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Koea, Jonathan

0000-0001-8833-5603

Mayo Clinic

North Shore Hospital

Citations 2

Contemporary Adjuvant Chemotherapy for Intraductal Papillary Mucinous Neoplasms
Haugk, Beate , White, Steven, Marchegiani, Giovanni, Holmberg, Marcus, Zerbi, Alessandro, Lu, Zipeng , Inoue, Y., Choi, Munseok , Kang, Chang Moo, Visser, B., Corpelijn, Lieke, Andersson, Bodil, Bereza-Carlson, Paulina, Björnsson, Bergthor, Wennerblom, Johanna, Goh, Brian K. P., Hartman, V., Ahmad, Syed, Patel, Sameer, Berrevoet, Frederik, Mortensen, Kim Erlend, Roberts, K., Lynch, Calum, Gupta, Amit, Kleeff, Joerg, Addeo, Pietro, Friess, Helmut, Koea, Jonathan, Gomez, Dhanny , Gordon-Weeks, Alex, Doria, Cataldo, Tzimas, Georgios, Franklin, O., Månsson, C., Cabús, Santiago Sánchez, Bhogal, Ricky H. , Pathak, Samir, Honselmann, Kim Christin, Balakrishnan, Anita, Mann, Kulbir , Gill, Anthony J., Mittal, A, Samra, Jas, Athwal, Tejinderjit, Loveday, Benjamin, Bhardwaj, Neil, Menon, Krishna, Thapa, Prabin, Matsumoto, Ippei, Jamieson, Nigel, Rebours, Vinciane, Descourvières, Clémence, Davidson, BR, Soreide, Kjetil, Pandanaboyana, Sanjay, Collaborative, Adeno-IPMN2, Kumar, Ajit, González, Carol Natalia Clavijo, Lam, Shi, L’Official-German, Ivan, Bergner, Tina, Rosso, Edoardo , Giulianotti, Pier Cristoforo , Morreau, Mathew , Dili, Alexandra, Sotiropoulou, Maria , Kuzman, Matta , Büyükkasap, Ahmet Çağrı, Uludağ, Gökhan, McGuigan, Mari-Claire , Chouari, Tarak , Dogul, Ahmet, Doğu, Doğukan , Rebelo, Artur, Holewik, Franziska Bernadette, Plesa-Furda, Roxana, Revoredo, Fernando, Galanis, Ilias , Maharjan, Dhiresh, Ghorbani, Poya , Lind, Max, Ami, Katsuya , Vijayashanker, Aarathi , Alsaoudi, Tareq , Lundgren, Linda , Ellisa, Katrina, Hong, Paul , Gupta, Archit, MartinXu, Congde, Konstantoudakis, Georgios, Christophides, Thalis, Spurring, Eleanor Margaret, Iwao, Yasuhito, Pirklc, Martin, Vaitha, Ruhi , Tiwari, Navneet, Sheel, Andrea, Kotecha, Krishna , Stavrou, Gregor A., Patel, Rikhilroy, Misca, Mihaela , Hammond, John, Roalso, Marcus Thomas Thor, Soomro, Faiza H, Halimi, Asif , Kendall, Timothy, Patel, Visad, Stankic, Dunja, Dries, Pieter , Hein, Charlotte, Betram, Julia, Jacob, Rosetta, Wilson, Gregory, Redas, Souheil, Poškus, Augustas, Mosert, Paula Lucia, Šilinskaitė, Ugnė , Hirose, Yuki, Liu, Xue, Standaert, Lars, Kay, Tegan J, Nishida, Kenji, Peddakota, Vivek , Gupta, Amit , Kang, Chang Moo , Ven Fong, Zhi, Kang, Chang Moo , Lucocq, James E. , Marchegiani, Giovanni , Zerbi, Alessandro , Pagnanelli, Michele , Visser, B. , Andersson, Bodil , Bereza‐Carlson, Paulina , Björnsson, Bergþór , Wennerblom, Johanna Hansson , Labori, Knut Jørgen , Goh, Brian K P , Hartman, Vera , Berrevoet, Frederik Christiaan , Ausania, Fabio , Bertrand, Claude , Kleeff, Joerg, Addeo, Pietro , Bellotti, Ruben , Fong, Zhi Ven , Friess, Helmut , Koea, Jonathan , Gordon-Weeks, Alex Nicolas , Doria, Cataldo , Franklin, Oskar , Pathak, Samir , Honselmann, Kim C. , Balakrishnan, Anita , Harrison, Ewen M. , Gill, A J, Mittal, Anubhav, Samra, Jas , Athwal, Tejinderjit , Loveday, Benjamin P. T. , Teh, Catherine , Bhardwaj, Neil , Menon, Krishna, Matsumoto, Ippei , Jamieson, Nigel , Rebours, Vinciane , Søreide, Kjetil , Martlı, Hüseyin Fahri , Roeyen, Geert , Antonakis, Pantelis T. , Bramis, Konstantinos , Hall, Lewis A , Valle, Valentina , Connor, Saxon J. , Kapiris, Stylianos A. , Kerem, Mustafa , Rebelo, Artur , Plesa-Furda, R., Filho, Omero Pereira da Costa , Galanis, Ilias, Konstantoudakis, Georgios, Christophides, Thalis, McGuinness, Matthew James , Yaqub, Sheraz , Pellegrini, Riccardo , Perri, Giampaolo , Sheel, Andrea , Sheen, Amy , Evans, Daisy, Ghamarnejad, Omid , Karavias, Dimitrios D. , Roalsø, Marcus T. T. , Stankic, Dunja , Grubor, Nikica , Gulla, Aistė , Furukawa, Takaaki , Hirose, Yuki , Yin, Lingdi

JAMA Network Open | March 27, 2026 | Volume: 9 | Issue: 3 | Pages: e263688

10.1001/jamanetworkopen.2026.3688 Get It

Importance Adjuvant chemotherapy regimens may be administered after pancreatic resection for adenocarcinoma arising from intraductal papillary mucinous neoplasms (A-IPMNs), although the evidence supporting their use is limited. Objective To evaluate the survival benefit associated with contemporary adjuvant chemotherapy regimens after resection in A-IPMNs between 2017 and 2023. Design, Setting, and Participants This retrospective cohort study was an international, multicenter study with 69 participating centers across Europe, North America, South America, and the Asia-Pacific region. Patients undergoing resection for A-IPMNs were included. Data were analyzed from May to August 2025. Intervention Contemporary adjuvant chemotherapy regimens, such as gemcitabine-capecitabine (GemCap); 5-fluorouracil, leucovorin, oxaliplatin, and irinotecan (FOLFIRINOX), modified FOLFIRINOX (mFOLFIRINOX), and S-1. Main Outcome and Measure Overall survival (months). Results Among 1321 patients (median [IQR] age 70 [63 to 76] years; 713 males [54.0%] and 608 females [46.0%]), 781 patients (59.1%) received adjuvant chemotherapy, while in 181 patients (13.7%) it was omitted due to poor patient fitness. Of patients who received adjuvant chemotherapy, 568 patients (72.6%) received contemporary regimens, including GemCap (232 patients [29.7%]), FOLFIRINOX (176 patients [22.5%]), mFOLFIRINOX (71 patients [9.1%]), and S-1 (70 patients [9.0%]). The median (IQR) follow-up for the cohort was 64.2 (40.4 to 85.0) months, and the median overall survival was 73.8 months (95% CI, 66.4 to 81.9 months). After 90-day landmark analysis and exclusion of patients ineligible for chemotherapy, adjuvant chemotherapy vs no adjuvant chemotherapy (propensity score–matched populations, 243:243 patients) was not associated with improved overall survival (median, 82.3 months; 95% CI, 78.2 months to not applicable [NA] vs not reached; 95% CI, 75.3 months to NA; P = .58). Contemporary regimens vs no adjuvant chemotherapy (propensity score–matched populations, 309:309 patients) was not associated with longer survival, and a mean survival benefit greater than 4.2 months over 5 years was excluded (difference in restricted mean survival, 1.26 months; 95%, −1.72 to 4.24 months). Treatment outcomes did not vary by chemotherapy regimen or disease characteristic (eg, N stage or carbohydrate antigen 19-9 level). Conclusions and Relevance In this study, contemporary adjuvant chemotherapy was not associated with improved overall survival in A-IPMNs, and a randomized clinical trial is indicated.
Inequities in ‘failure to rescue’ for Indigenous Māori after gastrointestinal cancer surgery in New Zealand
Wells, Cameron I. , Wehipeihana, Emma, Varghese, Chris , Paterson, Luke , O’Grady, Gregory , Harmston, Christopher , Bissett, Ian , O'Grady, Gregory , Gurney, Jason , Bissett, Ian , Varghese, Chris , Wells, Cameron , Koea, Jonathan

British Journal of Surgery | July 14, 2025 | Volume: 112 | Issue: 8 | Pages: No page available

10.1093/bjs/znaf161 Get It

Abstract Background Indigenous populations worldwide experience unjust inequities in surgical outcomes. In Aotearoa New Zealand, Indigenous Māori experience poorer health outcomes, including higher rates of postoperative mortality. The aim of this study was to quantify ethnic disparities in ‘failure to rescue’ (FTR), complications, and mortality following gastrointestinal cancer surgery and to analyse trends over time. Methods A retrospective national population-based cohort study of patients undergoing resection for gastrointestinal and hepatopancreatobiliary cancers from 2005 to 2020 was conducted. Self-reported ethnicity data were collected at the time of surgery. The primary outcome was FTR, defined as mortality following a complication within 90 days of surgery. Results In total, 31 185 patients were included; 2479 (7.9%) were Māori, 46.5% were female, and the median age was 71 (interquartile range 62–78) years. Māori patients were younger and had higher levels of socio-economic deprivation and co-morbidity. Māori had higher age-standardized rates of mortality (5.9% versus 3.2%), complications (52.9% versus 42.4%), and FTR (10.8% versus 7.2%), compared with European/Other. Multivariable regression demonstrated higher odds of mortality (adjusted OR (aOR) 1.45 (95% c.i. 1.15–1.82)), complications (aOR 1.30 (95% c.i. 1.17–1.45)), and FTR (aOR 1.29 (95% c.i. 1.01–1.62)) for Māori. Analysis over time showed a significant improvement in risk-adjusted rates of mortality (6.2% in 2005–2008 versus 3.4% in 2017–2020) and FTR (7.3% in 2005–2008 versus 4.0% in 2017–2020) for European/Other, but no change for Māori (rates of mortality were 6.6% in 2005–2008 versus 5.4% in 2017–2020 and rates of FTR were 7.8% in 2005–2008 versus 6.3% in 2017–2020). Conclusion Widening inequities in FTR have worsened disparities in postoperative mortality for Māori patients. ‘Complication rescue’ is a target to reduce inequities and improve perioperative care for Māori patients.