Kallimanis Georgios

Kallimanis Georgios Gastroenterologist

Director of 2nd Gastroenterology Department HYGEIA Hospital

Education & Academic Qualifications

  • Diplomate of Medical School, University of Athens
  • Doctor of Science, Medical School, University of Athens
  • Postdoctoral Education, Georgetown University Washington DC USA – NIDDK, NIH, Bethesda, Maryland, USA – Gastroenterology Department AMC, Amsterdam, The Nederlands – 3rd Internal Medicine Department, University of Athens
  • Diplomate European Board of Gastroenterology and Hepatology


Doctoral thesis

  • “The contribution of Endoscopic Ultrasonography in Diagnosis and Staging of Esophageal and Gastric Cancer” 1992

Fellowship in Societies, Membership in Journal Editorial Committees

  • Hellenic Gastroenterological Association

  • Greek Society for the Study of the Liver

  • International Gastrosurgical Club

  • Greek Ultrasound Association

  • American Society of Gastrointestinal Association

  • Greek Society of Gastrointestinal Oncology


Work Experience

  • Director B’ Gastroenterology Clinic, HYGEIA Hospital 

  • Fellow adjunct, 3rd Internal Medicine Clinic, University of Athens,1994-1995


Clinical & Research Interest

  • Diagnostic and Therapeutic Endoscopy 

  • Endoscopic Ultrasonography (FNA)

  • IBD diseases

  • IBS

  • GERD

  • Principal Investigator in two European Multicenter Studies, LEGACY & PYRAMID, for the study and treatment of Crohn’s Disease and Ulcerative Colitis


Honors & Awards

  • Medical Doctor (thesis) Medical School University of Athens,1992

  • Visiting Professor, Georgetown University, Washington D.C., USA, 1995

  • 1st Award in Annual Hellenic Gastroenterological Association for the Study of Upper GI Diseases by Endoscopic Ultrasonography, 1990

  • 1st Grant Scholarship of Hellenic Gastroenterological Association for advanced training στο Georgetown University Medical Center, 1992

  • 1st Award for Endoscopic Achievement βραβείο of American Society for Gastrointestinal Endoscopy (ASGE) with the title: “Three Dimentional Endoscopic Ultrasonography, 1993

  • 2nd Award of the presentation: “ Endoscopic ultrasound for staging esophageal cancer – with or without dilation – is clinically important and safe. Gastrointest Endosc 1994 – American Gastroenterology Annual Conference, New Orleans, 1994 

  • Award – Grant «young gastroenterologist» member of the organizing committee of the World Congress of Gastroenterology. Los Angeles, USA, 1994

  • Honorary of Distinction as Faculty Member, Postgraduate Course of Endoscopic Techniques (Georgetown University), 1994

  • Award Best Study, Hellenic Annual Congress of Gastroenterology: «Hmsh2 mutated MMR gene In Greek HNPCC», 2002 

  • Diploma European Board of Gastroenterology and Hepatology, 2014


Recent Publications

  • Tio TL, Kalllimanis G. Endosonography in perianorectal fistulas and abscesses. Endoscopy 1994; 26: 813-15.

  • Kalantzis N, Laoudi F, Kallimanis G, et al. The role of endoscopic ultrasonography in diagnosis of benign lesions of the upper GI tract. Europ J Surg Oncol. Oct;1995 (5):449-54.

  • Kallimanis G, Garra B, Krasner B, et al. The feasibility of three dimensional endoscopic ultrasonography. Gastrointest Endosc 1995 Mar;41(3):235-9.

  • Tio TL, Kallimanis G. Endosonography in assessing peri intestinal lymph nodes. Endoscopy 1994; 26: 776-79.

  • Kallimanis G Gupta PK, Al-Kawas FH, et al. Endoscopic ultrasound for staging esophageal cancer – with or without dilation – is clinically important and safe. Gastrointest Endosc 1995;41:540-6.

  • Chak A, Canto M, Gerdes H, Lightdale C, Hawes R, Wiersema M, Kallimanis G, et al. Prognosis of esophageal cancers preoperatively staged to be locally invasive (T4) by endoscopic ultrasound (EUS): A multicenter retrospective cohort study. Gastrointest Endosc December 1995 (Vol. 42, Issue 6, pages 501-506.

  • Kallimanis G, Tio TL, Fleischer DE, Benjamin SB. Three dimensional endosonography: A new technique of endoscopic ultrasound. Hellen J Gastroenterol 1994;7:217-23.

  • Tio TL, Sie LH, Kallimanis G, et al.Staging of ampullary and pancreatic carcinoma: Comparison between endosonography and surgery. Gastrointest Endosc. 1995 Dec;44:706-13.

  • Panico WH, Cavuto NJ, Kallimanis G, Nguyen C, Armstrong DM, et al. Functional evidence for the presence of nitric oxide synthase in the dorsal motor nucleus of the vagus. Gastroenterology 1995 Nov; 109(5):1484-91.

  • Catalano MF, Nguyen CC, VanDam J, Kallimanis G, Geenen JE, Hogan WJ, Tio LT. Endosonography (EUS) in the evaluation of suspected malignant biliary obstruction and negative imaging. A multi-center study. Gastrointest Endosc. April 1995; Vol 41, Issue 4:392-396.

  • Apessos A, Mihalatos M, Danielides J, Kalliamanis G, et al. hMSH2 is the most commonly mutated MMR gene in a cohort of Greek HNPCC patients. Br J Cancer 2005 Jan 31;92(2):396-404.