Dr. 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.
Postgraduate: General Surgery Department, Marmara University – İstanbul Specialization Training, 2002-2007
University: Marmara University Faculty of Medicine – İstanbul, 1995-2002
Experience
Editorial Board Membership
Association Memberships
Prof. Dr. med. Ulrich Graven
Head of the Clinic of Hematology, Oncology and Gastroenterology
Head of a certified oncology center
Head of Clinical Research Department
Specialization:
Hematology, including stem cell transplantation
Abdominal oncology, especially colorectal and pancreatic cancer therapy
Metastasis therapy, including the use of off-label drugs
Membership in professional societies:
Professional Union of German Therapists
German Society for Internal Medicine
German Cancer Society
Abdominal Oncology Working Group
German Society of Hematology and Oncology
German Working Group on Bone Marrow and Hematopoietic Stem Cell Transplantation
German Society for Digestive and Metabolic Diseases
European Society for Medical Oncology
American Society of Clinical Oncology
American Association for Cancer Research
Activities in professional communities:
German Cancer Society:
Since 2013, speaker of the commission for certification of oncology centers
Since November 2007, member of the board
Since September 2022, Speaker of the Section of National Societies on Cancer Control
Chairman of the working group on abdominal oncology of the German Cancer Society, drafting clinical guidelines for the treatment of colorectal and pancreatic cancer.
Chairman of the Oncology Society of North Rhine-Westphalia.
Member of the Colorectal Cancer Clinical Guidelines Working Group, European Society for Medical Oncology.
Member of the Scientific Council, National Cancer Registry at the Robert Koch Institute.
Chairman of the Regional Cancer Registry of the State of North Rhine-Westphalia.
Leading expert for clinical research, German Research Foundation and Federal Ministry of Research and Technology.
Member of the Commission on the Use of Medicines for Therapy "Off-Label", Federal Institute of Medicines and Medical Devices.
Member of the committee for the development of clinical guidelines for colorectal cancer.
Member of the commission on the development of approaches to metastasis and the use of palliative therapy in clinical guidelines for colorectal cancer.
Reviewer of scientific journals such as Journal of Cancer Research and Clinical Oncology, Tumor Diagnostik und Therapie, Der Schmerz, BMC Pharmacology, Onkologie, Strahlentherapie und Onkologie, International Journal of Colorectal Disease, Annuals of Oncology, European Journal of Cancer.
Dr. Osman Aktas has been serving as a general surgeon at Ataşehir Avicenna Hospital since 2005. Born in Kayseri in 1960, he graduated with his medical degree from Ankara University in 1983. Following his graduation, he fulfilled his military service in medical units for two years. He completed his general surgery residency at GATA from 1986 to 1990. After specializing in general surgery, He held key positions as head of general surgery departments and chief physician in several prominent military hospitals, including Tatvan, Diyarbakır, Ankara, and Manisa.
Dr. Osman has had a special focus on endoscopic surgery since 1995. He received advanced training in laparoscopic surgery techniques in Germany and has successfully performed a wide range of laparoscopic procedures. His expertise extends to gallbladder surgery, abdominal wall and inguinal hernia repairs, appendicitis, reflux and stomach surgeries, as well as complex cases such as gastrointestinal tumors, intestinal obstructions, and various other intestinal diseases, all managed through minimally invasive methods.
In 2002, Dr. Osman transitioned to the private sector, where he broadened his practice to include modern treatments for anal diseases like hemorrhoids, fistulas, and fissures, utilizing advanced techniques such as laser therapy.
Dr. Osman is also recognized for his significant contributions to oncological surgery. He has a wealth of experience in the surgical treatment of various cancers, including breast and thyroid cancer, where he has implemented new treatment methods that reduce the risk of complications. His surgical expertise spans critical cancer surgeries, such as the Whipple procedure for pancreatic cancer, colorectal cancer resections, gastric cancer, and other complex malignancies. Additionally, his skills in metabolic surgery have led to lasting outcomes for patients suffering from obesity and diabetes, ensuring a better quality of life through sustained weight loss and reduced risk of diabetes.
With his vast experience and advanced skills in both laparoscopic and cancer surgeries, Dr. Osman remains at the forefront of surgical excellence, offering innovative and comprehensive care to all his patients.
Doctor: 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.
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
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Education and Specialization
Professional Memberships
• Turkish Medical Association
• Mediterranean Health Foundation
• Akdeniz University Development and Health Foundation
• Transplantation Organizations Coordination Association
• National Surgical Association
Education and Specialization
Experience
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