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
Experience:
2022 -
Medipol Bahçelievler
2021 - 2022
MEDIPOL UNIVERSITY SEFAKÖY HOSPITAL
2018 - 2020
İSTİNYE UNIVERSITY FACULTY OF MEDICINE
2014 - 2020
TOKAT STATE HOSPITAL
2010 - 2010
BINGOL STATE HOSPITAL
Education:
2021
MEDIPOL UNIVERSITY, GASTROTEROLOGY
2018
İSTINYE UNIVERSITY, INTERNAL DISEASES USA
2014
ANKARA TRAINING AND RESEARCH HOSPITAL, GASTROENTEROLOGY
2010
FIRAT UNIVERSITY, FACULTY OF MEDICINE/INTERNAL MEDICAL SCIENCES DEPARTMENT/INTERNAL MEDICINE DEPARTMENT
2004
FIRAT UNIVERSITY, FACULTY OF MEDICINE
A. International Peer-Reviewed Journal Articles:
Title: Fatal fulminant hepatitis B after withdrawal of entecavir treatment in a patient with HBeAg seroconversion.
Title: Acute gastric obstruction resulting from gallstone-induced bezoar.
Title: Garlic-induced esophagitis.
Title: Association between Helicobacter pylori and liver-to-spleen ratio.
Title: Crohn's disease masked by median arcuate ligament syndrome.
Title: Telaprevir and anemia: What we learned from the first three patients.
Title: Magnesium and parathyroid hormone levels of patients using different proton pump inhibitors.
Title: Is topical pharyngeal anesthesia necessary in esophagogastroduodenoscopy in all unsedated patients?
Title: Inpatient Care Of Hepatitis C: Applying The Four Pillars Model To The Hospital Setting.
Title: "The "Bouveret's Syndrome" Case Resolved Without Necrotic Changes."
Title: Severe acute pancreatitis due to hypertriglyceridemia.
Title: Gallstone Ileus Caused by Cholecystoenteric Fistula Demonstrated on Computed Tomography.
Title: Intestinal Perforation Due to Ingested Chicken Bone Mimicking Crohn's Disease.
Title: Acute pancreatitis induced by hypertriglyceridemia: A case-based review.
Title: An Unusual Complication of Endoscopic Retrograde Cholangiopancreatography: Severe Acute Pancreatitis Leading to Death.
Title: A Rare Cause of Abdominal Pain: Mesenteric Panniculitis.
B. Contributions to Scientific Conferences:
Title: Suicidal poisonings in Turkey: demographic and clinical aspects.
Title: A Rare Cause of Gastrointestinal Bleeding: Aortoenteric Fistula.
2016 - Present, Istanbul/Istanbul/Türkiye
MEMORIAL SISLI HOSPITAL
Gastroenterology Specialist
2012 - 2016, Istanbul/Istanbul/Türkiye
BEZMIALEM FOUNDATION UNIVERSITY
Gastroenterology Specialist, Lecturer
2010 - 2012, Diyarbakir/Diyarbakir/Türkiye
DIYARBAKIR TRAINING AND RESEARCH HOSPITAL
Gastroenterology Specialist
2009 - 2010, Istanbul/Istanbul/Türkiye
HASEKİ TRAINING AND RESEARCH HOSPITAL
Gastroenterology Specialist
1996 - 2006, Istanbul/Istanbul/Türkiye
HASEKİ TRAINING AND RESEARCH HOSPITAL
Internal Medicine Specialist
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2022 - Present, Istanbul/Türkiye
MEMORIAL SISLI HOSPITAL
Professor of Gastroenterology
2021 - 2022, Istanbul/Türkiye
MEDICANA ATAŞEHİR INTERNATIONAL HOSPITAL
Professor of Gastroenterology
2019 - 2020, /USA
CLEVELAND CLINIC FLORIDA, UNITED STATES, DEPARTMENT OF ADVANCED ENDOSCOPIC APPLICATIONS
Invited Lecturer
2018 - 2021, Istanbul/Türkiye
ISTANBUL CIVILIZATION UNIVERSITY GASTROENTEROLOGY DEPARTMENT
Professor of Gastroenterology
2016 - 2019, Ankara/Türkiye
PRESIDENTIAL HEALTH COORDINATORATE
2016 - 2016, Istanbul/Türkiye
BEZMIALEM FOUNDATION GUREBA HOSPITAL, GASTROENTEROLOGY DEPARTMENT
2015 - 2016, /USA
CLEVELAND CLINIC FLORIDA, UNITED STATES, DEPARTMENT OF ADVANCED ENDOSCOPIC APPLICATIONS
2014 - 2014, Istanbul/Türkiye
SISLI FLORANCE NIGHTINGALE LIVER TRANSPLANTATION UNIT
2013 - 2018, Istanbul/Türkiye
ISTANBUL CIVILIZATION UNIVERSITY GASTROENTEROLOGY DEPARTMENT
Associate Professor of Gastroenterology
2021 - Present, Istanbul/Türkiye
MEMORIAL BAHCELIEVLER HOSPITAL
INTERNAL DISEASES AND GASTROENTROLOGY SPECIALIST
2014 - 2021, Gaziantep/Türkiye
GAZİANTEP UNIVERSITY FACULTY OF MEDICINE INTERNAL DISEASES DEPARTMENT/GASTROENTEROLOGY DEPARTMENT LECTURER
2012 - 2014, Gaziantep/Türkiye
GAZİANTEP ŞEHİT KAMİL STATE HOSPITAL GASTROENTEROLOGY DEPARTMENT (COMPULSORY SERVICE)
EXPERIENCE*
2019 - Present, Istanbul/Istanbul/Turkey
MEMORIAL ATAŞEHİR HOSPITAL
General Surgeon
2012 - 2019, Diyarbakır/Diyarbakır/Turkey
DİCLE UNIVERSITY FACULTY OF MEDICINE
General Surgeon
2011 - 2012, Van/Van/Turkey
VAN REGIONAL TRAINING AND RESEARCH HOSPITAL
General Surgeon
2009 - 2011, Van/Van/Turkey
HAKKARİ STATE HOSPITAL
General Surgeon
2004 - 2009, Van/Van/Turkey
YÜZÜNCÜYIL UNIVERSITY FACULTY OF MEDICINE
General Surgeon
2002 - 2004, Van/Van/Turkey
HACIBEKİR HEALTH CENTER
General Practitioner
*EDUCATION*
2018 - 2019, Diyarbakır/Turkey
Associate Professor
2015, Ohio/USA
OHIO STATE UNIVERSITY WEXNER MEDICAL CENTER
Neck Dissection Training
2012 - 2018, Diyarbakır/Turkey
Assistant Professor
1996 - 2002, Adana/Turkey
ÇUKUROVA UNIVERSITY
FACULTY OF MEDICINE - Medical Doctor Education
Born in Trabzon in 1972, Dr. İzzettin Kahraman began his medical studies at Karadeniz Technical University Faculty of Medicine in 1989 and earned his Medical Doctor degree in 1995. Following two years as a general practitioner, he embarked on his specialization training in 1997. He completed his residency at Ankara Oncology Training and Research Hospital, becoming a General Surgery Specialist in 2002.
Dr. Kahraman worked as a General Surgery Specialist in public hospitals, including Trabzon Numune Hospital and Bakırköy Dr. Sadi Konuk Training and Research Hospital, for 13 years. From 2016 to 2018, he served as a Lecturer at University of Health Sciences. In 2019, he transitioned to the private sector, continuing his career in private hospitals.
Throughout his career, Dr. Kahraman has engaged in a wide range of training programs both in Turkey and abroad. In 2007, he earned a Surgical Endoscopy Certificate and furthered his expertise in laparoscopic hernia treatments in Hamburg, Germany, in 2008. He also completed a course on Nutrition Practices and Training at Ondokuz Mayis University and a specialized course in laparoscopic hernia repair in Istanbul in 2010.
In 2011, after completing the "Emergency Surgery" course in Istanbul organized by the European Society for Trauma and Emergency Surgery (ESTES), Dr. Kahraman received training in SILS (Single Incision Laparoscopic Surgery) Cholecystectomy at Gazi University in Ankara. Since then, he has specialized in advanced laparoscopic techniques, with a particular focus on endoscopy, gastric diseases, obesity, and metabolic surgery.
In 2021, Dr. Kahraman obtained certificates in Ozone Therapy and Mesotherapy from Medipol University.
Since 2023, he has been serving at Estexper Clinic, Istanbul.
Education:
Specialized Education and Experience:
Academic Career:
Medical Interests and Activities
Hepatic Cirrhosis and Portal Hypertension
Hepatic Cancer
Viral Hepatitides (Chronic Hepatitis B, C and Delta Infections)
Alcoholic Chronic Liver Disease
Non-Alcoholic Fatty Liver Disease
Stomach and Duodenal Ulcer
Gastrointestinal Hemorrhage (Ulcer and Varicose Vein Bleeding)
Functional Digestive System Disorders (Irritable Bowel Syndrome, Functional Intestinal Obstruction and Diarrhea...)
Inflammatory Bowel Diseases (Ulcerative Colitis, Crohn’s Disease)
Malabsorption Syndromes (Celiac Disease and Alike)
Gastrointestinal Tract Malignancies
Education and Experience
Liv Hospital, Ulus, Gastroenterohepatology Department (2013 ...)
Associate Professor of Medicine, Obligatory Service at Gastroenterology, Şanlıurfa Training and Research Hospital (2010-2012)
Subspecialty in Gastroenterohepatology, Department of Gastroenterohepatology, İstanbul Faculty of Medicine, İstanbul University (2004-2010)
Research Fellow, Physician, Department of Internal Diseases,
İstanbul Faculty of Medicine, İstanbul University (1992 - 1998)
Memberships
Turkish Association For The Study of The Liver
Turkish Society of Gastroenterology
Inflammatory Bowel Disease Society
Internal Diseases Specialty Association
Specializations
Diabetes (Sugar)
Thyroid
Hypertension
cholesterol
stomach diseases
intestinal diseases
osteoporosis
Experience
Azerbaijan Gusar Central Hospital
Vreden Russian Research Institute of Traumatology and Orthopedics
Azerbaijan Göranboy, First Lieutenant Doctor
Hospital Park Darıca Hospital
BAH
Education
Azerbaijan Medical Faculty (2015)
Kocaeli Derince Training and Research Hospital (2016-2020)
Vocational Trainings, Courses and Conferences Attended
Internal Medicine Congress
Gastro Academy
Specializations
Cancer Surgery
Pancreatic Surgery
Bile Duct Surgery
Bariatric Metabolic Surgery
Oncological Surgery
Breast Surgery
Gastric cancer
Colon cancer
Thyroid Cancer
Obesity Surgery
Diabetes Surgeries