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Prof. Dr. med. Otto Kollmar

Chefarzt Stv. Viszeralchirurgie
Leiter Hepatobiliäre Chirurgie
Standort Universitätsspital



seit 2020
Titularprofessor an der Medizinischen Fakultät der Universität Basel (gleichzeitig Umhabilitation)

seit 2020    
Chefarzt Stv. Viszeralchirurgie und standortübergreifender Stellvertreter von Prof. Dr. med. Markus von Flüe
Leitung der Hepatobiliären Chirurgie

seit 2020
Mitglied des Ethik-Beirats des Universitätsspitals Basel 

seit 2019    
Leitender Arzt, Universitäres Bauchzentrum Basel – Clarunis; Leitung der Hepatobiliären Chirurgie

Interimistischer Chefarzt der Klinik für Allgemein-, Viszeral- und Gefäßchirurgie, Leitung der Gesamtchirurgie, Klinik Rothenburg o.d.T., ANregiomed

Direktor der Klinik für Allgemein- und Viszeralchirurgie
HELIOS Dr. Horst Schmidt Kliniken Wiesbaden

W2-Professur (ltd. OA)
Klinik für Allgemein-, Viszeral- und Kinderchirurgie; Universitätsmedizin Göttingen (UMG, Direktor: Prof. Dr. M.B. Ghadimi)

Leitender Oberarzt und Vertreter des Klinikdirektors
UMG Göttingen

Geschäftsführender Oberarzt
Klinik für Allgemeine Chirurgie, Viszeral-, Gefäß- und Kinderchirurgie; Universität des Saarlandes (UKS) Homburg/Saar

APL-Professor; Medizinischen Fakultät, UKS Homburg/Saar

Lehrbeauftragter, UKS Homburg/Saar

Facharzt für Viszeralchirurgie und Facharzt für Spezielle Viszeralchirurgie

Habilitation für das Fach Chirurgie

ab 2007    
Oberarzt; UKS Homburg/Saar

Facharzt für Chirurgie (nach WBO 2004)

Vollapprobation als Arzt

Studium an der Medizinischen Fakultät Charité, Campus Virchow-Klinikum, der Humboldt-Universität zu Berlin

Studium an der Medizinischen Fakultät der Freien Universität zu Berlin

  • Mitautor in Tilman Sauerbruch (Hrsg.): Therapie-Handbuch - Gastroenterologie und Hepatologie. 2001. ISBN Number 9783437096679
  • Schön MR, Akkoc N, Schrem H, Keech G, Kräutlein K, Lemmens HP, Wolf S, Tominaga M, Kollmar O, Neuhaus P. -glutathione-s-transferase is a sensitive marker of hepatocellular damage due to warm or cold ischemia in pig liver transplantation. Transplant Proc 1997; 29: 3036-3038.
  • Schön MR, Heil W, Benckert C, Matthes M, Akkoc N, Kollmar O, Wolf S, Neuhaus P. Influence of cold and warm ischemia on amino acid profiles after liver transplantation. Transplant Proc 1998; 30: 2314-1316.
  • Schön MR, Kollmar O, Akkoc N, Matthes M, Wolf S, Schrem H, Tominaga M, Keech G, Neuhaus P. Cold ischemia affects sinusoidal endothelial cells while warm ischemia affects hepatocytes in liver transplantation. Transplant Proc 1998; 30: 2318-2320.
  • Schön MR, Akkoc N, Heil W, Wolf S, Matthes M, Schrem H, Kollmar O, Neuhaus P. Die Bestimmung der -Glutathion-S-Transferase-Konzentration zur Beurteilung hepatozellulärer Ischämieschäden im Vergleich zu GOT, GPT und LDH im Lebertransplantationsmodell. J Lab Med 1999; 23: 218-226.
  • Schilling MK, Forssmann U, Kollmar O, Büchler MW. Rectus abdominis musculoperitoneal flap for closure of bladder defect. J Urol 2000; 163: 1517.
  • Kollmar O, Schilling MK, Büchler MW. Treatment of chyloperitoneum after extended lymphatic dissection during duodeno-pancreatectomy – Case report and review of the literature. Int J Pancreatol 2000; 27: 83-87.
  • Schön MR, Kollmar O, Wolf S, Schrem H, Matthes M, Akkoc N, Schnoy N, Neuhaus P. Liver transplantation after organ preservation with normothermic extracorporeal perfusion. Ann Surg 2001; 233: 114-123.
  • Schilling MK, Maurer CA, Kollmar O, Büchler MW. Primary vs. secondary anastomosis after sigmoid colon resection for perforated diverticulitis (Hinchey stage III and IV): a prospective outcome and cost analysis. Dis Colon Rectum 2001; 44: 699-705.
  • Schilling MK, Maurer CA, Kollmar O, Büchler MW. Ösophagusersatz mittels Fundusrotationsplastik. Zbl Chir 2001; 126: Suppl 1 1-3.
  • Fukuda C, Kollmar O, Schäfer T, Tian YH, Schilling MK. Anionic polysaccharides: a substance class with hepatopretective and antiadhesive properties in rat liver preservation. Transpl Int 2002; 15: 17-23.
  • Kollmar O, Becker S, Schilling MK, Maurer CA. Intestinal lymphoma perforations as a consequence of highly effective anti-CD20 antibody therapy. Transplantation 2002; 73: 669-670.
  • Kollmar O, Z`graggen K, Schilling MK, Buchholz BM, Büchler MW. The suprapubic approach for laparoscopic appendectomy. Surg Endosc 2002; 16: 504-508.
  • Kollmar O, Lindemann W, Richter S, Steffen I, Pistorius G, Schilling MK. Boerhaave’s syndrome: primary repair vs. esophageal resection – case reports and meta-analysis of the literature. J Gastrointest Surg 2003; 7: 726-734.
  • Kollmar O, Richter S, Schilling MK, Menger MD, Pistorius GA. Advanced hepatic tissue destruction in ablative cryosurgery: potentials of intermittent freezing and selective vascular inflow occlusion. Cryobiology 2004; 48: 263-272.
  • Kollmar O, Richter S, Czyborra J, Menger MD, Dietrich S, Schilling MK, Kirsch CM, Pistorius GA. Aprotinin inhibits local platelet trapping and improves tissue destruction in hepatic cryosurgery. Surgery 2004; 136: 624-632.
  • Kollmar O, Schilling MK, Menger MD. Experimental liver metastasis: standards for local cell implantation to study isolated tumor growth in mice. Clin Exp Metastasis 2004; 21: 453-460.
  • Kollmar O, Scheuer C, Menger MD, Schilling MK. Macrophage Inflammatory Protein-2 promotes angiogenesis, cell migration, and tumor growth in hepatic metastasis. Ann Surg Oncol 2006; 13: 263-275.
  • Kollmar O, Menger MD, Schilling MK. Macrophage inflammatory protein (MIP)-2 contributes to liver resection-induced acceleration of hepatic metastatic tumor growth. World J Gastroenterol 2006; 12: 858-867.
  • Schilling MK, Kollmar O, Richter S. Management im OP als Teil eines übergreifenden Prozessmanagements. Viszeralchirurgie 2006; 41: 85-88.
  • Richter S, Kollmar O, Neunhoeffer E, Schilling MK, Menger MD, Pistorius GA. Differential response of arteries and veins upon bipolar vessel sealing: evaluation of a novel reusable device. J Laparoendosc Adv Surg Tech A 2006; 16:149-155.
  • Richter S, Lindemann W, Kollmar O, Pistorius GA, Maurer CA, Schilling MK. One-stage sigmoid colon resection for perforated sigmoid diverticulitis (Hinchey stages III and IV) World J Surg 2006; 30:1027-1032.
  • Richter S, Kollmar O, Schilling MK, Pistorius GA, Menger MD. Efficacy and quality of vessel sealing: Comparison of a reusable with a disposable device and effects of clamp surface geometry and structure. Surg Endosc 2006; 20:890-894.
  • Moussavian MR, Kollmar O, Richter S, Igna D, Schilling MK. Liver transplantation of a HELLP syndrome donor liver in acute fulminant hepatitis B with deltavirus coinfection. Transpl Int 2006; 19:1030-1031.
  • Richter S, Kollmar O, Lindemann W, Schilling MK. Transureteroureterostomy allows renal sparing radical resection of advanced malignancies with rectosigmoid invasion. Int J Colorectal Dis 2007; 22: 949-953.
  • Rupertus K, Kollmar O, Scheuer C, Junker B, Menger MD, Schilling MK. Major but not minor hepatectomy accelerates engraftment of extrahepatic tumor cells. Clin Exp Metastasis 2007; 24:39-48.
  • Kollmar O, Junker B, Rupertus K, Menger MD, Schilling MK. Studies on MIP-2 and CXCR2 expression in a mouse model of extrahepatic colorectal metastasis. Eur J Surg Oncol 2007; 33: 803-811.
  • Kollmar O, Corsten M, Scheuer C, Vollmar B, Schilling MK, Menger MD. Portal branch ligation induces a hepatic arterial buffer response, microvascular remodeling, normoxygenation and cell proliferation in portal blood-deprived liver tissue. Am J Physiol Gastrointest Liver Physiol 2007; 292: G1534-1542.
  • Kollmar O, Moussavian MR, Bolli M, Richter S, Schilling MK. Pancreatojejunal leakage after pancreas head resection: anatomic and surgeon-related factors. J Gastrointest Surg 2007; 11:1699-1703.
  • Rubie C, Frick VO, Pfeil S, Wagner M, Kollmar O, Kopp B, Graber S, Rau BM, Schilling MK. Correlation of IL-8 with induction, progression and metastatic potential of colorectal cancer. World J Gastroenterol 2007; 13: 4996-5002.
  • Moussavian MR, Slotta JE, Kollmar O, Menger MD, Schilling MK, Gronow G. Hemoglobin induces cytotoxic damage of glycine-preserved renal tubules. Transpl Int 2007; 20: 884-894.
  • Kollmar O, Rupertus K, Scheuer C, Junker B, Tilton B, Schilling MK, Menger MD. Stromal cell-derived factor-1 promotes cell migration and tumor growth of colorectal metastasis. Neoplasia 2007; 9:862-870.
  • Moussavian MR, Kollmar O, Jacob P, Richter S, Schilling MK. Rechtliche Regelung der Organspende: Eine Internet basierte Umfrage. Transplantationsmedizin 2007; 19: 117-122.
  • Nabhan A, Al-Yhary A, Ishak B, Steudel WI, Kollmar O, Steimer O. Analysis of spinal kinematics following implantation of lumbar spine disc prostheses versus fusion: radiological study. J Long Term Eff Med Implants 2007;17:207-216.
  • Kollmar O, Junker B, Rupertus K, Scheuer C, Menger MD, Schilling MK. Liver resection-associated Macrophage Inflammatory Protein-2 stimulates engraftment but not growth of colorectal metastasis at extrahepatic sites. J Surg Res 2008; 145: 295-302.
  • Moussavian MR, Slotta JE, Kollmar O, Menger MD, Gronow G, Schilling MK. Post-hypoxic cellular disintegration in glycine-preserved renal tubules is attenuated by hydroxyl radical scavengers and iron chelators. Langenbecks Arch Surg 2008; 393: 303-310.
  • Kollmar O, Moussavian MR, Richter S, de Roi P, Maurer CA, Schilling MK. Prophylactic octreotide and delayed gastric emptying after pancreaticoduodenectomy: Results of a prospective randomized double-blinded placebo-controlled trial. Eur J Surg Oncol 2008; 34: 868-875.
  • Kollmar O, Moussavian MR, Richter S, Bolli M, Schilling MK. Surgery of liver metastasis in gynecological cancer – indication and results. Onkologie 2008; 31: 375-379.
  • Rubie C, Kollmar O, Frick VO, Wagner M, Brittner B, Gräber S, Schilling MK. Differential CXC Receptor Expression in Colorectal Carcinomas. Scand J Immunol 2008; 68: 635-644
  • Moussavian MR, Richter S, Kollmar O, Schuld J, Schilling MK. Staged lavage versus single high volume lavage in the treatment of feculent / purulent peritonitis: a matched pair analysis. Langenbecks Arch Surg 2009; 394: 215-20.
  • Justinger C, Moussavian MR, Schlueter C, Kopp B, Kollmar O, Schilling MK. Antibacterial coating of abdominal closure sutures and wound infection. Surgery 2009; 145:330-334.
  • Richter S, Kollmar O, Schuld J, Moussavian MR, Igna D, Schilling MK; for the Chirurgische Arbeitsgemeinschaft OP-Technik und OP-Strukturen (CAOP) of the Deutsche Gesellschaft für Allgemein- und Viszeralchirurgie. Randomized clinical trial of efficacy and costs of three dissection devices in liver resection. Br J Surg 2009; 96: 593–601.
  • Rupertus K, Dahlem C, Menger MD, Schilling MK, Kollmar O. Rapamycin inhibits hepatectomy-induced stimulation of metastatic tumor growth by reduction of angiogenesis, microvascular blood perfusion, and tumor cell proliferation. Ann Surg Oncol 2009; 16: 2629-2637.
  • Moussavian MR, Kollmar O, Schmidt M, Scheuer C, Wagner M, Slotta JE, Gronow G, Justinger C, Menger MD, Schilling MK. Amiodarone pretreatment of organ donors exerts anti-oxidative protection but induces excretory dysfunction in liver preservation and reperfusion. Liver Transpl 2009; 15: 763-775.
  • Schuld J, Richter S, Moussavian MR, Kollmar O, Schilling MK. [A totally implantable venous access device. Implantation in general or local anaesthesia? A retrospective cost analysis] Zentralbl Chir 2009; 134: 345-349.
  • Engelberger S, Schuld J, Schilling MK, Kollmar O. Cholecystocolonic fistula prevents upper intestinal obstruction by a large gallstone after perforation into the duodenum. Langenbecks Arch Surg 2010; 395: 95-97.
  • Kollmar O, Rupertus K, Scheuer C, Nickels RM, Haberl GC, Tilton B, Menger MD, Schilling MK. CXCR4 and CXCR7 regulate angiogenesis and CT26.WT tumor growth independent from SDF-1. Int J Cancer 2010; 126: 1302-1315.
  • Schäfer T, Sperling J, Kollmar O, Richter S, Schilling MK, Menger MD, Lindemann W. Early effect of hepatic artery TNF-alpha infusion on systemic hemodynamics and inflammation: a dose-response study in pigs. Int J Colorectal Dis 2010; 25: 523-532.
  • Justinger C, Sperling J, Katoh M, Kollmar O, K Schilling M, Schuld J. Retroperitoneal abscess with consecutive acute renal failure caused by a lost gallstone 2 years after laparoscopic cholecystectomy. Langenbecks Arch Surg 2010;395:285-287.
  • Frymerman AS, Schuld J, Ziehen P, Kollmar O, Justinger C, Merai M, Richter S, Schilling MK, Moussavian MR. Impact of postoperative pancreatic fistula on surgical outcome - the need for a classification-driven risk management. J Gastrointest Surg 2010; 14: 711-718.
  • Moussavian MR, Schuld J, Dauer D, Justinger C, Kollmar O, Schilling MK, Richter S. Long term follow up for incisional hernia after severe secondary peritonitis-incidence and risk factors. Am J Surg 2010; 200: 229-234.
  • Richter S, Sperling J, Kollmar O, Menger MD, Schilling MK. Laser Doppler flowmetry of hepatic microcirculation during Pringle’s manoeuvre: determination of spatial and temporal liver tissue perfusion heterogeneity. Eur Surg Res 2010; 44: 152-158.
  • Kollmar O, Corsten M, Scheuer C, Vollmar B, Schilling MK, Menger MD. Tumour growth following portal branch ligation in an experimental model of liver metastases. Br J Surg 2010; 97: 917-926.
  • Rupertus K, Sperling J, Corsten M, Scheuer C, Nickels RM, Schilling MK, Menger MD, Kollmar O. Darbepoetin-alpha enhances hepatectomy-associated stimulation of colorectal liver metastatic growth. Ann Surg 2010; 252:131-141; Comment in Nat Rev Clin Oncol 2010; 7: 482. Reseach Highlight Richards L. Hepatectomy induced metastasis.
  • Moussavian MR, Scheuer C, Schmidt M, Kollmar O, Wagner M, von Heesen M, Schilling MK, Menger MD. Multidrug donor preconditioning prevents cold liver preservation and reperfusion injury. Langenbecks Arch Surg 2011; 396: 231-241.
  • Schuld J, Moussavian MR, Frank B, Schmidt UA, Kollmar O, Schilling MK, Richter S. [Increasing efficiency and patient satisfaction by structured clinical processes in presurgical visits.] Unfallchirurg 2011; 114:1091-1098.
  • Schuld J, Justinger C, Wagner M, Bohle RM, Kollmar O, Schilling MK, Richter S. Bronchobiliary fistula: a rare complication of hepatic endometriosis. Fertil Steril 2011; 95: 804.e15-8.
  • Rubie C, Frick VO, Ghadjar P, Wagner M, Justinger C, Faust SK, Vicinus B, Gräber S, Kollmar O, Schilling MK. CXC receptor-4 mRNA silencing abrogates CXCL12-induced migration of colorectal cancer cells. J Transl Med 2011; 9: 22.
  • Schuld J, Justinger C, Kollmar O, Schilling MK, Richter S. Contribution of final-year medical students to operation room performance-economical and educational implications. Langenbecks Arch Surg 2011; 396: 1239-1244.
  • von Heesen M, Hülser M, Seibert K, Scheuer C, Dold S, Kollmar O, Wagner M, Menger MD, Schilling MK, Moussavian MR. Split-liver procedure and inflammatory response: improvement by pharmacological preconditioning. J Surg Res 2011; 168: e125-135.
  • Justinger C, Schuld J, Sperling J, Kollmar O, Richter S, Schilling MK. Triclosan-coated sutures reduce wound infections after hepatobiliary surgery-a prospective non-randomized clinical pathway driven study. Langenbecks Arch Surg 2011; 396:845-850.
  • Diener MK, Seiler CM, Rossion I, Kleeff J, Glanemann M, Butturini G, Tomazic A, Bruns CJ, Busch OR, Farkas S, Belyaev O, Neoptolemos JP, Halloran C, Keck T, Niedergethmann M, Gellert K, Witzigmann H, Kollmar O, Langer P, Steger U, Neudecker J, Berrevoet F, Ganzera S, Heiss MM, Luntz SP, Bruckner T, Kieser M, Büchler MW. Efficacy of stapler versus hand-sewn closure after distal pancreatectomy (DISPACT): a randomised, controlled multicentre trial. Lancet 2011; 377: 1514-1522.
  • Kollmar O, Sperling J, Moussavian MR, Kubulus D, Richter S, Schilling MK. Delayed Gastric Emptying after Pancreaticoduodenectomy: Influence of the Orthotopic Technique of Reconstruction and Intestinal Motilin Receptor Expression. J Gastrointest Surg 2011; 15: 1158-1167.
  • Schuld J, Slotta JE, Schuld S, Kollmar O, Schilling MK, Richter S. Popular belief meets surgical reality: impact of lunar phases, friday the 13th and zodiac signs on emergency operations and intraoperative blood loss. World J Surg 2011; 35:1945-1949.
  • Schuld J, Sperling J, Kollmar O, Menger MD, Schilling MK, Richter S, Laschke MW. The nightknife©: evaluation of efficiency and quality of bipolar vessel sealing. J Laparoendosc Adv Surg Tech A 2011; 21: 659-663.
  • Rubie C, Frick VO, Ghadjar P, Wagner M, Justinger C, Graeber S, Sperling J, Kollmar O, Schilling MK. Effect of preoperative FOLFOX chemotherapy on CCL20/CCR6 expression in colorectal liver metastases. World J Gastroenterol 2011; 17: 3109-3116.
  • Jeanmonod P, Sperling J, Seidel R, Richter S, Kollmar O, Schuld J. Torquated giant appendix epiploica mimicking intraperitoneal liposarcoma: report of a case. Int Surg 2011; 96: 117-119.
  • Veigel S, Schmid A, Kollmar O, Schuld J, Bialas P, Kopp B, Schilling M, Moussavian MR. Reduced Time-Frame for Ward Rounds and Patient Satisfaction. Zentralbl Chir 2012; 137: 187-195.
  • Sperling J, Schäfer T, Ziemann C, Benz A, Kollmar O, Schilling MK, Menger MD. Hepatic arterial infusion of bevacizumab in combination with oxaliplatin reduces tumor growth in a rat model of colorectal liver metastases. Clin Exp Met 2012; 29: 91-99.
  • von Heesen M, Schuld J, Sperling J, Grünhage F, Lammert F, Richter S, Schilling MK, Kollmar O. Parenchyma-preserving hepatic resection for colorectal liver metastases. Langenbecks Arch Surg 2012; 397: 383-395.
  • Rupertus K, Haberl GCY, Scheuer C, Menger MD, Schilling MK, Kollmar O. Bone Marrow Suppression by c-Kit Blockade Enhances Tumor Growth of Colorectal MetastaSES Through the Action of Stromal Cell-Derived Factor-1. J Oncol 2012; 2012: 196957.
  • Molinger EL, Meier CM, Schilling MK, Kollmar O. Resection of Choledochal Cysts - as Early as Possible? Klin Padiatr 2012; 224:92-93.
  • Kauffels A, Schuld J, Schilling MK, Kollmar O. Giant midoesophageal diverticulum-case report and review of the literature. J Gastrointest Surg 2012; 16:1240-1244.
  • Justinger C, Schilling MK, Kees MG, Kauffels A, Hirschmann K, Kopp B, Kees F, Kollmar O. Penetration of moxifloxacin into liver tissue. Int J Antimicrob Agents 2012; 39:505-509.
  • Schuld J, Kollmar O, Seidel R, Black C, Schilling MK, Richter S. Estimate or calculate? How surgeons rate volumes and surfaces. Langenbecks Arch Surg 2012; 397:763-769.
  • Schäfer T, Sperling J, Slotta JE, Kollmar O, Schilling MK, Menger MD, Richter S. Hepatic Arterial Infusion with Tumor Necrosis Factor-α Induces Early Hepatic Hyperperfusion. Eur Surg Res 2012; 48:215-222.
  • Haupenthal J, Bihrer V, Korkusuz H, Kollmar O, Schmithals C, Kriener S, Engels K, Pleli T, Benz A, Canamero M, Longerich T, Kronenberger B, Richter S, Waidmann O, Vogl TJ, Zeuzem S, Piiper A. Reduced Efficacy of the Plk1 Inhibitor BI 2536 on the Progression of Hepatocellular Carcinoma due to Low Intratumoral Drug Levels. Neoplasia 2012; 14:410-419.
  • Jeanmonod P, Hubbuch M, Grünhage F, Meiser A, Rass K, Schilling MK, Kollmar O. Graft-versus-host disease or toxic epidermal necrolysis: diagnostic dilemma after liver transplantation. Transpl Infect Dis 2012; 14:422-426.
  • Sperling J, Ziemann C, Schuld J, Laschke MW, Schilling MK, Menger MD, Kollmar O. A comparative evaluation of ablations produced by high-frequency coagulation-, argon plasma coagulation-, and cryotherapy devices in porcine liver. Int J Colorectal Dis 2012; 27:1229-1235.
  • Schuld J, Kollmar O, Schlüter C, Schilling MK, Richter S. Normative values in anorectal manometry using microtip technology: A cohort study in 172 subjects. Int J Colorectal Dis 2012; 27: 1199-1205.
  • Schuld J, Bobkowski M, Shayesteh-Kheslat R, Kollmar O, Richter S, Schilling MK. [Benchmarking surgical resources - a work sampling analysis at a German university hospital.] Zentralbl Chir 2013; 138: 151-156.
  • Schuld J, Richter S, Oberkircher LW, Seeland U, Debnar-Daumler KI, Rauch J, Menger MD, Schilling MK, Kollmar O. Evidence for tumor cell spread during local hepatic ablation of colorectal liver metastases. J Surg Res 2012; 178: 268-279.
  • Rupertus K, Senger S, Menger MD, Schilling MK, Kollmar O. Darbepoetin-α Promotes Neovascularization and Cell Proliferation in Established Colorectal Liver Metastases. J Surg Res 2012; 176: 517-523.
  • Droeser RA, Jeanmonod P, Schuld J, Moussavian MR, Schilling MK, Kollmar O. Octreotide prophylaxis is not beneficial for biochemical activity and clinical severity of postoperative pancreatic fistula after pancreatic surgery. Dig Surg 2012; 29: 484-491.
  • Schuld J, Moussavian MR, Kollmar O, Maurer CA, Richter S, Schilling MK. Objective measurable anoneorectal function poorly correlates with the overall quality of life after mesorectal excision for rectal cancer. Eur Surg 2012; 44: 184-190.
  • Sperling J, Schäfer T, Benz-Weißer A, Ziemann C, Scheuer C, Kollmar O, Schilling MK, Menger MD. Hepatic arterial infusion but not systemic application of cetuximab in combination with oxaliplatin significantly reduces growth of CC531 colorectal rat liver metastases. Int J Colorectal Dis 2013; 28: 555-562.
  • Sperling J, Brandhorst D, Schäfer T, Ziemann C, Benz-Weißer A, Scheuer C, Kollmar O, Schilling MK, Menger MD. Liver-directed chemotherapy of cetuximab and bevacizumab in combination with oxaliplatin is more effective to inhibit tumor growth of CC531 colorectal rat liver metastases than systemic chemotherapy. Clin Exp Metastasis 2013; 30: 447-455.
  • Justinger C, Slotta JE, Ningel S, Gräber S, Kollmar O, Schilling MK. Surgical-site infection after abdominal wall closure with triclosan-impregnated polydioxanone sutures: Results of a randomized clinical pathway facilitated trial (NCT00998907). Surgery 2013; 154: 589-595.
  • Sperling J, Ziemann C, Gittler A, Benz-Weißer A, Menger MD, Kollmar O. Hepatic arterial infusion of temsirolimus inhibits tumor growth of colorectal rat liver metastases even after a growth stimulating procedure like liver resection. J Surg Res 2013; 185: 587-594.
  • Schuld J, Kollmar O, Schuld S, Schommer K, Richter S. Impact of Meteorological Conditions on Abdominal Aortic Aneurysm Rupture: Evaluation of an 18-Year Period and Review of the Literature. Vasc Endovascular Surg 2013; 47: 524-531.
  • Beck J, Bierau S, Balzer S, Andag R, Kanzow P, Schmitz J, Gaedcke J, Mörer O, Slotta JE, Walson P, Kollmar O, Oellerich M, Schütz E. Digital droplet PCR for quantification of donor DNA in the circulation of transplant recipients as a potential universal rejection biomarker. Clin Chem 2013; 59: 1732-1741.
  • Slotta JE, Justinger C, Kollmar O, Kollmar C, Schäfer T, Schilling MK. Liver injury following blunt abdominal trauma: a new mechanism-driven classification. Surg Today 2014; 44: 241-246.
  • Oellerich M, Schütz E, Kanzow P, Schmitz J, Beck J, Kollmar O, Streit F, Walson PD. Use of graft-derived cell-free DNA as an organ integrity biomarker to reexamine effective tacrolimus trough concentrations after liver transplantation. Ther Drug Monit 2014; 36: 136-140.
  • Slotta JE, Schuld J, Distler S, Richter S, Schilling MK, Kollmar O. Hepatic resection of non-colorectal and non-neuroendocrine liver metastases - survival benefit for patients with non-gastrointestinal primary cancers - a case-controlled study. Int J Surg 2014; 12: 163-168.
  • Rupertus K, Sinistra J, Scheuer C, Nickels RM, Schilling MK, Menger MD, Kollmar O. Interaction of the chemokines I-TAC (CXCL11) and SDF-1 (CXCL12) in the regulation of tumor angiogenesis of colorectal cancer. Clin Exp Metastasis 2014; 31: 447-459.
  • Schuld J, Richter S, Kollmar O. The role of cryosurgery in the treatment of colorectal liver metastases: a matched-pair analysis of cryosurgery vs. liver resection. Hepato-Gastroenterol 2014; 61: 192-196.
  • Senger S, Kollmar O, Menger MD, Schilling MK, Rupertus K. Darbepoetin-α accelerates neovascularization and engraftment of extrahepatic colorectal metastases. Eur Surg Res 2014; 53: 25-36.
  • Sperling J, Justinger C, Schuld J, Ziemann C, Seidel R, Kollmar O. Intrahepatic cholangiocarcinoma in a transplant liver - selective internal radiation therapy followed by right hemihepatectomy: report of a case. World J Surg Oncol 2014; 12: 198. doi: 10.1186/1477-7819-12-198.
  • Strowitzki MJ, Dold S, von Heesen M, Körbel C, Scheuer C, Moussavian MR, Schilling MK, Kollmar O, Menger MD. The phosphodiesterase 3 inhibitor cilostazol does not stimulate growth of colorectal liver metastases after major hepatectomy. Clin Exp Metastasis 2014; 31: 795-803.
  • Kanzow P, Kollmar O, Schütz E, Oellerich M, Schmitz J, Beck J, Walson PD, Slotta JE. Graft-Derived Cell-Free DNA as an Early Organ Integrity Biomarker After Transplantation of a Marginal HELLP Syndrome Donor Liver. Transplantation 2014;98: e43-e45.
  • Slotta JE, Schilling MK, Ghadimi M, Kollmar O. [Advance Directives - Not a Lot of Margin for Error - The Surgeon's View of a Complex Medical-Legal Topic.] Zentralbl Chir 2015; 140 376-381.
  • Feng T, Dzieran J, Gu X, Marhenke S, Vogel A, Machida K, Weiss TS, Rümmele P, Kollmar O, Hoffmann P, Graesser F, Allgayer H, Fabian J, Weng HL, Teufel A, Maass T, Meyer C, Lehmann U, Zhu C, Mertens PR, Gao CF, Dooley S, Meindl-Beinker NM. Smad7 regulates compensatory hepatocyte proliferation in damaged mouse liver and positively relates to better clinical outcome in human hepatocellular carcinoma. Clin Sci 2015; 128: 761-774.
  • Adam R, Karam V, Delvart V, Trunečka P, Samuel D, Bechstein WO, Němec P, Tisone G, Klempnauer J, Rossi M, Rummo OO, Dokmak S, Krawczyk M, Pratschke J, Kollmar O, Boudjema K, Colledan M, Ericzon BG, Mantion G, Baccarani U, Neuhaus P, Paul A, Bachellier P, Zamboni F, Hanvesakul R, Muiesan P; all contributing centers ( and the European Liver Intestine Transplant Association (ELITA). Improved survival in liver transplant recipients receiving prolonged-release tacrolimus in the European liver transplant registry. Am J Transplant 2015; 15: 1267-1282.
  • Sperling J, Ziemann C, Gittler A, Benz-Weißer A, Menger MD, Kollmar O. Tumour growth of colorectal rat liver metastases is inhibited by hepatic arterial infusion of the mTOR-inhibitor temsirolimus after portal branch ligation. Clin Exp Metastasis 2015; 32: 313-321.
  • Shayesteh-Kheslat R, Kauffels A, Rubie C, Frick VO, Wagner M, Kollmar O, Schilling MK. Proangiogenic potency of MUC18 in arteriosclerotic disease. J Cardiovasc Surg 2015; 56: 409-415.
  • von Heesen M, Dold S, Müller S, Scheuer C, Kollmar O, Schilling MK, Menger MD, Moussavian MR. Cilostazol improves hepatic blood perfusion, microcirculation, and liver regeneration after major hepatectomy in rats. Liver Transpl 2015; 21: 792-800.
  • Hoffmann K, Ganten T, Gotthardtp D, Radeleff B, Settmacher U, Kollmar O, Nadalin S, Karapanagiotou-Schenkel I, von Kalle C, Jäger D, Büchler MW, Schemmer P. Impact of neo-adjuvant Sorafenib treatment on liver transplantation in HCC patients - a prospective, randomized, double-blind, phase III trial. BMC Cancer 2015; 15: 392.
  • Slotta JE, Kollmar O, Ellenrieder V, Ghadimi BM, Homayounfar K. Hepatocellular carcinoma: Surgeon's view on latest findings and future perspectives. World J Hepatol 2015; 7: 1168-1183.
  • Arora AS, Zafar S, Kollmar O, Llorens F, Tahir W, Vanselow S, Kumar P, Schmerr MJ, Schmitz M, Zerr I. Application of capillary immunoelectrophoresis revealed an age- and gender-dependent regulated expression of PrPC in liver. Electrophoresis 2015; 36: 3026-3033.
  • Dold S, Richter S, Kollmar O, von Heesen M, Scheuer C, Laschke MW, Vollmar B, Schilling MK, Menger MD. Portal Hyperperfusion after Extended Hepatectomy Does Not Induce a Hepatic Arterial Buffer Response (HABR) but Impairs Mitochondrial Redox State and Hepatocellular Oxygenation. PLoS One 2015; 10: e0141877.
  • Schmickler J, Widmer F, Kauffels A, Kollmar O, Mausberg RF, Ziebolz D. Deutsche Zahnärztliche Zeitung (DZZ) 2016; 71 (2).
  • Oellerich M, Walson PD, Beck J, Schmitz J, Kollmar O, Schütz E. Graft-Derived Cell-Free DNA as a Marker of Transplant Graft Injury. Ther Drug Monit 2016; 38 Suppl 1: S75-79.
  • Senger S, Kollmar O, Menger MD, Rupertus K. Darbepoetin-α Promotes Cell Proliferation in Established Extrahepatic Colorectal Tumors after Major Hepatectomy. Eur Surg Res 2016; 56: 49-60.
  • Schmalz G, Kollmar O, Vasko R, Müller GA, Haak R, Ziebolz D. Oral health-related quality of life in patients on chronic haemodialysis and after kidney transplantation. Oral Dis 2016; 22: 665-672.
  • Schmalz G, Kauffels A, Kollmar O, Slotta JE, Vasko R, Müller GA, Haak R, Ziebolz D. Oral behavior, dental, periodontal and microbiological findings in patients undergoing hemodialysis and after kidney transplantation. BMC Oral Health 2016; 16: 72.
  • Sperling J, Schuld J, Hechler AM, Slotta JE, Kollmar O. Extended versus standard lymphadenectomy in patients undergoing pancreaticoduodenectomy for periampullary adenocarcinoma: a prospective randomized single center trial. Eur Surg 2016; 48: 26-33.
  • Schuld J, von Heesen M, Jung B, Richter S, Kollmar O. Simultaneous resection of primary colorectal cancer and synchronous liver metastases is associated with a high cardiovascular complication rate. Eur Surg 2016; 48: 221-227.
  • Xu M, Alwahsh SM, Ramadori G, Kollmar O, Slotta JE. Upregulation of hepatic melanocortin 4 receptor during rat liver regeneration. J Surg Res 2016; 203: 222-230.
  • Ziebolz D, Schmalz G, Kauffels A, Widmer F, Widmer K, Slotta JE, Mausberg RF, Kollmar O. Periodontal pathogenic bacteria and aMMP-8 findings depending on periodontal conditions of patients before and after liver transplantation. Clin Oral Investig 2017; 21: 745-752.
  • Slotta JE, Kopsch U, Ghadimi M, Kollmar O. Management of acute appendicitis : Evidence for prompt surgical treatment? Chirurg 2017; 88: 503-511.
  • Ibrahim AA, Schmithals C, Kowarz E, Köberle V, Kakoschky B, Pleli T, Kollmar O, Nitsch S, Waidmann O, Finkelmeier F, Zeuzem S, Korf HW, Schmid T, Weigert A, Kronenberger B, Marschalek R, Piiper A. Hypoxia Causes Downregulation of Dicer in Hepatocellular Carcinoma, Which Is Required for Upregulation of Hypoxia-Inducible Factor 1α and Epithelial-Mesenchymal Transition. Clin Cancer Res 2017; 23: 3896-3905.
  • Lai Q, Feys E, Karam V, Adam R, Klempnauer J, Oliverius M, Mazzaferro V, Pascher A, Remiszewski P, Isoniemi H, Pirenne J, Foss A, Ericzon BG, Markovic S, Lerut JP; European Liver Intestine Transplant Association (ELITA). Collaborators: Baccarani U, Bechstein WO, Berenguer M, Berlakovich G, Bourgeon A, Büchler P, Calise F, Seiler C, Charco R, Coker A, Detry O, Fabregat J, Fernandez Selléz C, Ghinolfi D, Fondevilla C, Gerunda GE, Graziadei I, Halkic N, Hannoun L, Holscher A, Kobori L, Kollmar O, Majno P, Mantion G, Metselaar H, Mirza D, Nemec P, Olausson M, de Urbina JO, Paul A, Pisarski P, Rasmussen A, Rolles K, Rossi M, Rummo OO, Salizzoni M, Tokat Y, Troisi R, Väli T, Wolf P. Hepatic Epithelioid Hemangioendothelioma and Adult Liver Transplantation: Proposal for a Prognostic Score Based on the Analysis of the ELTR-ELITA Registry. Transplantation 2017; 101: 555-564.
  • Kauffels A, Schmalz G, Kollmar O, Slotta JE, Weig M, Groß U, Bader O, Ziebolz D. Oral findings and dental behaviour before and after liver transplantation - a single-centre cross-sectional study. Int Dent J 2017; 67: 244-251.
  • Schütz E, Fischer A, Beck J, Harden M, Koch M, Wuensch T, Stockmann M, Nashan B, Kollmar O, Matthaei J, Kanzow P, Walson PD, Brockmöller J, Oellerich M. Graft-derived cell-free DNA, a noninvasive early rejection and graft damage marker in liver transplantation: A prospective, observational, multicenter cohort study. PLoS Med 2017; 14: e1002286.
  • Senger S, Sperling J, Oberkircher B, Schilling MK, Kollmar O, Menger MD, Ziemann C. Portal branch ligation does not counteract the inhibiting effect of temsirolimus on extrahepatic colorectal metastatic growth. Clin Exp Metastasis 2017; 34: 323-332.
  • Otto G, Heise M, Thies J, Pitton M, Schneider J, Kaiser G, Neuhaus P, Kollmar O, Barthels M, Geks J, Bechstein WO, Hellinger A, Klempnauer J, Padberg W, Frühauf N, Ebbing A, Mauer D, Schneider A, Kwiecien R, Kronfeld K. Liver Preservation by Aortic Perfusion Alone Compared With Preservation by Aortic Perfusion and Additional Arterial Ex Situ Back-Table Perfusion With Histidine-Tryptophan-Ketoglutarate Solution: A Prospective, Randomized, Controlled, Multicenter Study. Transplant Direct 2017; 3: e183.
  • Hoffmann A, von Heesen M, Kollmar O, Kiesslich. Endoscopic resection techniques. Visc Med 2017; 33: 285-294.
  • Schmalz G, Meisel A, Kollmar O, Kauffels A, Slotta JE, Kottmann T, Haak R, Ziebolz D. Oral health-related quality of life depending on dental and periodontal health in different patients before and after liver transplantation. Clin Oral Investig 2018; 22: 2039-2045.
  • Schmalz G, Wendorff H, Berisha L, Meisel A, Widmer F, Marcinkowski A, Teschler H, Sommerwerck U, Haak R, Kollmar O, Ziebolz D. Association between the time after transplantation and different immunosuppressive medications with dental and periodontal treatment need in patients after solid organ transplantation. Transpl Infect Dis 2018; e12832. doi: 10.1111/tid.12832.
  • Schmalz G, Wendorff H, Berisha L, Widmer F, Marcinkowski A, Teschler H, Sommerwerck U, Haak R, Kollmar O, Ziebolz D. Association between the time after transplantation and different immunosuppressive medications with dental and periodontal treatment need in patients after solid organ transplantation. Med Oral Patol Oral Cir Bucal 2018; 23: e326-e334. doi: 10.4317/medoral.22238.
  • Kujath C, Kollmar O, Ghadimi BM. Ist die akute Appendizitis ein chirurgische Notfall? Chirurg 2019; 90: 183–185.
  • Hess GF, Terracciano L, Heim M, Soysal SD, Kollmar O: Hepatectomy of a Hepatocellular Carcinoma after SIRT in a Cirrhotic Liver. Arch Surg Clin Case Rep 2020 3: 129
  • Schmalz G, Garbade J, Kollmar O, Ziebolz D: Does oral health-related quality of life of patients after solid organ transplantation indicate a response shift? Results of a systematic review. BMC Oral Health. 2020; 20: 356
  • Deutsche Gesellschaft für Chirurgie, seit 01/2002
  • Sektion Chirurgische Forschung e.V. der Deutschen Gesellschaft für Chirurgie, seit 05/2003
  • Arbeitsgemeinschaft für Leber-Galle-Pankreas (CALGP) der Deutschen Gesellschaft für Viszeralchirurgie (DGAV), Gründungsmitglied seit 05/2003
  • Deutsche Gesellschaft für Allgemein- und Viszeralchirurgie (DGAV), seit 06/2007
  • Deutsche Krebsgesellschaft e.V., seit 11/2009
  • Berufsverband der Deutschen Chirurgen (BDC), seit 04/2015
  • Chirurgische Arbeitsgemeinschaft Onkologie (CAO-V) seit 12/2017
  • Exzellenz-Akademie des Konvents der Lehrstuhlinhaber für Allgemein- und Viszeralchirurgie, Mitglied 12/2008 – 12/2012, Senior-Mitglied 01/2013 – 12/2015
  • Stiftung Gesundheit - Mitglied des Experten-Kreises Gesundheit (Wissen ist die beste Medizin: seit 2016