversial and there is the need for further improvements” (17). The ESPAC-based paradigm caused a rapid expansion in the number of pancreatic cancer resections being undertaken, which led to overall 5-year survival rates improving from <5% to 8% for all stages of pancreatic cancer (4-14,16,18-27) (Table 1). Without surgical resection there are no 5-year survivors for any type of chemotherapy with or without the latest targeting agents.
Table 1
| Trial | Recruitment period | Treatment arms | Number of patients | mOS (months) | P for mOS | 5-year overall survival (%) | Comments |
|---|---|---|---|---|---|---|---|
| ESPAC1Plus (4)† | 1994–2000 | No CRT; CRT | 178; 175 | 16.1; 15.5 | 0.24 | 19.5; 10.3 | ECOG 0, 1, 2; R0/R1. Significant for chemotherapy overall but not in the 2×2 factorial. Not significant for CRT overall or in 2×2 factorial |
| No chemotherapy; 5FU/FA | 235; 238 | 14.0; 19.7 | <0.001 | 9.9; 23.3 | |||
| ESPAC1 (5)‡ | 1994–2000 | No CRT; CRT | 144; 145 | 17.9; 15.9 | 0.05 | 19.6; 10.8 | ECOG 0, 1, 2. R0/R1 |
| No chemotherapy; 5FU/FA | 142; 147 | 15.5; 20.1 | 0.009 | 8.4; 21.1 | |||
| Observation; CRT; 5FU/FA; CRT + 5FU/FA | 69; 73; 75; 72 | 16.9; 13.9; 21.6; 19.9 | – | 10.7; 7.3; 29.0; 13.2 | |||
| CONKO-001 (6,9) | 1998–2004 | GEM | 179 | 22.8 | 0.01 | 20.7 | Post-op CA19-9>92.5 KU/L=0.0% |
| Observation | 175 | 20.2 | 10.4 | ||||
| EORTC40891 (18) | 1987–1995 | CRT | 60 | 24.5 | 0.099 | 20 | T1–2, N0–1a, M0 pancreatic head cancer |
| Observation | 54 | 19 | 10 | ||||
| RTOG 9704 (19,20) | 1998–2002 | 5FU/FA, 5FU+RT, 5FU/FA | 230 | – | 0.34 | – | Median survival only reported in 388 with pancreatic head tumors=20.5 (GEM) vs. 16.9 (5FU) months, P=0.09 |
| GEM, 5FU-RT, GEM | 221 | ||||||
| ESPAC3 (8) | 2000–2007 | 5FU/FA | 551 | 23.0 | 0.39 | 15.9 | ECOG 0, 1, 2; R0/R1 |
| GEM | 537 | 23.6 | 17.5 | ||||
| JSAP-02 (21) | 2002–2005 | GEM + IORT in 27 | 58 | 22.3 | 0.19 | 23.9 | Karnofsky >50 |
| IORT in 47 then observation | 60 | 18.4 | 10.6 | ||||
| CapRI (22) | 2004–2007 | 5FU, cisplatin, IFNα2b + RT, CI 5FU | 64 | 32.1 | 0.49 | 25 | ECOG 0,1,2; R0/R1 |
| 5FU/FA | 68 | 25.5 | 25 | ||||
| JASPAC-01 (10) | 2007–2010 | GEM | 190 | 25.2 | <0.0001 | 24.4 | ECOG 0=68.7%; post-op CA19-9 >37 KU/L =21%; R1 pos. =31%; LN pos. =62.9% |
| S-1 | 187 | 46.5 | 44.1 | ||||
| CONKO-005 (23) | 2008–2013 | GEM | 217 | 26.2 | 0.06 | 20.0 | Karnofsky PS ≥60%. Only R0 resected patients |
| GEM-erlotinib | 219 | 24.5 | 25.0 | ||||
| CONKO-006 (24) | 2008–2013 | GEM | 65 | 17.1 | 0.94 | – | Karnofsky PS ≥60%. Only R1 patients |
| GEM-sorafenib | 57 | 18.2 | |||||
| ESPAC4 (11,16) | 2008–2014 | GEM | 366 | 28.4 | 0.03 | 25.0 | R0 and R1 patients |
| GEMCAP | 365 | 31.6 | 32.0 | ||||
| NRG Oncology/ RTOG 0848 (25,26)§ | 2009–2014 | GEM | 163 | 29.9 | 0.62 | – | Post-op. CA 19-9 <180 KU/L. Step 1: 5 cycles GEM +/−erlotinib. Step 2: 6th cycle GEM +/−CRT. 1-sided test |
| GEM + erlotinib | 159 | 28.1 | – | ||||
| Chemotherapy | 174 | 31.0 | 0.38 | 23.0 | |||
| Chemotherapy +CRT | 180 | 27.0 | 28.0 | ||||
| PRODIGE-24 (12,14) | 2012–2016 | GEM | 246 | 35.5 | 0.001 | 31.4 | ECOG 0, 1. Post-op CA 19-9 <180 KU/L. <80 years |
| mFOLFIRINOX | 247 | 53.5 | 43.2 | ||||
| APACT (27) | 2014–2018 | GEM | 434 | 37.7 | 0.009, not primary end point | 31.0 | ECOG 0, 1; post-op CA 19-9<100 KU/L; primary endpoint DFS, not met. 18.0 (GEM) vs. 19.4 (GEM + NabP) months, P=0.18 |
| GEM-NabP | 432 | 41.8 | 38.0 |
†, all patients and early follow-up of 2×2 factorial patients. ‡, 2×2 factorial, final follow-up. §, 2-step trial. 5FU, 5-fluorouracil; CA19-9, carbohydrate antigen 19-9; CAP, capecitabine; CI, continuous infusion; CRT, chemoradiotherapy; CTX, chemotherapy; DFS, disease-free survival; DOX, doxorubicin; ECOG, Eastern Cooperative Oncology Group; FA, folinic acid; GEM, gemcitabine; IORT, intra-operative radiotherapy; LN, lymph node; mFOLFIRINOX, modified FA, 5FU, irinotecan and oxaliplatin; mOS, median overall survival; NabP, nab-paclitaxel; pos., positive; post-op, post-operative; PS, performance status; RT, radiotherapy.
ESPAC1 and ESPAC1-Plus showed that post-operative adjuvant chemotherapy based on using only 5-fluorouracil (5FU) monotherapy (with the 5FU enhancer leucovorin) but not radiochemotherapy substantially improved overall and 5-year survival rates compared to surgical removal alone (4,5). Further randomized trials adopting the evolving the contemporary standard of care (SOC) as the control arm in each case came from the ESPAC, Charité Onkologie (CONKO) and the Japan Adjuvant Study Group of Pancreatic Cancer (JASPAC) teams have confirmed the survival advantage of adjuvant monochemotherapy not only with 5FU but also with gemcitabine, and the oral agent S1 actually comprising tegafur (a 5FU prodrug), plus the enhancers and toxicity modifiers gimeracil, and oteracil potassium (6,9,10). The ESPAC3 trial definitively showed that gemcitabine did not have longer survival than 5FU, but was preferred because of the lower toxicity (8). These trials then evolved into adjuvant combination chemotherapy regimens providing even greater overall and 3–5-year survival rates. The ESPAC4 study showed improved OS with the GemCap combination of gemcitabine with the oral 5FU prodrug capecitabine in patients with relatively unrestricted eligibility criteria with no upper age limit and no constraints on serum CA19-9 levels (11,16). The France-Canada PRODIGE24-CCTG PA.6 trial demonstrated even better overall survival using modified (m) FOLFIRINOX [comprising 5FU, folinic acid (FA), irinotecan, and oxaliplatin] but with greater toxicity necessitating more stringent selection criteria, requiring patients aged <79 years, with a World Health Organisation (WHO) performance status of 0–1, no significant cardiovascular disease, and a postoperative serum tumor marker CA19-9 level <180 KU/L (12,14). This additional toxicity may result in <50% of patients receiving adjuvant mFOLFIRINOX, falling to less than 10% of those aged >70 years (12,14). The long-term follow-up study of ESPAC4 showed that 26% of patients not conforming to the eligibility criteria for mFOLFIRINOX, benefited from GemCap with improved survival and should be used in preference to gemcitabine monotherapy in this setting (16). The APACT study comparing gemcitabine plus nab-paclitaxel (Gem-NabP) against gemcitabine did not meet its primary end point of independently assessed median disease-free survival (DFS) and OS was not significantly different initially but was on further follow-up (27). This emphasizes that surrogate endpoints such as DFS and local investigator versus independent review may be unreliable requiring the use of OS as the hard primary end-point. Gem-NabP is not approved by the Food and Drug Administration (FDA) as adjuvant therapy for pancreatic cancer. Current guidelines emphasize that mFOLFIRINOX is the established reference standard for fit patients, with GemCap as an option typically for patients not eligible for, or choosing not to have, mFOLFIRINOX (28,29).
Emerging role for neoadjuvant therapy in borderline resectable but not for resectable pancreatic cancer
There is emerging evidence to support the use of short course neoadjuvant therapy in patients with Em determined borderline resectable (EmBR), notably PREOPANC1 and ESPAC5 (Table 2) (30-40). There is however no robust evidence to support the use of neoadjuvant therapy for EmR pancreatic cancer (Table 3) (41-44). Clonal evolutionary biology demonstrates that patients with EmBR are distinct from EmR pancreatic cancers with differential responses to therapeutic intervention (45-50). Before ESPAC1 and the subsequent evolutionary trials, chemoradiotherapy was a “popular” treatment of pancreatic cancer being promoted in all kinds of clinical scenarios and in various ways. Whilst there may be a role for chemoradiotherapy in PDAC it has yet to be demonstrated to improve survival in any randomized trial compared to the respective SOC and has been largely abandoned for this purpose in patients with either EmR or EmBR tumors (4,5,18,25,26,31,32,37,41,42,44). The latest “popular” treatment is the use of neoadjuvant therapy, not only in the EmBR population in which we can see a survival benefit but also in the EmR population where its role remains unproven (Tables 2,3) (30-44).
Table 2
| Trial | Recruitment period | Treatment arms | Number of patients | mOS (months) | P for mOS | Comments |
|---|---|---|---|---|---|---|
| PACT-15 (30) | 2010–2015 | PEXG + surgery + PEXG | 26 | – | – | <75 years, stage I–II, protocol event-free at 1-year: 6 (23%, 95% CI: 7–39%) of 30; 15 (50%, 95% CI: 32–68%) of 30; 19 (66%, 95% CI: 49–83%) of 29 |
| Surgery + GEM | 30 | |||||
| Surgery + PEXG | 32 | |||||
| PREOPANC1 (31,32) | 2013–2017 | CRT + GEM + Surgery + GEM | 65 | 14.6 | 0.83 | Longterm follow-up mOS HR =0.79 (95% CI: 0.54–1.16) |
| Surgery + GEM | 68 | 15.6 | ||||
| SWOG S1505 (33) | 2015–2018 | mFOLFIRINOX + surgery + mFOLFIRINOX | 55 | 23.2 | Not significant | Primary end point >2-year OS of 40%: 47% (95% CI: 31–61%) for arm 1 and 48% (95% CI: 31–63%) for arm 2 |
| GEM-NabP + surgery + GEM-NabP | 47 | 23.6 | ||||
| NEONAX-AIO-PAK-0313 (34) | 2015–2021 | GEM-NabP + surgery + GEM-NabP | Resected 48/63 | 25.2 | Not significant | Planned 166 patients. Primary endpoint median DFS rate of 55% at 18 months double negative result: neoadjuvant 32.2%; adjuvant 41.4% |
| Surgery + GEM | Resected 51/64 | 16.7 | ||||
| PANACHE01-PRODIGE48 (35) | 2017–2020 | mFOLFIRINOX+ surgery + CTX | 72 | 31.3 (90% CI: 21.5–NR) | Not significant | CTX = initially GEM, 5FU, and GEM CAP, but latterly and mostly mFOLFIRINOX |
| FOLFOX + surgery + CTX | 48 | 31.8 (90% CI: 23.8–NR) | ||||
| Surgery + CTX | 28 | NR (90% CI: 18.5–NR) | ||||
| NORPACT-1 (36) | 2017–2021 | mFOLFIRINOX + surgery + mFOLFIRINOX | 77 | 25.1 | 0.05 | Primary endpoint was patients alive at 18 months: 60% in the neoadjuvant group versus 73% in the upfront surgery group (P=0.03); upfront surgery had longer survival |
| Surgery + mFOLFIRINOX | 63 | 38.5 | ||||
| PREOPANC2 (37) | 2018–2021 | FOLFIRINOX + surgery | Resected 99/120 | – | – | For all cases mixed resectable and borderline median survival =21.9 months chemo vs. 21.3 months CRT, P=0.32 |
| GEM + CRT + surgery+ GEM | Resected 95/121 |
|||||
| NEPAFOX (38) | 2015–2018 | Surgery + GEM mFOLFIRINOX + | 21 | 25.7 | – | Mixed resectable (76%) and borderline resectable (79%); trial closed due to slow accrual target =126 patients |
| Surgery + mFOLFIRINOX | 19 | 10.0 | ||||
| Prep-02/JSAP-05 (39) | 2013–2016 | GEM + S1 + surgery+ S1 | 131 | HR =0.73 (95% CI: 0.56–0.95) | 0.02 | Adjuvant CTX “advised”—not required. ECOG =0/1, <80 years. The study includes both resectable (n=163) and borderline (n=68), results are not cleanly separated |
| Surgery + S1 | 132 | |||||
| Zhejiang (40) | 2018–2024 | GEM-NabP+ mFOLFIRINOX+ Surgery+ Gem-CAP or mFOLFIRINOX | Resected 135/162 | 35.4 (95% CI: 27.9–5.1) | 0.048 | Left pancreatectomies in 147 (52%); CA19-9>500 KU/L in 138 (43%); R0 in 237 (83%). CTX “recommended” not required; 169 (52%) “completed” CTX. Short follow-up median =18.7 months |
| Surgery+ Gem-CAP or mFOLFIRINOX | Resected 149/162 | 27.2 (95% CI: 19.8–33.5) |
5FU, 5-fluorouracil; CA19-9, carbohydrate antigen 19-9; CAP, capecitabine; CI, confidence interval; CRT, chemoradiotherapy; CTX, chemotherapy; DFS, disease-free survival; ECOG, Eastern Cooperative Oncology Group; GEM, gemcitabine; GEM-NabP, gemcitabine-nab-paclitaxel; HR, hazard ratio; mFOLFIRINOX, modified folinic acid, 5FU, irinotecan and oxaliplatin; mOS, median overall survival; NR, not reached; PEXG, cisplatin, epirubicin, gemcitabine, and capecitabine.
Table 3
| Trial | Recruitment period | Treatment arms | Number of patients | mOS (months) | P for mOS | Comments |
|---|---|---|---|---|---|---|
| Korea multi-center (41) | 2012–2014 | CRT + GEM + surgery + GEM + CRT | 27 [8] | 21 | 0.03 (one-sided) | Target =110 patients; only 8 and 6 patients, respectively, had per-protocol treatment; pre-planned P value not valid |
| Surgery + GEM + CRT | 23 [6] | 12 | ||||
| PREOPANC1 (31,32) | 2013–2017 | CRT + GEM + surgery + GEM | 54 | 17.6 | 0.03 | HR =0.62 (95% CI: 0.40–0.95) |
| Upfront resection + GEM | 59 | 13.2 | ||||
| ESPAC5 (42) | 2014–2018 | Surgery + adjuvant | 32 | – | <0.001 | Primary end point, 1-year OS: immediate surgery =40% (95% CI: 26–62%) and 77% (95% CI: 66–89%) for neoadjuvant therapy |
| GEM + CAP + surgery + adjuvant | 20 | |||||
| FOLFIRINOX + surgery + adjuvant | 20 | |||||
| CAP + CRT + surgery + adjuvant | 16 | |||||
| NUPAT-01 (43) | 2015–2020 | FOLFIRINOX + surgery + CTX | 26 | – | – | Primary end point R0 resection rate: 73.1% for FOLFIRINOX, 56.0%%, for Gem-NabP; 3-year OS =55.3% for FOLFIRINOX and 54.4% for Gem-NabP |
| GEM-NabP + surgery + CTX | 25 | |||||
| Alliance A021501 (44) | 2016–2019 | mFOLFIRINOX + surgery + adjuvant | 54 | 31.0 | Not significant | Primary endpoint, 18 months OS: 93.1% (95% CI: 84.3–100%) and 78.9% (95% CI: 62.6–99.6%), respectively |
| mFOLFIRINOX + SBRT + surgery + adjuvant | 56 | 17.1 |
CAP, capecitabine; CI, confidence interval; CRT, chemoradiotherapy; CTX, chemotherapy; GEM, gemcitabine; Gem-NabP, gemcitabine-nab-paclitaxel; HR, hazard ratio; mFOLFIRINOX, modified folinic acid, 5-fluorouracil, irinotecan and oxaliplatin; mOS, median overall survival; SBRT, stereotactic body radiotherapy.
A number of studies have caused considerable confusion in interpretation by combining recruitment of patients with both EmR and EmBR tumors and/or failing to include the contemporary SOC as the control arm from which inappropriate conclusions are drawn. These studies include PREOPANC1, PREOPANC2, Prep-02/JSAP05 and most recently PACT21-CASSANDRA. In PREOPANC1 the results are sufficiently discriminatory so it can be seen that a neoadjuvant therapy survival benefit is seen in the patients with EmBR tumors but not those with EmR (31,32,37,39,51). The PREOPANC2 trial compared neoadjuvant full-dose FOLFIRINOX but with no scheduled adjuvant chemotherapy versus neoadjuvant chemoradiotherapy and gemcitabine plus adjuvant gemcitabine in both EmR and EmBR patients with no significant differences in OS (37). Again there was no proper control group for the EmR patients which is resection followed by 6 months adjuvant mFOLFIRINOX and survival estimates separated for resected EmR, EmBR, FOLFIRINOX, and chemoradiotherapy groups were not provided inhibiting inter-trial comparisons (37).
In the neoadjuvant Prep-02/JSAP05 trial patients were only “strongly advised” to take adjuvant therapy but were not required to do so, thus lacking a SOC control arm with a vague distinction between EmR and EmBR and an absence of does intensities (39). Remarkably the protocol is not available and there is no mention of the statistical analysis plan. The CASSANDRA “2×2 factorial” superiority trial was conducted in 260 patients with EmR/EmBR PDAC tumors aged <75 years, but lacking a SOC control (51). In the first randomization patients were enrolled to either four months induction PAXG (capecitabine, cisplatin, nab-paclitaxel, and gemcitabine) or to four months induction mFOLFIRINOX. Then in the second randomization they were allocated to either two more months of chemotherapy before surgery and no further chemotherapy or surgery followed by two months adjuvant chemotherapy. The primary endpoint was event-free survival (EFS) using methodology that has not been previously validated. The preliminary findings of the first randomization were presented at ASCO 2025 (LBA4004), and were not significantly different for OS, even though interim analyses were not allowed for. This is not a “2×2 factorial” design, rather it is two staggered randomizations. OS will be reported (again) after 173 deaths but this is not specified in the sample size calculation, and with no alpha adjustment for multiplicity (51). The second randomization is on a different population due to the dropouts, which makes interpretation muddled. Remarkably CASSANDRA had exactly 63 resectable cases in each of the two arms even though this was not a stratification factor (screening numbers are missing). This is a phase II not III study, and without independent data and safety monitoring (51).
The recent single center study from Zhejiang University Hospital, Hangzhou, randomized 324 patients with EmR PDAC to neoadjuvant Gem-NabP plus mFOLFIRINOX or upfront surgery (40). Adjuvant GemCap was only “recommended” for both groups but not required (40). Only 169 (52%) patients randomized “completed” chemotherapy: 89 patients (55%) in the neoadjuvant group and 80 patients (49%) in the upfront surgery group and most importantly no total dose intensities for either group were provided. The median OS was 35.4 months in the neoadjuvant therapy group versus 27.2 months in the upfront surgery group (P=0.048) (40). The conclusions of this trial are further questionable, being potentially biased as an open labelled single center trial, unspecified adjuvant therapy, by the short median follow-up (18.7 months), a high proportion of patients with a CA19-9>500 KU/L (in 138, 43%), an unusually high R0 rate (in 237, 83%), and a very high proportion of left pancreatectomies (in 147, 52%) (40). The NORPACT-1 multicenter trial from hospitals in Denmark, Finland, Norway, and Sweden, that randomized patients with EmR PDAC to receive either neoadjuvant mFOLFIRINOX or upfront surgery group followed by adjuvant chemotherapy found that the upfront surgery group had longer survival (36).
What matters for patients with pancreatic cancer is OS, and in its absence great caution needs to be taken in interpreting surrogate markers, especially in the neoadjuvant setting which do not have the same reliability as in the adjuvant setting (50). Retrospective studies based on registries and single center studies are invariably circumspect because of the considerable bias involved in patient selection and investigator interpretation, for example in the criteria selection bias employed in multivariate models.
The PANACHE01-PRODIGE48 trial is cited by Nakasone and Coveler in support of neoadjuvant therapy in EmR patients with an improved EFS in both of the neoadjuvant mFOLFIRINOX and FOLFOX groups compared to the upfront surgery-adjuvant group (2,35). Importantly however there was no significant difference in median OS 31.3 months [95% confidence interval (CI): 21.5–not reached], 31.8 months (95% CI: 23.8–not reached), and not reached (95% CI: 18.5–not reached) in the three arms respectively, and if anything, the upfront surgery group having the longer survival (35).
State of the art
Clearly further trials such as Alliance A021806 phase III trial (NCT04340141) and PREOPANC3 (NCT04927780) trials will add to the body of knowledge but as the evidence stands the SOC is adjuvant chemotherapy for EmR and short course neoadjuvant therapy for EmBR. We fully concur with Nakasone and Coveler on the importance of the application of (genuine) tumor biology to treatment selection for chemotherapy as investigated in the COPMPASS and NeoPancOne studies as well refining the role of circulating CA19-9 (2,52,53). The ESPAC6 randomized adjuvant trial in EmR (NCT05314998) will investigate a transcriptomic signature in the experimental arm to allocate patients to either mFOLFIRINOX or GemCap against the mFOLFIRINOX control arm. These are also exciting times in terms of the latest developments of drugs targeting major tumor drivers such as KRAS and c-MYC or vulnerabilities like homologous recombination deficiency and methylthioadenosine phosphorylase (MTAP) deletions as well as a variety of immunotherapies (54-57). Each must be objectively evaluated in randomized trials drawing on the lessons of the many false dawns of the past 30 years following the breakthrough of whole genome sequencing (58,59). For now only the correct sequential use of surgery and systemic chemotherapy provides the best probability towards the prime objective of long-term cure albeit with only 30–50% long term survivors (60).
Acknowledgments
None
Footnote
Provenance and Peer Review: This article was commissioned by the editorial office, Annals of Pancreatic Cancer. The article did not undergo external peer review.
Funding: None.
Conflicts of Interest: All authors have completed the ICMJE uniform disclosure form (available at https://apc.amegroups.com/article/view/10.21037/apc-25-42/coif). J.P.N. receives grants from Heidelberger Stiftung Chirurgie, Stiftung Deutsche Krebshilfe, Dietmar Hopp Stiftung GmbH, and the Bundesministerium für Bildung und Forschung; patent for: Metavert, APO-01; and served on advisory board for BioNTech Advisory Board on BNT321. D.H.P. receives grants from BMS, Medannex and Nucana; consulting fees from Servier, AZ, Pfizer, Viatris, Jazz, Ono, and BMS; support for attending meetings and travel from Medannex; participation on a Data Safety Monitoring Board/Advisory Board for Boehringer Ingelheim; receipt for other services from Revolution Medicine, Medannex, and Redx. J.M.H. received a grant by the German Cancer Aid. C.S. has received honoraria for lectures from Roche, support for attending meetings and travel by Servier, and served on Advisory Boards for Astra Zeneca, Bayer, BMS, Incyte, Servier, Taiho and Revolution Medicines. The other authors have no conflicts of interest to declare.
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References
- Bertolo A, Hodul P, Kim DW. ESPAC-4 long-term follow-up: shall we choose gemcitabine and capecitabine as adjuvant therapy for elderly and low-risk pancreatic adenocarcinoma following surgical resection? Ann Pancreat Cancer 2026;9:1.
- Nakasone ES, Coveler AL. Defining risk-adapted adjuvant therapy in resectable pancreatic cancer: an editorial commentary on long-term outcomes from ESPAC4. Ann Pancreat Cancer 2026; Epub ahead of print. [Crossref]
- Whipple AO, Parsons WB, Mullins CR. TREATMENT OF CARCINOMA OF THE AMPULLA OF VATER. Ann Surg 1935;102:763-79. [Crossref] [PubMed]
- Neoptolemos JP, Dunn JA, Stocken DD, et al. Adjuvant chemoradiotherapy and chemotherapy in resectable pancreatic cancer: a randomised controlled trial. Lancet 2001;358:1576-85. [Crossref] [PubMed]
- Neoptolemos JP, Stocken DD, Friess H, et al. A randomized trial of chemoradiotherapy and chemotherapy after resection of pancreatic cancer. N Engl J Med 2004;350:1200-10. [Crossref] [PubMed]
- Oettle H, Post S, Neuhaus P, et al. Adjuvant chemotherapy with gemcitabine vs observation in patients undergoing curative-intent resection of pancreatic cancer: a randomized controlled trial. JAMA 2007;297:267-77. [Crossref] [PubMed]
- Neoptolemos JP, Stocken DD, Tudur Smith C, et al. Adjuvant 5-fluorouracil and folinic acid vs observation for pancreatic cancer: composite data from the ESPAC-1 and -3(v1) trials. Br J Cancer 2009;100:246-50. [Crossref] [PubMed]
- Neoptolemos JP, Stocken DD, Bassi C, et al. Adjuvant chemotherapy with fluorouracil plus folinic acid vs gemcitabine following pancreatic cancer resection: a randomized controlled trial. JAMA 2010;304:1073-81. [Crossref] [PubMed]
- Oettle H, Neuhaus P, Hochhaus A, et al. Adjuvant chemotherapy with gemcitabine and long-term outcomes among patients with resected pancreatic cancer: the CONKO-001 randomized trial. JAMA 2013;310:1473-81. [Crossref] [PubMed]
- Uesaka K, Boku N, Fukutomi A, et al. Adjuvant chemotherapy of S-1 versus gemcitabine for resected pancreatic cancer: a phase 3, open-label, randomised, non-inferiority trial (JASPAC 01). Lancet 2016;388:248-57. [Crossref] [PubMed]
- Neoptolemos JP, Palmer DH, Ghaneh P, et al. Comparison of adjuvant gemcitabine and capecitabine with gemcitabine monotherapy in patients with resected pancreatic cancer (ESPAC-4): a multicentre, open-label, randomised, phase 3 trial. Lancet 2017;389:1011-24. [Crossref] [PubMed]
- Conroy T, Hammel P, Hebbar M, et al. FOLFIRINOX or Gemcitabine as Adjuvant Therapy for Pancreatic Cancer. N Engl J Med 2018;379:2395-406. [Crossref] [PubMed]
- Strobel O, Neoptolemos J, Jäger D, et al. Optimizing the outcomes of pancreatic cancer surgery. Nat Rev Clin Oncol 2019;16:11-26. [Crossref] [PubMed]
- Conroy T, Castan F, Lopez A, et al. Five-Year Outcomes of FOLFIRINOX vs Gemcitabine as Adjuvant Therapy for Pancreatic Cancer: A Randomized Clinical Trial. JAMA Oncol 2022;8:1571-8. [Crossref] [PubMed]
- Neoptolemos JP, Hu K, Bailey P, et al. Personalized Treatment In Localized Pancreatic Cancer. Eur Surg 2024;56:93-109.
- Palmer DH, Jackson R, Springfeld C, et al. Pancreatic Adenocarcinoma: Long-Term Outcomes of Adjuvant Therapy in the ESPAC4 Phase III Trial. J Clin Oncol 2025;43:1240-53. [Crossref] [PubMed]
- Isaji S, Mizuno S, Windsor JA, et al. International consensus on definition and criteria of borderline resectable pancreatic ductal adenocarcinoma 2017. Pancreatology 2018;18:2-11. [Crossref] [PubMed]
- Smeenk HG, van Eijck CH, Hop WC, et al. Long-term survival and metastatic pattern of pancreatic and periampullary cancer after adjuvant chemoradiation or observation: long-term results of EORTC trial 40891. Ann Surg 2007;246:734-40. [Crossref] [PubMed]
- Regine WF, Winter KA, Abrams RA, et al. Fluorouracil vs gemcitabine chemotherapy before and after fluorouracil-based chemoradiation following resection of pancreatic adenocarcinoma: a randomized controlled trial. JAMA 2008;299:1019-26. [Crossref] [PubMed]
- Regine WF, Winter KA, Abrams R, et al. Fluorouracil-based chemoradiation with either gemcitabine or fluorouracil chemotherapy after resection of pancreatic adenocarcinoma: 5-year analysis of the U.S. Intergroup/RTOG 9704 phase III trial. Ann Surg Oncol 2011;18:1319-26. [Crossref] [PubMed]
- Ueno H, Kosuge T, Matsuyama Y, et al. A randomised phase III trial comparing gemcitabine with surgery-only in patients with resected pancreatic cancer: Japanese Study Group of Adjuvant Therapy for Pancreatic Cancer. Br J Cancer 2009;101:908-15. [Crossref] [PubMed]
- Schmidt J, Abel U, Debus J, et al. Open-label, multicenter, randomized phase III trial of adjuvant chemoradiation plus interferon Alfa-2b versus fluorouracil and folinic acid for patients with resected pancreatic adenocarcinoma. J Clin Oncol 2012;30:4077-83. [Crossref] [PubMed]
- Sinn M, Bahra M, Liersch T, et al. CONKO-005: Adjuvant Chemotherapy With Gemcitabine Plus Erlotinib Versus Gemcitabine Alone in Patients After R0 Resection of Pancreatic Cancer: A Multicenter Randomized Phase III Trial. J Clin Oncol 2017;35:3330-7. [Crossref] [PubMed]
- Sinn M, Liersch T, Riess H, et al. CONKO-006: A randomised double-blinded phase IIb-study of additive therapy with gemcitabine + sorafenib/placebo in patients with R1 resection of pancreatic cancer - Final results. Eur J Cancer 2020;138:172-81. [Crossref] [PubMed]
- Abrams RA, Winter KA, Safran H, et al. Results of the NRG Oncology/RTOG 0848 Adjuvant Chemotherapy Question Erlotinib + Gemcitabine for Resected Cancer of the Pancreatic Head: A Phase II Randomized Clinical Trial. Am J Clin Oncol 2020;43:173-9. [Crossref] [PubMed]
- Abrams RA, Winter KA, Goodman KA, et al. NRG Oncology/RTOG 0848: Results after adjuvant chemotherapy +/- chemoradiation for patients with resected periampullary pancreatic adenocarcinoma (PA). J Clin Oncol 2024;42:4005.
- Tempero MA, Pelzer U, O'Reilly EM, et al. Adjuvant nab-Paclitaxel + Gemcitabine in Resected Pancreatic Ductal Adenocarcinoma: Results From a Randomized, Open-Label, Phase III Trial. J Clin Oncol 2023;41:2007-19. [Crossref] [PubMed]
- Conroy T, Pfeiffer P, Vilgrain V, et al. Pancreatic cancer: ESMO Clinical Practice Guideline for diagnosis, treatment and follow-up. Ann Oncol 2023;34:987-1002. [Crossref] [PubMed]
- Tempero MA, Malafa MP, Benson AB, et al. NCCN Clinical Practice Guidelines in Oncology (NCCN Guidelines®). Version 3.2024, 08/02/2024 © 2024 National Comprehensive Cancer Network® (NCCN®), NCCN.org. Available online: https:// www.nccn.org/professionals/physician_gls/pdf/pancreatic.pdf
- Reni M, Balzano G, Zanon S, et al. Safety and efficacy of preoperative or postoperative chemotherapy for resectable pancreatic adenocarcinoma (PACT-15): a randomised, open-label, phase 2-3 trial. Lancet Gastroenterol Hepatol 2018;3:413-23. [Crossref] [PubMed]
- Versteijne E, Suker M, Groothuis K, et al. Preoperative Chemoradiotherapy Versus Immediate Surgery for Resectable and Borderline Resectable Pancreatic Cancer: Results of the Dutch Randomized Phase III PREOPANC Trial. J Clin Oncol 2020;38:1763-73. [Crossref] [PubMed]
- Versteijne E, van Dam JL, Suker M, et al. Neoadjuvant Chemoradiotherapy Versus Upfront Surgery for Resectable and Borderline Resectable Pancreatic Cancer: Long-Term Results of the Dutch Randomized PREOPANC Trial. J Clin Oncol 2022;40:1220-30. [Crossref] [PubMed]
- Sohal DPS, Duong M, Ahmad SA, et al. Efficacy of Perioperative Chemotherapy for Resectable Pancreatic Adenocarcinoma: A Phase 2 Randomized Clinical Trial. JAMA Oncol 2021;7:421-7. [Crossref] [PubMed]
- Seufferlein T, Uhl W, Kornmann M, et al. vgb or only adjuvant gemcitabine plus nab-paclitaxel for resectable pancreatic cancer (NEONAX)-a randomized phase II trial of the AIO pancreatic cancer group. Ann Oncol 2023;34:91-100. [Crossref] [PubMed]
- Schwarz L, Bachet JB, Meurisse A, et al. Neoadjuvant FOLF(IRIN)OX Chemotherapy for Resectable Pancreatic Adenocarcinoma: Multicenter Randomized Noncomparative Phase II Trial (PANACHE01 FRENCH08 PRODIGE48 study). J Clin Oncol 2025;43:1984-96. [Crossref] [PubMed]
- Labori KJ, Bratlie SO, Andersson B, et al. Neoadjuvant FOLFIRINOX versus upfront surgery for resectable pancreatic head cancer (NORPACT-1): a multicentre, randomised, phase 2 trial. Lancet Gastroenterol Hepatol 2024;9:205-17. [Crossref] [PubMed]
- Janssen QP, van Dam JL, van Bekkum ML, et al. Neoadjuvant FOLFIRINOX versus neoadjuvant gemcitabine-based chemoradiotherapy in resectable and borderline resectable pancreatic cancer (PREOPANC-2): a multicentre, open-label, phase 3 randomised trial. Lancet Oncol 2025;26:1346-56. [Crossref] [PubMed]
- Goetze TO, Reichart A, Bankstahl US, et al. Adjuvant Gemcitabine Versus Neoadjuvant/Adjuvant FOLFIRINOX in Resectable Pancreatic Cancer: The Randomized Multicenter Phase II NEPAFOX Trial. Ann Surg Oncol 2024;31:4073-83. [Crossref] [PubMed]
- Unno M, Motoi F, Matsuyama Y, et al. Neoadjuvant Chemotherapy With Gemcitabine and S-1 Versus Upfront Surgery for Resectable Pancreatic Cancer: Results of the Randomized Phase II/III Prep-02/JSAP05 Trial. Ann Surg 2026;283:57-64. [Crossref] [PubMed]
- Bai X, Li X, Chen Y, et al. Neoadjuvant nab-paclitaxel plus gemcitabine followed by modified FOLFIRINOX for resectable pancreatic cancer: A randomized phase 3 trial. Cancer Cell 2025;43:2259-2267.e2. [Crossref] [PubMed]
- Jang JY, Han Y, Lee H, et al. Oncological Benefits of Neoadjuvant Chemoradiation With Gemcitabine Versus Upfront Surgery in Patients With Borderline Resectable Pancreatic Cancer: A Prospective, Randomized, Open-label, Multicenter Phase 2/3 Trial. Ann Surg 2018;268:215-22. [Crossref] [PubMed]
- Ghaneh P, Palmer D, Cicconi S, et al. Immediate surgery compared with short-course neoadjuvant gemcitabine plus capecitabine, FOLFIRINOX, or chemoradiotherapy in patients with borderline resectable pancreatic cancer (ESPAC5): a four-arm, multicentre, randomised, phase 2 trial. Lancet Gastroenterol Hepatol 2023;8:157-68. [Crossref] [PubMed]
- Yamaguchi J, Yokoyama Y, Fujii T, et al. Results of a Phase II Study on the Use of Neoadjuvant Chemotherapy (FOLFIRINOX or GEM/nab-PTX) for Borderline-resectable Pancreatic Cancer (NUPAT-01). Ann Surg 2022;275:1043-9. [Crossref] [PubMed]
- Katz MHG, Shi Q, Meyers J, et al. Efficacy of Preoperative mFOLFIRINOX vs mFOLFIRINOX Plus Hypofractionated Radiotherapy for Borderline Resectable Adenocarcinoma of the Pancreas: The A021501 Phase 2 Randomized Clinical Trial. JAMA Oncol 2022;8:1263-70. [Crossref] [PubMed]
- Notta F, Chan-Seng-Yue M, Lemire M, et al. A renewed model of pancreatic cancer evolution based on genomic rearrangement patterns. Nature 2016;538:378-82. [Crossref] [PubMed]
- Chan-Seng-Yue M, Kim JC, Wilson GW, et al. Transcription phenotypes of pancreatic cancer are driven by genomic events during tumor evolution. Nat Genet 2020;52:231-40. [Crossref] [PubMed]
- Grünwald BT, Devisme A, Andrieux G, et al. Spatially confined sub-tumor microenvironments in pancreatic cancer. Cell 2021;184:5577-5592.e18. [Crossref] [PubMed]
- Hwang WL, Jagadeesh KA, Guo JA, et al. Single-nucleus and spatial transcriptome profiling of pancreatic cancer identifies multicellular dynamics associated with neoadjuvant treatment. Nat Genet 2022;54:1178-91. [Crossref] [PubMed]
- Zhou X, An J, Kurilov R, et al. Persister cell phenotypes contribute to poor patient outcomes after neoadjuvant chemotherapy in PDAC. Nat Cancer 2023;4:1362-81. [Crossref] [PubMed]
- Springfeld C, Ferrone CR, Katz MHG, et al. Neoadjuvant therapy for pancreatic cancer. Nat Rev Clin Oncol 2023;20:318-37. [Crossref] [PubMed]
- Reni M, Macchini M, Orsi G, et al. Preoperative mFOLFIRINOX versus PAXG for stage I-III resectable and borderline resectable pancreatic ductal adenocarcinoma (PACT-21 CASSANDRA): results of the first randomisation analysis of a randomised, open-label, 2 × 2 factorial phase 3 trial. Lancet 2026;406:2945-56. [Crossref] [PubMed]
- Knox JJ, Jang GH, Grant RC, et al. Whole genome and transcriptome profiling in advanced pancreatic cancer patients on the COMPASS trial. Nat Commun 2025;16:5919. [Crossref] [PubMed]
- McLaughlin RM, Jonker DJ, Karanicolas PJ, et al. NeoPancONE: GATA6 expression as a predictor of benefit to peri-operative modified FOLFIRINOX in resectable pancreatic adenocarcinoma (r-PDAC): A multicentre phase II study. J Clin Oncol 2025;4011.
- Hu ZI, O'Reilly EM. Therapeutic developments in pancreatic cancer. Nat Rev Gastroenterol Hepatol 2024;21:7-24. [Crossref] [PubMed]
- Garralda E, Beaulieu ME, Moreno V, et al. MYC targeting by OMO-103 in solid tumors: a phase 1 trial. Nat Med 2024;30:762-71. [Crossref] [PubMed]
- Rodon J, Prenen H, Sacher A, et al. First-in-human study ofa AMG 193, an MTA-cooperative PRMT5 inhibitor, in patients with MTAP-deleted solid tumors: results from phase I dose exploration. Ann Oncol 2024;35:1138-47. [Crossref] [PubMed]
- Sethna Z, Guasp P, Reiche C, et al. RNA neoantigen vaccines prime long-lived CD8(+) T cells in pancreatic cancer. Nature 2025;639:1042-51. [Crossref] [PubMed]
- Gyawali B, Booth CM. Treatment of metastatic pancreatic cancer: 25 years of innovation with little progress for patients. Lancet Oncol 2024;25:167-70. [Crossref] [PubMed]
- Gyawali B, Eisenhauer EA, van der Graaf W, et al. Common Sense Oncology principles for the design, analysis, and reporting of phase 3 randomised clinical trials. Lancet Oncol 2025;26:e80-9. [Crossref] [PubMed]
- Springfeld C, Hackert T, Palmer DH, et al. New implications from long-term outcomes of perioperative therapy in resectable pancreatic cancer. Br J Cancer 2025; Epub ahead of print. [Crossref]
Cite this article as: Neoptolemos JP, Springfeld C, Hackert T, Palmer DH, Öhlund D, Peccerella T, Harnoss JM, Hank T, Ladisa F, Michalski CW. Improving long-term outcomes in resectable pancreatic cancer. Ann Pancreat Cancer 2026;9:6.

