All specialties

Prof. Dr. Hans-Henning Eckstein
General SurgeonMunich, Germany
39+ years of experience
Head of Department
Works At: University Hospital Rechts der Isar
- Prof. Dr. Hans-Henning Eckstein is a Vascular Surgeon with 35 years in the field.
- He is a President of the German Society for Vascular Surgery and Vascular Medicine (DGGG), a member of the Scientific Committee of the Space-1 Study, Editorial Board Der Chirurg, Vascular Surgery, and Commission on Recommendations of the German Society of Neurology (DGN).
- He studied medicine at the Ruprecht Karls University of Heidelberg in 1985 and completed his thesis defense at the same university in 1986.
- In 1997, he did his qualification of the European Board of Surgery in Vascular Surgery, and Habilitation in Surgery, the Ruprecht Karls University of Heidelberg in 1998.
- Prof. Eckstein has a special focus on areas such as endovascular abdominal aortic aneurysm repair, Carotid angioplasty, and Hybrid technique for iliac chronic thrombotic Occlusion recanalization, etc.
- He has been invited as a faculty member at several conferences along with writing journals.
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- Prof. Dr. Hans-Henning Eckstein is a Vascular Surgeon with 35 years in the field.
- He is a President of the German Society for Vascular Surgery and Vascular Medicine (DGGG), a member of the Scientific Committee of the Space-1 Study, Editorial Board Der Chirurg, Vascular Surgery, and Commission on Recommendations of the German Society of Neurology (DGN).
- He studied medicine at the Ruprecht Karls University of Heidelberg in 1985 and completed his thesis defense at the same university in 1986.
- In 1997, he did his qualification of the European Board of Surgery in Vascular Surgery, and Habilitation in Surgery, the Ruprecht Karls University of Heidelberg in 1998.
- Prof. Eckstein has a special focus on areas such as endovascular abdominal aortic aneurysm repair, Carotid angioplasty, and Hybrid technique for iliac chronic thrombotic Occlusion recanalization, etc.
- He has been invited as a faculty member at several conferences along with writing journals.

Prof. Dr. Wolfram T. Knoefel
General SurgeonDusseldorf, Germany
31+ years of experience
Head of Department
Works At: University Hospital Dusseldorf
5.0 (12 Ratings)
- Prof. Dr. Wolfram T. Knoefel is a Dusseldorf-based General, Visceral, and Pediatric Surgeon, with experience of more than 27 years.
- He studied medicine at the University of Hamburg, the University of Lausanne, Harvard Medical School in Boston, and School of Medicine at Mount Sinai in New York.
- After completing his medical practice, he worked in various prestigious organizations such as the Department of Surgery at the University Hospital of Ludwig Maximilian University of Munich, Massachusetts General Hospital, Harvard Medical School, as well as in the Department of Surgery at the University Hospital Hamburg-Eppendorf.
- In 1996, he completed his doctoral thesis on the subject "Disorders of microcirculation in acute pancreatitis".
- Prof. Knoefel's main focus includes the surgical treatment of malignant tumors of the liver, biliary tract, and pancreas, thyroid, lung, and rectum.
- He likes to write articles and book chapters for national and international journals.
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- Prof. Dr. Wolfram T. Knoefel is a Dusseldorf-based General, Visceral, and Pediatric Surgeon, with experience of more than 27 years.
- He studied medicine at the University of Hamburg, the University of Lausanne, Harvard Medical School in Boston, and School of Medicine at Mount Sinai in New York.
- After completing his medical practice, he worked in various prestigious organizations such as the Department of Surgery at the University Hospital of Ludwig Maximilian University of Munich, Massachusetts General Hospital, Harvard Medical School, as well as in the Department of Surgery at the University Hospital Hamburg-Eppendorf.
- In 1996, he completed his doctoral thesis on the subject "Disorders of microcirculation in acute pancreatitis".
- Prof. Knoefel's main focus includes the surgical treatment of malignant tumors of the liver, biliary tract, and pancreas, thyroid, lung, and rectum.
- He likes to write articles and book chapters for national and international journals.

Dr. Matthias Schlensak
Obesity and Bariatric Surgeon
- Dr. Matthias Schlensak is a General & Bariatric Surgeon with experience of more than 29 years in the field.
- He is a member of the German Society of Surgery (DGCH), the German society for general and visceral surgery (DGAV), German Society of Treatment of Obesity (CAADIP), International Federation for the Surgery of Obesity (IFSO), German Surgical Working Group for Minimally Invasive Surgery (CAMIC), and European Hernia Society (EHS).
- He pursued his study in medicine at the University of Essen in 1991.
- He is ranked among the best weight loss surgeons in Germany, Austria, and Switzerland according to the Leading Medicine List.
- Dr. Schlensak has comprehensive knowledge in the field of bariatric surgery, as well as in the treatment of complications after bariatric surgery, and also Gastric Balloon, Mini Port Surgeries, Colonoscopy, Abdominal surgery, and Slimming, etc.
- He has written several publications to his credit in reputed national and international journals.
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- Dr. Matthias Schlensak is a General & Bariatric Surgeon with experience of more than 29 years in the field.
- He is a member of the German Society of Surgery (DGCH), the German society for general and visceral surgery (DGAV), German Society of Treatment of Obesity (CAADIP), International Federation for the Surgery of Obesity (IFSO), German Surgical Working Group for Minimally Invasive Surgery (CAMIC), and European Hernia Society (EHS).
- He pursued his study in medicine at the University of Essen in 1991.
- He is ranked among the best weight loss surgeons in Germany, Austria, and Switzerland according to the Leading Medicine List.
- Dr. Schlensak has comprehensive knowledge in the field of bariatric surgery, as well as in the treatment of complications after bariatric surgery, and also Gastric Balloon, Mini Port Surgeries, Colonoscopy, Abdominal surgery, and Slimming, etc.
- He has written several publications to his credit in reputed national and international journals.

Dr. med. Holger Bahn
General SurgeonFrankfurt, Germany
23+ years of experience
Senior Consultant
Works At: Sachsenhausen Hospital, Frankfurt
- Dr. med. Holger Bahn is a well-known General Surgeon with experience of more than 19 years.
- He pursued his state examination in medicine from FU and HU Berlin from 1991 to 1998.
- He has worked in a multitude of prestigious organizations such as the Martinus Hospital Düsseldorf, Maltese Hospital St. Carolus, St. Hedwig Hospital, Ruppiner Kliniken GmbH, etc.
- Dr. Bahn has extensive experience and professionalism in the field of bariatric surgery, as well as in the treatment of complications after bariatric surgery.
- He has a number of publications to his credit in various reputed national and international journals.
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- Dr. med. Holger Bahn is a well-known General Surgeon with experience of more than 19 years.
- He pursued his state examination in medicine from FU and HU Berlin from 1991 to 1998.
- He has worked in a multitude of prestigious organizations such as the Martinus Hospital Düsseldorf, Maltese Hospital St. Carolus, St. Hedwig Hospital, Ruppiner Kliniken GmbH, etc.
- Dr. Bahn has extensive experience and professionalism in the field of bariatric surgery, as well as in the treatment of complications after bariatric surgery.
- He has a number of publications to his credit in various reputed national and international journals.
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Prof. Dr. Robert Grutzmann
General SurgeonErlangen, Germany
28+ years of experience
Head of Department
Works At: University Hospital Erlangen, Erlangen
5.0 (12 Ratings)
- Prof. Dr. Robert Grutzmann is a General & Visceral Surgeon with experience of more than 24 years.
- He is a member of the Working Group on Hepatobiliary Surgery (CALGP), German Society of General and Abdominal Surgery (DGAV), German Society of Surgery (DGCH), and German Society for Vascular Surgery and Vascular Medicine (DGG).
- He completed his medical studies from 1990 to 1997 at the Berlin Charité University and moved to the University Clinic Dresden, where he received three specialist medical degrees and a Master of Business Administration in Health Care Management.
- Dr. Grutzmann became an international specialist in pancreatic cancer and has been awarded numerous prizes for his research.
- He has published around 120 specialist articles so far - such as the Von Langenbeck Prize of the German Society for Surgery.
- He is specialized in procedures such as gastric sleeve resection, gastric band surgery, biliopancreatic diversion, revision surgeries, minimally invasive procedures, etc.
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- Prof. Dr. Robert Grutzmann is a General & Visceral Surgeon with experience of more than 24 years.
- He is a member of the Working Group on Hepatobiliary Surgery (CALGP), German Society of General and Abdominal Surgery (DGAV), German Society of Surgery (DGCH), and German Society for Vascular Surgery and Vascular Medicine (DGG).
- He completed his medical studies from 1990 to 1997 at the Berlin Charité University and moved to the University Clinic Dresden, where he received three specialist medical degrees and a Master of Business Administration in Health Care Management.
- Dr. Grutzmann became an international specialist in pancreatic cancer and has been awarded numerous prizes for his research.
- He has published around 120 specialist articles so far - such as the Von Langenbeck Prize of the German Society for Surgery.
- He is specialized in procedures such as gastric sleeve resection, gastric band surgery, biliopancreatic diversion, revision surgeries, minimally invasive procedures, etc.

Dr. med. Utz Schernikau
General Surgeon
- Dr. med. Utz Schernikau is a General & Visceral Surgeon with experience of more than 24+ years in the field.
- He is a member of reputed organizations such as the German Society for Visceral Surgery, Berlin Surgical Society, BDC, and many more.
- He studied human medicine in Berlin (Humboldt University) and Dublin (University College) from 1989 - 1996.
- In 2005, he did his further training in sub-specialization in Visceral Surgery at SANA Lichtenberg (Prof. Gellert)
- He received his Ph.D. (prenatal diagnosis of lung malformations, Prof. Bollmann, Charité) in 1997.
- Dr. Schernikau is specialized in procedures like Roux-y gastric bypass, gastric sleeve resection, gastric band surgery, biliopancreatic diversion, revision surgeries, minimally invasive procedures, etc.
- He has more than 60 international journals and more than 10 domestic articles.
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- Dr. med. Utz Schernikau is a General & Visceral Surgeon with experience of more than 24+ years in the field.
- He is a member of reputed organizations such as the German Society for Visceral Surgery, Berlin Surgical Society, BDC, and many more.
- He studied human medicine in Berlin (Humboldt University) and Dublin (University College) from 1989 - 1996.
- In 2005, he did his further training in sub-specialization in Visceral Surgery at SANA Lichtenberg (Prof. Gellert)
- He received his Ph.D. (prenatal diagnosis of lung malformations, Prof. Bollmann, Charité) in 1997.
- Dr. Schernikau is specialized in procedures like Roux-y gastric bypass, gastric sleeve resection, gastric band surgery, biliopancreatic diversion, revision surgeries, minimally invasive procedures, etc.
- He has more than 60 international journals and more than 10 domestic articles.

Prof. Dr. med. Markus Guba
General Surgeon
- Prof. Dr. med. Markus Guba is a General Surgeon specializing in Transplantation and Hepato-Pancreatic-Biliary Surgery with experience of more than 24 years.
- He is a member of the German Society For Surgery, European Society of Transplantation, and American Society of Transplant Surgeons.
- He studied medicine at the University of Regensburg and the Medical School Harare, Zimbabwe, and Eberhard-Karls University of Tübingen (summa cum laude) in 1998.
- He also has a Clinical Fellowship in Transplantation and Hepato-Pancreatic-Biliary Surgery from the Multiorgan Transplant Program and Department of Surgery, University Healthcare Network, Toronto General Hospital, Canada.
- Prof. Guba's main focus includes the surgical treatment of malignant tumors of the liver, biliary tract, and pancreas, thyroid, lung, and rectum.
- Other than his practice, he enjoys writing articles and book chapters for national and international journals.
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- Prof. Dr. med. Markus Guba is a General Surgeon specializing in Transplantation and Hepato-Pancreatic-Biliary Surgery with experience of more than 24 years.
- He is a member of the German Society For Surgery, European Society of Transplantation, and American Society of Transplant Surgeons.
- He studied medicine at the University of Regensburg and the Medical School Harare, Zimbabwe, and Eberhard-Karls University of Tübingen (summa cum laude) in 1998.
- He also has a Clinical Fellowship in Transplantation and Hepato-Pancreatic-Biliary Surgery from the Multiorgan Transplant Program and Department of Surgery, University Healthcare Network, Toronto General Hospital, Canada.
- Prof. Guba's main focus includes the surgical treatment of malignant tumors of the liver, biliary tract, and pancreas, thyroid, lung, and rectum.
- Other than his practice, he enjoys writing articles and book chapters for national and international journals.

Prof. Dr. Carl J Oldhaffer
General Surgeon
- Prof. Dr. Carl J Oldhaffer is a well-known General Surgeon with experience of more than 19 years.
- He is a member of the DGC German Society for Surgery, DGAV German Society for General and Visceral Surgery, and various scientific working groups.
- He has worked in a multitude of prestigious organizations and graduated from Germany Universities.
- Dr. Oldhaffer has a comprehensive practice in the field of operative gastric diseases, bariatric surgery, and also operations on the stomach, intestines, and gallbladder, while also treating abdominal and tumor diseases.
- He has a number of publications to his credit in various reputed national and international journals.
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- Prof. Dr. Carl J Oldhaffer is a well-known General Surgeon with experience of more than 19 years.
- He is a member of the DGC German Society for Surgery, DGAV German Society for General and Visceral Surgery, and various scientific working groups.
- He has worked in a multitude of prestigious organizations and graduated from Germany Universities.
- Dr. Oldhaffer has a comprehensive practice in the field of operative gastric diseases, bariatric surgery, and also operations on the stomach, intestines, and gallbladder, while also treating abdominal and tumor diseases.
- He has a number of publications to his credit in various reputed national and international journals.

Prof. Dr. med. Carolin Tonus
General Surgeon
- Prof. Dr. med. Carolin Tonus is a General & Visceral Surgeon with experience of more than 23 years.
- She is an active member of the German Society for Surgery, German Society for General and Visceral Surgery, Professional Association of German Surgeons (BDC), Surgical Working Group Oncology (CAO), International Society Of Intraoperative Radiation Therapy, International Colon and Rectal Cancer Club (ICRCC), and many more.
- She studied medicine at the Department of Human Medicine, Johann Wolfgang Goethe University, Frankfurt am Main in 1985, and received a Ph.D. ("Clinical Significance of the Ligamentum Teres Plastic in Gastroesophageal Reflux Disease") in 1991.
- She has interests in Diseases of the colon and rectum as well as the interdisciplinary therapy of colon cancer (including irradiation of advanced tumors on the open abdomen - IORT). Sarcoma Center.
- Dr. Tonus has received various awards such as the Teaching award for outstanding teaching at the Asklepios Campus Hamburg 2012, Teaching award for outstanding teaching at the Asklepios Campus Hamburg 2013, Asklepios Award 2015 (2nd prize in the innovation category), etc.
- She continues to serve in the field of general surgery while also writing publications and articles in prestigious journals.
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- Prof. Dr. med. Carolin Tonus is a General & Visceral Surgeon with experience of more than 23 years.
- She is an active member of the German Society for Surgery, German Society for General and Visceral Surgery, Professional Association of German Surgeons (BDC), Surgical Working Group Oncology (CAO), International Society Of Intraoperative Radiation Therapy, International Colon and Rectal Cancer Club (ICRCC), and many more.
- She studied medicine at the Department of Human Medicine, Johann Wolfgang Goethe University, Frankfurt am Main in 1985, and received a Ph.D. ("Clinical Significance of the Ligamentum Teres Plastic in Gastroesophageal Reflux Disease") in 1991.
- She has interests in Diseases of the colon and rectum as well as the interdisciplinary therapy of colon cancer (including irradiation of advanced tumors on the open abdomen - IORT). Sarcoma Center.
- Dr. Tonus has received various awards such as the Teaching award for outstanding teaching at the Asklepios Campus Hamburg 2012, Teaching award for outstanding teaching at the Asklepios Campus Hamburg 2013, Asklepios Award 2015 (2nd prize in the innovation category), etc.
- She continues to serve in the field of general surgery while also writing publications and articles in prestigious journals.

Prof. Dr. med. Marco Niedergethmann
General Surgeon
- Prof. Dr. med. Marco Niedergethmann is a General & Visceral Surgeon with experience of more than 22+ years in the field.
- He is a certified visceral surgeon from the German Society for General and Visceral Surgery for surgical diseases of the pancreas (since 2010), liver (since 2011), coloproctology (since 2013), and minimally invasive surgery (since 2019).
- He studied medicine in Marburg, Heidelberg/Mannheim, and San Francisco, USA, and received his license to practice medicine and doctorate in 1998.
- In 1998, he trained as a specialist in surgery, vascular surgery, and visceral surgery at the Surgical University Clinic Mannheim.
- Dr. Niedergethmann is specialized in procedures such as gastric sleeve resection, gastric band surgery, biliopancreatic diversion, revision surgeries, minimally invasive procedures, etc.
- He has more than 50 international journals and more than 100 domestic reports and papers on his medical field.
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- Prof. Dr. med. Marco Niedergethmann is a General & Visceral Surgeon with experience of more than 22+ years in the field.
- He is a certified visceral surgeon from the German Society for General and Visceral Surgery for surgical diseases of the pancreas (since 2010), liver (since 2011), coloproctology (since 2013), and minimally invasive surgery (since 2019).
- He studied medicine in Marburg, Heidelberg/Mannheim, and San Francisco, USA, and received his license to practice medicine and doctorate in 1998.
- In 1998, he trained as a specialist in surgery, vascular surgery, and visceral surgery at the Surgical University Clinic Mannheim.
- Dr. Niedergethmann is specialized in procedures such as gastric sleeve resection, gastric band surgery, biliopancreatic diversion, revision surgeries, minimally invasive procedures, etc.
- He has more than 50 international journals and more than 100 domestic reports and papers on his medical field.
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