Prof. Rafael Bruck is a highly experienced gastroenterologist and hepatologist with 40+ years of experience. He specializes in the treatment of acute and chronic diseases of the esophagus, stomach, small and large intestines, pancreas, gastrointestinal cancer, and biliary duct and liver abnormalities. He is a member of several medical organizations, including the American Medical Association.
Read moreDr. Erwin Santo is an Israeli top rated gastroenterologist, an expert in the diagnosis and treatment of gastric and liver diseases. He has extensive experience in the field, including heading the Gastroenterological Department at Sourasky Medical Center and being a co-founder of the European Society of Gastrointestinal Endoscopy. He is a member of the American Gastroenterological Association, the Israeli Association of Gastroenterology, and the European Association of Gastroenterology, Endoscopy and Nutrition.
Read moreDr. Specialist Surgeon Rafail Ibayev is an expert in advanced gastrointestinal surgery. He specializes in both laparoscopic and open procedures for diseases of the stomach, intestine, and rectum. Dr. Ibayev is a recognized leader in obesity and metabolic surgery. He has extensive experience in sleeve gastrectomy, gastric bypass, and gastric balloon procedures. His patients achieve high success rates in weight management and metabolic health.
Dr. Ibayev is known for his work in minimally invasive surgery. He performs a wide range of laparoscopic operations that help patients recover faster and with less scarring. He is also skilled in endocrine and breast surgery, including advanced oncoplastic techniques for both benign and malignant conditions. As a gastrointestinal cancer specialist, he performs complex surgeries for liver, stomach, and colorectal tumors. He provides modern and effective oncological care.
Dr. Ibayev is highly trained in anti-reflux surgery, treatment of digestive disorders, endoscopic procedures, hernia repair, splenectomy, and proctologic surgeries. He is committed to patient-centered care and long-term health outcomes.
Read moreDr. Victor Alexander Krol - Chief of Gastroenterology, Internal Medicine and Obesity Treatment Center at Martinus Hospital
Dr. Victor Alexander Krol is a highly qualified specialist, heading the departments of gastroenterology and internal medicine. With many years of experience and deep knowledge in his field, Dr. Krol has established himself as an outstanding expert, providing patients with comprehensive treatment and an individual approach. He actively uses the latest methods of diagnosis and treatment of diseases of the gastrointestinal tract, metabolism, as well as diseases of the cardiovascular and respiratory systems.
Dr. Krol is also the director of the certified Obesity Treatment Center at Martinus Hospital, which provides surgical and endoscopic treatments for obesity. The center uses advanced technology to diagnose and treat obesity (adiposis), including methods such as bariatric surgery, endoscopic weight loss, and specialized programs for patients with different stages of obesity. The center is certified to high standards and has excellent results in the treatment of this serious disease.
The Gastroenterology Department, headed by Dr. Krol, diagnoses and treats diseases of the stomach, intestines, liver, pancreas, and gallbladder. The doctors of the department use a wide range of methods, including endoscopic procedures, ultrasound, and other modern diagnostic technologies.
The Department of Internal Medicine covers a wide range of diseases, including cardiology, diabetology, infectology, and therapy of respiratory and renal diseases. Dr. Krol and his team provide a comprehensive approach to treatment using the most advanced methods of medicine.
Thanks to his high professionalism and humane approach to each patient, Dr. Krol deservedly enjoys the respect of colleagues and patients.
Read moreAssoc. Dr. Gokmen Ozturk is a General Surgery Specialist with 25 years of experience. He graduated from Bursa Uludag University Faculty of Medicine in 1994. He completed his surgical training at Okmeydanı Training and Research Hospital. Dr. Ozturk has also served as Deputy Chief Physician at Trabzon Fatih Regional Hospital.
Dr. Ozturk treats complex surgical cases, including bowel and colorectal cancer, breast cancer, liver metastasis, thyroid diseases, and obesity. He is skilled in minimally invasive and advanced surgical techniques. His approach helps improve patient outcomes and recovery. Dr. Ozturk currently works at Medipol University and Nisa Hospital. He is known for maintaining high standards of care and patient satisfaction.
Read moreMembership in societies:
Expert of scientific journals
Close co-operation with leading surgeons
Membership of the German Medical Association
Specialities:
Introduction of new and modern techniques in the field of oncological surgery
General and visceral surgery
Minimally invasive surgery
Gastrointestinal oncology surgery
Oncological surgery
Haemorrhoids treatment
Additional clinical specialisation in minimally invasive and hernia surgery
Surgery and transplantation of the pancreas
Work Experience:
2005: Specialist in the field of surgery
2008: Appointed Senior Consultant specialising in pancreatic surgery and transplantation
2010: Coordinator of the Pancreatic Cancer Centre (Oncocert)
2013: Specialist in visceral surgery
2014: Managing Senior Physician, additional clinical specialisation in minimally invasive and hernia surgery
2019: Chief Surgeon of the Colorectal Cancer Centre Bochum (the first certified colorectal cancer centre in Germany and one of the first certified leading colorectal centres in Europe)
2021: Chief Surgeon of the Department of Surgery at the Academic Hospital Solingen
Thanks to the professor and his team, the department has been modernised by introducing modern surgical methods of treatment and especially improved methods of post-operative recovery. The Department of Surgery at the Solingen Clinic is now further expanding its focus on minimally invasive surgery in the direction of robotics. The clinic has allocated a huge budget for the purchase of state-of-the-art equipment in order to offer patients a full range of surgical methods for the treatment of benign and malignant diseases of the oesophagus, lungs, stomach, liver, pancreas and intestines according to current guidelines and using the most modern technical equipment.
Professor Schenker is an active researcher and lecturer. He lectures at medical universities and organises seminars and workshops for colleagues. He cooperates closely with the Cancer Centre, the Pancreatic Cancer Treatment Centre, the Intestinal Cancer Treatment Centre and the Interregional Trauma Centre.
Read moreDoctor: Kilis Merkez No. 1 Health Center, 2006-2008
Assistant Doctor: Mersin University Faculty of Medicine, 2009-2013
Specialist Doctor: Bingöl Genç State Hospital, 2013-2014
Minor Assistant: Akdeniz University Faculty of Medicine, 2014-2017
Minor Specialist: Erzurum Regional Training and Research Hospital, 2017-2018
Subspecialist: Gaziosmanpaşa Training and Research Hospital, 2018-2020
Attending Specialist: Başakşehir Çam and Sakura City Hospital, 2020-2022
Associate Professor: Başakşehir Çam and Sakura City Hospital, 2023
Associate Professor: Istinye University Medicalpark Gaziosmanpaşa Hospital, 2023-2024
Turkish Pediatric Society
Turkish Society for Pediatric Gastroenterology Hepatology and Nutrition
ESPGHAN - European Society for Pediatric Gastroenterology Hepatology and Nutrition.
1995 to 2001 | Ege University Faculty of Medicine – Medical Education
2001 to 2006 | Dokuz Eylül University Faculty of Medicine – Internal Medicine Specialization
2008 to 2011 | Göztepe Training and Research Hospital – Gastroenterology Subspecialty
2014 | Ümraniye Training and Research Hospital – Associate Professor of Gastroenterology
2021 | University of Health Sciences – Professor
2007 | Nusaybin State Hospital – Internal Medicine Specialist (Civil Service Obligation)
2011 to 2014 | Ümraniye Training and Research Hospital – Gastroenterology Specialist
2014 to 2017 | Ümraniye Training and Research Hospital – Associate Professor of Gastroenterology
2017 to 2021 | Health Sciences University – Associate Professor of Gastroenterology
2015 to 2021 | Ümraniye Training and Research Hospital Gastroenterology Clinic – Clinic Chief
2021 to 2022 | University of Health Sciences – Professor of Internal Medicine and Gastroenterology
2015 to 2022 | Genomic Laboratory (GLAB) Coordinator, Istanbul Provincial Health Directorate
2014 to 2021 | Northern Clinics of Istanbul Journal (indexed in WoS and PubMed) – Founding Editor
2021 to Present | Turkish Liver Research Association – Board Member
2022 to Present | Hepatology Bulletin Journal – Editor
2019 to Present | Hepatology Forum Magazine – Editor
2016 to Present | World Journal of Hepatology – Editor
1999 | Trainee Doctor, Regional Infectious Diseases Unit, Western General Hospital, Edinburgh, UK
2000 | Trainee Doctor, Cardiology Unit, North Manchester General Hospital, Manchester, UK
2005 | Assistant Doctor, Regional Infectious Diseases Unit, Western General Hospital, Edinburgh, UK
Turkish Gastroenterology Association
Turkish Liver Research Association
EASL – European Association for the Study of Liver
APASL – Asian Pacific Association for the Study of Liver
AAAS – American Association for the Advancement of Science
2013 | Liver Fibrosis Pathways in Chronic Hepatitis B: A Comparative Proteomic Study – Gilead Fellowship Award
2014 | Liver Fibrosis Pathways in Chronic Hepatitis B: A Comparative Proteomic Study – Viral Hepatitis Fight Association Project Support Award
2014 | The Relationship between Spontaneous Seroconversion and Toll-Like Receptor Gene Polymorphism in Hepatitis B Infection – Turkish Gastroenterology Association, Best Poster Second Prize
2015 | Research on Damage Pathways in Liver Tissue in Chronic Hepatitis B: A Comparative Proteomic Study – Turkish Gastroenterology Association, Best Oral Presentation Third Prize
2016 | Investigations of the EGF and Its Receptor EGFR Gene Variants in Ulcerative Colitis – XV Euroasian Congress of Gastroenterology and Surgery, Best Oral Presentation Third Prize
Read moreEducation and Specialization
Experience
Read more
Undergraduate Faculty of Medicine Trakya University 1995-2001
Medical Residency Internal Medicine Uludağ University 2001-2006
Subspecialty Gastroenterology Medeniyet University, Göztepe Training and Research Hospital / Gastroenterology Clinic 2007-2011
Internal Diseases
Assistant doctor Uludağ University Faculty of Medicine
Internal Diseases USA 2001-2006
Internal Diseases Specialist Şanlı Urfa Mehmet Akif İnan
Training and Research Hospital 2007
(Jul-Dec)
Gastroenterology Minor
Assistant Istanbul Medeniyet Universityniversitesi
Göztepe Training and Research Hospital
Gastroenterology Clinic 2007-2011
Gastroenterology Specialist Sivas Numune Hospital 2011-2013
Gastroenterology
Chief Resident Health Sciences University
Ümraniye Training and Research Hospital 2013-2017
Assoc. Dr.
Chief Assistant of Gastroenterology Clinic University of Health Sciences
Ümraniye Training and Research Hospital
2017-2021
Assoc. Dr.
Gastroenterology Clinic Administrative Responsible University of Health Sciences
Ümraniye Training and Research Hospital
2021-2024
Turkish Society of Gastroenterology
Turkish Association of Liver Research
Gastrointestinal Endoscopy Society
Third Prize for Oral Presentation, 32nd National Gastroenterology Week, Turkish Gastroenterology Association, November 25-29, 2015. Turkish J. Gastroenterol 2015;26(suppl 1): Oral Presentation 03, S:11
Oral Presentation Third Prize. XVth Eurasian Congress of Gastroenterology and Surgery, 27 apr-01 May 2016, Antalya P:89
Read more
Education
-1993 Uludag University, Bursa School of Medicine
-2007 Haydapasa Numune Hospital General Surgery Residency
Experience
Memberships
• Turkish Medical Association
• Turkish Society for Colon and Rectal Surgery
• International Federation for Obesity Surgery
• Mediterranean Societo of Coloproctology
Publications
Gastroenterology
Pendik Medipol University Hospital
1999 Karadeniz Technical University, Gastroenterology
1997 Atatürk University, Internal Diseases Professorship
1992 Atatürk University, Internal Diseases Associated Professorship
1985 Atatürk University, Internal Diseases Specialist
1981 Atatürk University Faculty of Medicine
1- Nihat Okçu Gülçin Polat, Arif Yılmaz, Mehmet Koruk, The demographic features of gastric cancers in Erzurum(Eurasian J Med 2000; 32: 63-65)
2- An Evaluation of Upper Gastrointestinal Bleeding Cases. Clinical Sciences-Doctor.2000, - E.akarsu,N.Okçu,et Ark.Northeast Anatolia 6:4:435-438
3-N.Okçu, A.yılmaz. İ.kiki,MDonuk, C.gündoğdu, H.uzunismail. Our Diagnostic Upper Gastrointestinal Endoscopy Results. Atatürk University Medical Journal 1997,29 (2):486
4-N. Okçu, M.gündoğdu, MD onuk, İ.kiki, l.cerrahoğlu, k.yılmaz, I. çapoğlu. The Role of Misoprostol in Preventing Gastroduodenal Lesions in Patients Using Nonsteroidal Anti-Inflammatory Drugs (NSAIDs). Atatürk University Medical Journal 1997,29 (2):453-455.
5-N.Okçu, A. Öz, MD Onuk, E.Akarsu, B. Tekin, Hz Tonbul, H.Kaya. Plasma Fibronectin Levels in Chronic Active Hepatitis and Decoction of Liver Parenchymal Insufficiency and Their Relationship with Liver Functional Status. Turkish J. Gastroenterol 1995;27(4): 422-426.
6-N.Okçu, Tahir Buran, MD Onuk, A. Yılmaz, E.Akarsu, G. Akçay. Prevalence of Helicobacter Pylori in Patients with Duodenal Ulcer in Erzurum and Surrounding Area. Turkish J. Gastroenterol 1995;27(4): 447-450.
7-N.Okçu, bs awake, e. akarsu, e. bakan, z. tonbul. Importance of Carbohydrate Antigens (CA-19-9, CA-125), Carcinoembryonic Antigen (CEA) and Alkaline Phosphatase in Gastric and Colorectal Cancers. Turkish J. Gastroenterol 1995;6:467-471.
8-N. Okçu, MD Onuk, E. Akarsu, H. Doğan, C. Gündoğdu. Major Risk Factors in Patients with Hepatocellular Carcinoma in Our Region. Gastroenterology 1994;5(2):154-157
9-N.Okçu, md. Onuk, e. akarsu, h. doğan, c.gündoğdu, tahir buran. Frequency of gastric carcinoma in Erzurum region, endoscopic and histological features. Gastroenterology 1994;5(2):263-267.
10-N. Okçu, MD Onuk, Tahir Buran, E. Akarsu, MA Çiftçioğlu. Frequency of Helicobacter Pylori in Nonspecific Gastritis Cases in Erzurum Province. Gastroenterology 1994;5(2):211-213.
11-N.Okçu, MD Onuk, Ö. Ünal, E. Akarsu, L. İncesu, K. Akgöz. Diagnostic Value of Ultrasound-Guided Fine Needle Aspiration Biopsy in Intra-Abdominal Mass Lesions. Gastroenterology 1993;4(1):166-68.
12-NOkçu, md. onuk, m. polat, a. yılmaz, m. gündoğdu, m. paç. Budd-Chiari Syndrome (2 Cases). Turkish J Gastroenterhepatol 1993; 4(1):77-80.
13-N.Okçu, H. Koçak, MD Onuk, M. Gündoğdu, E. Bakan, A. Yılmaz, A. Başoğlu, A. Ateş, F.A. Paç. The Effect of Atrial Pressure Changes and Cardiac Nerves on Plasma Atrial Natriuretic Peptide (ANP) Levels. Vascular Surgery 1993; 27(2): 128-132
15-N.Okçu, MD Onuk, A.Yılmaz, M. Gündoğdu, T. Buran. Effects of Omeprozole and Ranitidine on Peptic Ulcer Healing. Doğa-Tr.J. of Medical Sciences 1992;16:657-658.
16-N. Okçu, Mr. Yiğitoğlu, B. Adam, E. Bakan. The Effect of Digixin on Plasma Atrial Natriuretic Peptic Level in Patients with Congestive Heart Failure. S.Ü. Medical Faculty Journal 1991;7(2):243-247..
17-N.Okçu, A. Yılmaz. The Effect of Histamine H2 -Receptor Antagonists in Upper Gastrointestinal System Bleeding. Endoscopy Journal 1991;2(4):17-23.
18-N.Okçu, E. Bakan, B. Adam, A. Yılmaz, Mr. Yiğitoğlu. Sex Hormones and Sex Hormone Binding Globulin Levels in Patients with Chronic Hepatitis and Liver Cirrhosis (Letter to the Editor). Nature-Tr. J. Of Medical Sciences 1991;15:1-2.
19-N.Okcu Ömer Yılmaz.Helıcobacter pylori and related gastrointestinal system diseases. Turkish Clinics JMed Sci. 2013;33(3):806-13
20-Nihat Okçu, Ömer Yılmaz, Hakan Dursun, Gülçin Polat. The relationship between dyspeptic symptoms, nutritional habits, endoscopic and histological findings (Eurasian J Med 2006; 38: 13-17)
21-Mehmet Bilici,1Nihat Okcu,1Kerim Cayir,1Ibrahim Pirim,2Salim B. Tekin,1andCemal Gundogdu3 - Distribution of HLA Tissue Groups in Patients with Gastric Cancer Eurasian J Med. 2010 Apr; 42(1): 9.11.
22-Nihat Okcu,Abdulhalim Bak,Mehmet Sari,Mehmet Arslan,Sait Kapicioglu:The fibroblast proliferation, relationship of hepatocyte growth factor (HGF) and interferon-A2A Gastroenterology April 2000Volume 118,Issue 4, Part 2, PageA1404
23-Kubra Kaynar,Sait Kapicioglu,Mehmet Sari,Nihat Okcu,Abdulhalim Baki. The effect of fish oil on stress ulcer prophylaxis GastroenterologyVolume 118, Issue 4, Part 2, PageA1255
Read more1976-1988 PROFESSIONAL: SCHOOL FACULTY OF MEDICINE
AUTONOMOUS UNIVERSITY OF NEW LEON
PROFESSIONAL CERTIFICATE: 1592528
1988-1989 SOCIAL SERVICE: FRANCISCO VILLA URBAN HEALTH CENTER.
STATE OF NEW LEON
1990-1994 POSTGRADUATE GENERAL SURGERY: HOSPITAL JOSE A. MUGUERZA SA DE CV
RECOGNITION OF OFFICIAL VALIDITY GRANTED BY THE UNIVERSITY OF
MONTERREY
FROM THE STATE OF NUEVO LEON
AVE. I. MONTES PRIETO 4500 PTE. CP 66238 SAN PEDRO GARZA NUEVO LEON
1991-1994 LAPAROSCOPIC SURGERY: HOSPITAL JOSE A. MUGUERZA SA DE CV
HIDALGO PTE. 2525 CP 6406 MTY NUEVO LEON
SPECIALTY ID: 3278462
2005-2006 AESTHETIC MEDICINE AND ANTI-AGING
IMMAE GUADLAJARA JALISCO AUTONOMOUS UNIVERSITY OF GUADALAJARA
IV.- OTHER STUDIES
MARCH1991 “PHYSIOLOGY OF THE HEART”
MUGUERZA SA HOSPITAL
MARCH 1992 “GENERALITIES OF THE DIGESTIVE SYSTEM”
MUGUERZA SA HOSPITAL
MARCH 1992 “ADVANCED CARDIO-PULMONARY RESUSCITATION”
MUGUERZA SA HOSPITAL
MARCH1992 INTERNATIONAL COURSE ON GENERAL SURGERY “COMPLICATIONS
“POST-OPERATIVES”
CINTERMEX MONTERREY FOUNDRY PARK NUEVO LEON
SEPTEMBER 1992 “BASICAL TECHNIQUES FOR THORACIC TRAUMA SURGERY”
“ABDOMINAL AND VASCULAR”
PAN AMERICAN TRAUMA SOCIETY
MAY 1993 SPEAKER: CONGRESS 700 CASES OF CHOLECYSTECTOMY BY
LAPAROSCOPY
II NATIONAL CONGRESS OF LAPAROSCOPIC SURGERY IXTAPA GUERRERO
MAY 1994 CERTIFIED BY THE GENERAL SURGERY COUNCIL.
MEDICAL SPECIALISTS HOSPITAL No. 25 IMSS MONTERREY NUEVO LEON
OCTOBER 1997 SPEAKER “FIRST REGIONAL COURSE ON LAPAROSCOPIC SURGERY”
PIEDRAS NEGRAS MEDICAL COLLEGE COAHUILA
JANUARY-MARCH 2006 SPEAKER “INTRAHOSPITAL AND EMERGENCY MANAGEMENT OF
“CRITICAL PATIENT” PIEDRAS NEGRAS SPECIALIST CLINIC COAHUILA
AUGUST-SEPTEMBER 2006 COURSE “ANTI-AGING AESTHETIC MEDICINE”
INSTITUTE OF AESTHETIC AND ANTI-AGING MEDICINE GUADALAJARA JALISCO
V.- WORK AREA
1994-1995 COAHUILA STATE TEACHING HOSPITAL
GENERAL SURGEON.
1994-2022 CLINIC SPECIALISTS SA
GENERAL SURGEON.
1996-2022 ISSSTE PIEDRAS NEGRAS HOSPITAL CLINIC COAHUILA
GENERAL SURGEON
Read more