Gregory Tsiotos

Gregory Tsiotos

From the start of my residency at Mayo Clinic (1990-1995), I developed a great interest in liver, pancreatic, and GI surgery. In 1995, I was one of the four surgeons in the United States to be accepted to practice this subspecialty at Mayo Clinic (July 1995-December 1997). (Note: No other surgeon in Greece currently holds a similar certification from a hospital equivalent to Mayo Clinic or any similar medical institution in the United States). In my role as an Assistant Professor of Surgery at the University of Missouri (March 1998-February 2000), I was responsible for organizing the GI surgery department. During this time, the number of operations related to the pancreas, esophagus, liver, and stomach increased fivefold. The department soon became a reference center. This development reflected the Clinic’s expertise and the potential of such a highly-specialized department.

It should be highlighted that private or academic hospitals in Greece do not yet have such highly specialized departments similar to the one at Mayo Clinic, as mentioned above. This lack of highly specialized departments is attributed to the worldwide shortage of qualified surgeons who are able of organize and run such departments, communicate with a small team of renowned GI surgeons, and maintain high professional standards. 

Education & Academic Titles

  • Assistant Professor of Surgery, University of Missouri, USA
  • Instructor in Surgery, Mayo Clinic, USA
  • Hepato-Pancreato-Biliary Surgery Fellowship, Mayo Clinic, USA
  • General Surgery Residency, Mayo Clinic, USA

Memberships - Editorial Board Membership 

  • Society for Surgery of the Alimentary Tract – SSAT (since 1996)
  • Pancreas Club (since 1996)
  • European Digestive Surgery – EDS (since 1997)
  • American Hepato-Pancreato-Biliary Association – AHPBA (since 1996)
  • Greek Society of Digestive Surgery (Founding Member, 2001)

Editorial Board Member:

  • Pancreatology
  • Hellenic Journal of Surgery
  • Digestive Surgery

AD-HOC REVIEWER for peer-reviewed international journals

  • Pancreatology
  • Surgery
  • Digestive Surgery
  • British Journal of Surgery
  • Hellenic Journal of Surgery
  • World Journal of Surgery

Work experience 

  • Director, Division of Upper GI Surgery, Truman Medical Center, University of Missouri, USA (January 1998 – March 2000)
  • Director, Division of Oncological & Laparoscopic Surgery, Metropolitan Hospital (May 2001 – May 2013)

Teaching experience:

  • Assistant Professor of Surgery, University of Missouri, USA (January 1998 – March 2000)
  • Instructor in Surgery, Mayo Clinic, USA (July 1997 – December 1998)

Clinical & research interests

Clinical interests:

  • Upper GI surgery
  • Pancreas
  • Liver
  • Laparoscopic surgery
  • Borderline resectable pancreatic cancer
  • Metastatic liver cancer
  • Portal vein resection
  • Surgical oncology

Research interests:

  • Borderline resectable pancreatic cancer
  • Portal vein resection
  • Necrotizing pancreatitis

Honors & Awards

  • «Nygaard Travel Award for Clinical Research” – Mayo Clinic, 1995
  • «Teacher of the Year» – Dept of Surgery, Univ. Of Missouri, 1999

Books

  • Tsiotos GG: Obstructive Jaundice: Preoperative Evaluation. In: The Practice of General Surgery, edited by K.I. Bland. W.B. Saunders, Philadelphia, 2002, pp: 764-770 (ISBN: 0-7216-8476-9)
  • Tsiotos GG, Sarr MG: Diagnosis of pancreatic cancer. In: Surgical Diseases of the Pancreas, edited by Howard JM, Idezuki I, Ihse I, Prinz RA. Williams & Wilkins, Media, PA, 1998, pp: 497-515
  • Sarr MG, Tsiotos GG: Necrosectomy for acute necrotizing pancreatitis. In: Mastery of Surgery (4th edition), edited by R.J. Baker and J.E. Fisher. Lippincott Williams & Wilkins, Philadelphia, PA, 2001, pp: 1281-1287
  • Chang C, Tsiotos GG: Laparoscopic Common Bile Duct Exploration. In: The Practice of General Surgery, edited by K.I. Bland. W.B. Saunders, Philadelphia, 2002, pp: 853-857 (ISBN: 0-7216-8476-9)
  • Tsiaoussis J, Tsiotos GG: Gastroenterostomy. In: Atlas of Upper Abdominal Surgery, Edited by P.A. Clavien, M.G. Sarr, Y. Fong. Springer-Verlag GmbH & Co. KG, Berlin Heidelberg 2007, pp: 221-226 (ISBN: 978-3-540-20004-8)
  • Tsiotos GG, Sarr MG: Necrotizing pancreatitis: Staged relaparotomy and open treatment. In: Acute Pancreatitis – Novel Concepts in Biology and Therapy, edited by M. Buchler, W. Uhl, H. Friess, P. Malfertheiner. Blackwell Science, London, 1999, pp: 459-463
  • Tsiotos GG, Sarr MG: Pancreatic necrosis: Surgical management and long-term outcome. In: The Pancreas, edited by J.D. Wig. Azad Offset Printers, Chandigarh, India, 2000, pp: 260-277
  • Tsiotos GG: Preoperative evaluation of the periampullary mass. In: Pancreatic Tumors: Achievements and Perspectives, edited by Ch. Dervenis. Georg Thieme Verlag, Stuttgart, 2000, pp: 80-99
  • Tsiotos GG: Natural history of Idiopathic Chronic Pancreatitis. In: Chronic Pancreatitis – Novel Concepts in Biology and Therapy, edited by M.W. Buchler, H. Friess, W. Uhl, P. Malfertheiner. Blackwell Science, Oxford, 2002, pp: 316-324
  • Tsiotos GG, Tsiaoussis J. Pancreatic and intestinal fistulas. In: Diseases of the Pancreas – Current Surgical Therapy. Edited by: H.G. Beger, S. Matsuno, J.L. Cameron. Springer.

Recent publications 

  • Sarr MG, Banks PA, Bollen TL, Dervenis C, Gooszen HG, Johnson CD, Tsiotos GG, Vege SS. The new revised classification of acute pancreatitis 2012. Surg Clin North Am. 2013 Jun; 93(3):549-62. 
  • Banks PA, Bollen TL, Dervenis C, Gooszen HG, Johnson CD, Sarr MG, Tsiotos GG, Vege SS. Classification of acute pancreatitis – 2012: revision of the Atlan-ta classification and definitions by international consensus. Gut. 2013 Jan; 62(1):102-11
  • Sakorafas GH, Tsiotos GG, Korkolis D, Smyrniotis V. Individuals at high-risk for pancreatic cancer development: Management options and the role of surgery. Surg Oncol. 2012 Jan 12.
  • Tsiotos GG, Farnell MB, Sarr MG: Are the results of pancreatectomy for pancreatic cancer really improving? World J Surg 1999; 23: 913-919.
  • Tsiotos GG, Barry MK, Johnson CD, Sarr MG: Pancreas regeneration after re-section: Does it occur in humans? Pancreas 1999; 19(3): 310-313.
  • Tsiotos GG, Schlinkert RT: Laparoscopic splenectomy for Immune Thrombo-cytopenic Purpura. Arch Surg 1997; 132: 642-646.
  • Tsiotos GG, Mullany CJ, Zietlow SP, van Heerden JA: Abdominal complications following cardiac surgery. Am J Surg 1994; 167:553-557.
  • Tsiotos GG, Farnell MB, Ilstrup D: Nonmeckelian jejunoilial diverticulosis. Surgery 1994; 116: 726-732.
  • Tsiotos GG, Nagorney DM, de Groen PC: Selective management of hepatic venous outflow obstruction. J Gastrointest Surg 1997; 1: 377-385.
  • Tsiotos GG, Luque-de Leon E, Soreide JA, Bannon MP, Zietlow SP, Baerga-Varela Y, Sarr MG: Management of necrotizing pancreatitis by repeated operative necrosectomy using the zipper technique. Am J Surg 1998; 175: 91-98
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pancBG

Hellenic Pancreas Institute

The Hellenic Pancreas Institute aims at promoting and spreading knowledge on pancreatic diseases and their successful treatment based on the latest developments. Our work focuses on three distinct but complementary pillars:

  1. The advancement of scientific knowledge on pancreatic diseases through research and studies that lead to developing the most effective treatments.
  2. Awareness raising among the public and primary care physicians on the importance of timely diagnosis and the treatment of pancreatic diseases based on the latest standards. 
  3. The collaboration with organizations in Greece and abroad to effectively promote the goals of the Hellenic Pancreas Institute.