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Institutt for klinisk medisin krl023@post.uit.no Tromsø

Lassen, Kristoffer


Professor II

Stillingsbeskrivelse

Tilknyttet forskningsgruppe Gastrokirurgi.


  • Mushegh Sahakyan, Davit Aghayan, Bjørn von Gohren Edwin, Ruslan Alikhanov, Natalia Britskaia, Kristoffer Watten Brudvik m.fl.:
    Laparoscopic versus open liver resection for intrahepatic cholangiocarcinoma: a multicenter propensity score-matched study
    Scandinavian Journal of Gastroenterology 2022 ARKIV / DOI
  • Sheraz Yaqub, Bjørn Atle Bjørnbeth, Jon-Helge Angelsen, Claus W. Fristrup, Jon Erik Grønbech, Oskar Hemmingsson m.fl.:
    Aspirin as secondary prevention in colorectal cancer liver metastasis (ASAC trial): study protocol for a multicentre randomized placebo-controlled trial
    Trials 2021 ARKIV / DOI
  • Knut Jørgen Labori, Tore Tholfsen, Sheraz Yaqub, Kristoffer Lassen, Dyre Kleive, Anne Waage :
    Gastro- or Duodenojejunostomy Leaks After Pancreatoduodenectomy: Single Center Experience and Narrative Literature Review
    Journal of Gastrointestinal Surgery 2021 ARKIV / DOI
  • Mushegh A. Sahakyan, Caroline S. Verbeke, Tore Tholfsen, Dejan Ignjatovic, Dyre Kleive, Trond Buanes m.fl.:
    Prognostic Impact of Resection Margin Status in Distal Pancreatectomy for Ductal Adenocarcinoma
    Annals of Surgical Oncology 2021 ARKIV / DOI
  • Kushtrim Kryeziu, Seyed Hossein Moosavi, Christian Holst Bergsland, Marianne Guren, Peter Andreas Wold Eide, Max Totland m.fl.:
    Increased sensitivity to SMAC mimetic LCL161 identified by longitudinal ex vivo pharmacogenomics of recurrent, KRAS mutated rectal cancer liver metastases
    Journal of Translational Medicine 2021 ARKIV / DOI
  • Davit Aghayan, Airazat Kazaryan, Åsmund Avdem Fretland, Bård Ingvald Røsok, Leonid Barkhatov, Kristoffer Lassen m.fl.:
    Evolution of laparoscopic liver surgery: 20-year experience of a Norwegian high-volume referral center
    Surgical Endoscopy 2021 ARKIV / DOI
  • Linn Såve Nymo, Dyre Kleive, Kim Waardal, Erling Audun Bringeland, Jon Arne Søreide, Knut Jørgen Labori m.fl.:
    Centralizing a national pancreatoduodenectomy service: striking the right balance
    BJS Open 2020 ARKIV / DOI
  • Emmanuel Melloul, Kristoffer Lassen, Didier Roulin, Fabian Grass, Julie Perinel, Mustapha Adham m.fl.:
    Guidelines for perioperative care for pancreatoduodenectomy: Enhanced Recovery After Surgery (ERAS) recommendations 2019
    World Journal of Surgery 2020 DOI
  • Eli Skeie, Randi Julie Tangvik, Linn Såve Nymo, Stig Harthug, Kristoffer Lassen, Asgaut Viste :
    Weight loss and BMI criteria in GLIM's definition of malnutrition is associated with postoperative complications following abdominal resections – Results from a National Quality Registry
    Clinical Nutrition 2019 ARKIV / DOI
  • Dyre Kleive, Mushegh Sahakyan, Knut Jørgen Labori, Kristoffer Lassen :
    Nasogastric Tube on Demand is Rarely Necessary After Pancreatoduodenectomy Within an Enhanced Recovery Pathway
    World Journal of Surgery 2019 ARKIV / DOI
  • Kjetil Søreide, Linn Såve Nymo, Dyre Kleive, Frank Olsen, Kristoffer Lassen :
    Variation in use of open and laparoscopic distal pancreatectomy and associated outcome metrics in a universal health care system
    Pancreatology (Print) 2019 ARKIV / DOI
  • Kristoffer Watten Brudvik, Sheraz Yaqub, E Kemsley, MME Coolsen, CHC Dejong, SJ Wigmore m.fl.:
    Survey of the attitudes of hepatopancreaticobiliary surgeons in northern Europe to resection of choledohal cysts in asymptomatic Western adults
    BJS Open 2019 DOI
  • Linn Såve Nymo, Lars Aabakken, Kristoffer Lassen :
    Priority and prejudice: does low socioeconomic status bias waiting time for endoscopy? A blinded,randomized survey
    Scandinavian Journal of Gastroenterology 2018 DOI
  • Kristoffer Lassen, Linn Såve Nymo, Frank Olsen, Kristoffer Watten Brudvik, Åsmund Avdem Fretland, Kjetil Søreide :
    Contemporary practice and short-term outcomes after liver resections in a complete national cohort
    Langenbeck's Archives of Surgery 2018 DOI
  • Linn Såve Nymo, Stig Norderval, Morten Tandberg Eriksen, Hans Wasmuth, Hartwig Kørner, Bjørn Atle Bjørnbeth m.fl.:
    Short-term outcomes after elective colon cancer surgery: an observational study from the Norwegian registry for gastrointestinal and HPB surgery, NoRGast
    Surgical Endoscopy 2018 ARKIV / DOI
  • Kjetil Søreide, Frank Olsen, Linn Såve Nymo, Dyre Kleive, Kristoffer Lassen :
    A nationwide cohort study of resection rates and short-term outcomes in open and laparoscopic distal pancreatectomy
    HPB 2018 DOI
  • Kristoffer Lassen, Linn Såve Nymo, Hartwig Kørner, Kevin Otto Thon, Torkil Grindstein, Hans Wasmuth m.fl.:
    The New National Registry for Gastrointestinal Surgery in Norway: NoRGast
    Scandinavian Journal of Surgery 2018 ARKIV / DOI
  • Linn Såve Nymo, Kjetil Søreide, Dyre Kleive, Frank Olsen, Kristoffer Lassen :
    The effect of centralization on short term outcomes of pancreatoduodenectomy in a universal health care system
    HPB 2018 DOI
  • Kristoffer Lassen, Linn Såve Nymo, Frank Olsen, Kjetil Søreide :
    Benchmarking of aggregated length of stay after open and laparoscopic surgery for cancers of the digestive system
    BJS Open 2018 ARKIV / DOI
  • Knut Jørgen Labori, Kristoffer Lassen, Dag Hoem, Jon Erik Grønbech, Jon Arne Søreide, Kim Erlend Mortensen m.fl.:
    Neoadjuvant chemotherapy versus surgery first for resectable pancreatic cancer (Norwegian Pancreatic Cancer Trial - 1 (NorPACT-1)) – study protocol for a national multicentre randomized controlled trial
    BMC Surgery 2017 ARKIV / DOI
  • Anneli Giske, Linn Såve Nymo, Ole-Martin Fuskevåg, Siri Amundsen, Gunnar Skov Simonsen, Kristoffer Lassen :
    Systemic antibiotic prophylaxis prior to gastrointestinal surgery – is oral administration of doxycycline and metronidazole adequate?
    Infectious Diseases 2017 DOI
  • Eirik Kjus Aahlin, Frank Olsen, Bård Uleberg, Bjarne K. Jacobsen, Kristoffer Lassen :
    Major postoperative complications are associated with impaired long-term survival after gastro-esophageal and pancreatic cancer surgery: a complete national cohort study
    BMC Surgery 2016 ARKIV / DOI
  • Eirik Kjus Aahlin, Gerd Tranø, N Johns, Arild Horn, Jon Arne Søreide, KC Fearon m.fl.:
    Health-related quality of life, cachexia and overall survival after major upper abdominal surgery: A prospective cohort study
    Scandinavian Journal of Surgery 2016 DOI
  • Andrew Currie, Jennifer Burch, John T. Jenkins, Omar Faiz, Robin H. Kennedy, Olle Ljungqvist m.fl.:
    The impact of enhanced recovery protocol compliance on elective colorectal cancer resection: Results from an international registry
    Annals of Surgery 2015 DOI
  • Michael Hughes, Mariëlle M.E. Coolsen, Eirik Kjus Aahlin, Ewen M Harrison, Stephen J McNally, C. H. C Dejong m.fl.:
    Attitudes of patients and care providers to enhanced recovery after surgery programs after major abdominal surgery
    Journal of Surgical Research 2015 DOI
  • Eirik Kjus Aahlin, Gerd Tranø, Neil Johns, Arild Horn, Jon Arne Søreide, Kenneth Christopher H. Fearon m.fl.:
    Risk factors, complications and survival after upper abdominal surgery: A prospective cohort study
    BMC Surgery 2015 ARKIV / DOI
  • Kim Erlend Mortensen, Magnus Frohm Nilsson, Karem Slim, Markus Schäfer, Christophe Mariette, Marco Braga m.fl.:
    Consensus guidelines for enhanced recovery after gastrectomy: Enhanced Recovery after Surgery (ERAS®) Society recommendations
    British Journal of Surgery 2014 DOI
  • Eirik Kjus Aahlin, Maarten von Meyenfeldt, Cornelis H.C. Dejong, Olle Ljungqvist, Kenneth C. Fearon, Dileep N Lobo m.fl.:
    Functional recovery is considered the most important target: a survey of dedicated professionals
    Perioperative Medicine 2014 FULLTEKST / ARKIV / DOI
  • Yannick Cerantola, Massimo Valerio, Beata Persson, Patrice Jichlinski, Olle Ljungqvist, Martin Hubner m.fl.:
    Guidelines for perioperative care after radical cystectomy for bladder cancer: Enhanced Recovery After Surgery (ERAS®) society recommendations
    Clinical Nutrition 2013 DOI
  • Kenneth C. Fearon, John T. Jenkins, Francesco Carli, Kristoffer Lassen :
    Patient optimization for gastrointestinal cancer surgery
    British Journal of Surgery 2013 DOI
  • Mariëlle M.E. Coolsen, Ronald M. van Dam, Aart A. van der Wilt, Karem Slim, Kristoffer Lassen, Cornelis H.C. Dejong :
    Systematic Review and Meta-analysis of Enhanced Recovery After Pancreatic Surgery with Particular Emphasis on Pancreaticoduodenectomies
    World Journal of Surgery 2013 DOI
  • Mariëlle M.E. Coolsen, Edgar M. Wong-Lun-Hing, Ronald M. van Dam, Aart A. van der Wilt, Karem Slim, Kristoffer Lassen m.fl.:
    A systematic review of outcomes in patients undergoing liver surgery in an enhanced recovery after surgery pathways
    HPB 2013 DOI
  • Kristoffer Lassen, Mariëlle M.E. Coolsen, Karem Slim, Francesco Carli, Jose de Aguilar-Nascimento, Markus Schäfer m.fl.:
    Guidelines for Perioperative Care for Pancreaticoduodenectomy: Enhanced Recovery After Surgery (ERAS((R))) Society Recommendations
    World Journal of Surgery 2013 DOI
  • Nichola Robertson, Peter James Gallacher, Nathalie Peel, James Garden, Mark Duxbury, Kristoffer Lassen m.fl.:
    Implementation of an enhanced recovery programme following pancreaticoduodenectomy
    HPB 2012 DOI
  • Kristoffer Lassen, MME Coolsen, Karem Slim, Francesco Carli, Jose de Aguilar-Nascimento, Markus Schäfer m.fl.:
    Guidelines for perioperative care for pancreaticoduodenectomy: Enhanced Recovery After Surgery (ERAS (R)) Society recommendations
    Clinical Nutrition 2012 DOI
  • Kristoffer Lassen, Anne Høye, Truls Myrmel :
    Randomised Trials in Surgery: The Burden of Evidence
    Reviews on recent clinical trials 2012 DOI
  • Ingvild Nygård, Kristoffer Lassen, Jørn Kjæve, Arthur Revhaug :
    Mortality and Survival Rates after Elective Hepatic Surgery in a Low-Volume Centre Are Comparable to Those of High-Volume Centres
    ISRN surgery 2012 DOI
  • Ronald M. van Dam, Edgar M. Wong-Lun-Hing, Gerard JP Van Breukelen, Jan HMB Stoot, Joost R. van der Vorst, Marc H.A. Bemelmans m.fl.:
    Open versus laparoscopic left lateral hepatic sectionectomy within an enhanced recovery ERAS (R) programme (ORANGE II - Trial): study protocol for a randomised controlled trial
    Trials 2012 DOI
  • Hanne Hamre, Kristoffer Lassen :
    Bedre oversikt over pankreaskreft i Norge
    Tidsskrift for Den norske legeforening 2021 DOI
  • Kristoffer Lassen :
    The tube, the pancreatoduodenectomy-and the dogma
    BJS Open 2021 DOI
  • Marcus Holmberg, Hanna Koppatz, Anders Jansson, Jens Georg Hillingsø, Peter Noergaard Larsen, Kristoffer Lassen m.fl.:
    Secondary effects of the COVID-19 pandemic on surgical management of hepatopancreatobiliary malignancies in the Nordic capitals
    British Journal of Surgery 2021 DOI
  • Kristin Hammersbøen Bjørlykke, Lars Lohne Eftang, Krzysztof Grzyb, Pål Dag Line, Kristoffer Lassen, Jørgen Jahnsen :
    A man in his fifties with abdominal pain, itching and weight loss
    Tidsskrift for Den norske legeforening 2020 DOI
  • Kjetil Søreide, Linn Såve Nymo, Kristoffer Lassen :
    Centralization of Pancreatic Surgery in Europe: an Update
    Journal of Gastrointestinal Surgery 2019 DOI
  • Kristoffer Lassen :
    Drain after Pancreatoduodenectomy: Methodological Issues
    Annals of Surgery 2018 DOI
  • Kristoffer Lassen, Bjørn Atle Bjørnbeth, Pål Dag Line, Andreas Abildgaard, Jon Arne Søreide, Kim Erlend Mortensen m.fl.:
    Trump's ban on colleagues from Islamic countries
    The Lancet 2017 DOI
  • Kristoffer Lassen, Cornelis H.C. Dejong, Arthur Revhaug, Ken Fearon, Dileep N. Lobo, Olle Ljungqvist :
    Food at will after pancreaticoduodenectomies. Re. "Perioperative nutritional support of patients undergoing pancreatic surgery in the age of ERAS"
    Nutrition - The International Journal of Applied and Basic Nutritional Sciences 2015 DOI
  • Jon Arne Søreide, Jon Erik Grønbech, Kristoffer Lassen, Svein Dueland, Rune Smaaland, Ivar Prydz Gladhaug m.fl.:
    Nasjonalt handlingsprogram med retningslinjer for diagnostikk, behandling og oppfølging av pasienter med pancreaskreft
    2014 FULLTEKST
  • Kristoffer Lassen, Kim Erlend Mortensen, Elizabeth P. Griffiths, Samir Johna, Magnus Nilsson :
    Huge effect of arginine on survival in gastric cancer?
    Journal of Cancer Research and Clinical Oncology 2014 DOI
  • Hitendra R.H. Patel, Yannick Cerantola, Massimo Valerio, Beata Persson, Patrice Jichlinski, Olle Ljungqvist m.fl.:
    Enhanced recovery after surgery: are we ready, and can we afford not to implement these pathways for patients undergoing radical cystectomy?
    European Urology 2014 SAMMENDRAG / DOI
  • Kristoffer Lassen, O Ljungqvist :
    Pancreaticoduodenectomy: ERAS recommendations
    Clinical Nutrition 2013 DOI

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