Member of SICOB - Italian Society of Obesity Surgery and ACOI - Association of Italian Hospital Surgeons
Dr Braun is a board-certified general surgeon with over 25 years of experience specializing in gastrointestinal surgery, particularly in the treatment of gastroesophageal reflux disease (GERD) through Fundoplication surgery. He has performed over 500 successful Nissen and Toupet Fundoplication procedures, with a focus on minimally invasive laparoscopic techniques. His expertise extends to diagnosing complex cases of GERD and offering comprehensive treatment plans to improve patient outcomes.
He has carried out his main training experiences in various international institutions and specialization courses in general and digestive system surgery, including a two-year training internship at Johns Hopkins University, Division of Hepatobiliary Pancreatic Surgery and numerous courses in Madrid, with Prof. E. Moreno Gonzales (Curso Internacional de Actualizaciòn en chirurgia General y del Aparato Digestivo) or in New Orleans (Medical Education at the 90th Annual Clinical Congress of the American College of Surgeons).
Dr. Braun has extensive expertise in the field of digestive surgery. He has focused on implementing advanced protocols and optimizing surgical techniques, while maintaining high standards of safety and patient care. He has collaborated with a multidisciplinary team to provide an integrated and personalized approach in the management of obese or digestive disorder patients, improving quality of life and reducing post-operative complications.
Prof. Deraco has dedicated his career to helping patients with complex cancers, particularly those affecting the peritoneum, a membrane in the abdomen. He began his medical career in 1989 at the Surgery and Experimental Oncology Departments of the Fondazione IRCCS, National Cancer Institute in Milan, Italy. Over the years, he has played a key role in advancing treatments for peritoneal surface malignancies (PSM). For more than a decade, he was the lead physician for the Peritoneal Surface Malignancies Program. Since 2017, he has served as the director of the Peritoneal Surface Malignancies Unit, where he continues to focus on providing cutting-edge care for his patients.
Prof. Deraco’s expertise is in specialized cancer treatments like Cytoreductive Surgery (CRS), Hyperthermic Intra-Peritoneal Chemotherapy (HIPEC), and Pressurized Intra-Peritoneal Aerosolized Chemotherapy (PIPAC). These techniques aim to remove cancer and deliver heated chemotherapy directly to the abdomen, giving patients with PSM new hope. He has successfully treated over 1,200 patients using these advanced methods.
In addition to his clinical work, Prof. Deraco is a professor at Milan University, where he teaches future surgeons about peritoneal surface malignancies. His teaching extends internationally, as he has mentored over 30 postdoctoral fellows from prestigious institutions worldwide.
Prof. Deraco’s educational background is extensive. He earned his medical degree from the University of Messina in 1987 with top honors, followed by a specialization in general surgery five years later. His training continued in Paris, where he specialized in oncology at the prestigious Paris Dauphine University. He further honed his skills through fellowships in world-renowned institutions such as the Gustave Roussy Institute in France, the Royal Marsden Hospital in the UK, and the Washington Cancer Institute in the USA.
Throughout his career, Prof. Deraco has remained actively involved in research and professional organizations. He has published over 250 scientific articles and 25 book chapters, contributing to the advancement of cancer treatment globally. He serves on the board of multiple scientific societies dedicated to cancer research, including the Peritoneal Surface Oncology International Group (PSOGI) and the Italian Society for Loco-Regional Cancer Therapy (SITILO).
Dr. Muhammed Zubeyr Üçüncü is an Associate Professor of Surgery and a specialist in General Surgery. He earned his medical degree from Istanbul University, Istanbul Medicine Faculty. He is known for his skills in acute biliary pancreatitis, endoscopy, trauma and emergency surgery, obesity, and breast health.
Dr. Üçüncü has published more than 15 peer-reviewed articles. His research covers breast cancer, gastrointestinal diseases, and surgical methods. He has presented his work at international congresses, including the SIS World Congress on Breast Healthcare and the European Congress of Trauma and Emergency Surgery.
He is certified in Advanced Trauma Life Support and Advanced Endoscopy. He is also a member of the International Federation for the Surgery of Obesity and Metabolic Disorders. Dr. Üçüncü has helped improve breast cancer prognosis and minimally invasive surgery in Turkey.
Dr. Abu Shamsiya Rami Nuamanovych is a specialist in general and laparoscopic surgery, oncology, and ultrasound diagnostics. He is a Candidate of Medical Sciences, an associate professor, and a doctor of the highest category. Dr. Nuamanovych is a member of the Ukrainian Association of Bariatric Surgeons and the World Organization of Bariatric Surgeons (IFSO).
He works as a WHO consultant on laparoscopic surgery. He is also President of the Association of Arab Doctors of Ukraine. Dr. Nuamanovych has performed thousands of surgeries, including hernia repairs, bariatric procedures, and cancer operations. His skills are recognized internationally. He speaks English and Arabic fluently.
20 top ranked Gastroenterology doctors in the world are represented on this page. The list includes only verified specialists known for their experience and high success rates.
The ranking is composed according to the Bookimed patient reviews and considers the rating of hospitals where doctors practice.
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Dr. 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.
Dr. Jaydeep Palep is a bariatric and upper GI surgeon with 17 years of experience. He specializes in minimally invasive and robotic weight loss surgeries. Dr. Palep is one of the first surgeons in India trained in Banded Bypass, Banded Sleeve Gastrectomy, and Mini Gastric Bypass. He has also received advanced training in Robotic GI Surgery in Italy and the USA.
Dr. Palep’s bariatric practice is certified as a Center of Excellence by the International Excellence Foundation (IEF). His practice has a morbidity rate of just 1%, which matches global standards. More than 90% of his diabetic patients stop using insulin and oral medications after surgery. He has published many articles in international journals and is invited to speak at conferences around the world.
Dr. Eda Tereh Akay is a general surgeon. She completed specialty training in general surgery and provides patient-centered care with modern techniques.
Her expertise includes gastrointestinal surgery (gallbladder, hernias, appendicitis, gastrointestinal tract disorders), endocrine surgery (thyroid, parathyroid, adrenal), breast surgery (benign and malignant), minimally invasive laparoscopic procedures, and emergency and trauma surgery. She is known for precise surgical skills and a strong focus on patient safety.
Dr. Erdal Otman is an ophthalmologist and eye surgeon with over 35 years of experience. He graduated from the Istanbul University Cerrahpaşa Faculty of Medicine in 1980. He completed his ophthalmology residency at the same institution in 1986.
His clinical expertise includes cataract surgery (phacoemulsification and advanced intraocular lens implantation). He provides medical and surgical care for glaucoma. He treats retinal and vitreous disorders such as retinal detachment, macular degeneration, and diabetic retinopathy. He manages corneal diseases and performs corneal surgery, including keratoconus care, corneal transplantation, and anterior segment procedures. He also offers refractive surgery, including laser correction for myopia, hyperopia, and astigmatism.
Dr. Murat Erol is a general dentist with over 20 years of clinical experience. He graduated from Ege University Faculty of Dentistry in 2002. He provides care in English.
He offers preventive care and restorative treatments, including aesthetic fillings, crowns, and bridges. He also performs root canal therapy. His aesthetic services include whitening, composite bonding, and smile design. He provides fixed and removable prosthetics. His plans focus on oral function and natural aesthetics. Each treatment is tailored to the patient.
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
Dr Erdem Gelegen is an ophthalmologist with over 20 years of experience in cataract, refractive, retinal, glaucoma, and corneal/anterior segment care. He performs phacoemulsification with premium intraocular lenses. He provides laser vision correction for myopia, hyperopia, and astigmatism. He treats diabetic retinopathy, age-related macular degeneration, retinal detachment, keratoconus, and anterior segment disorders, including corneal transplants.
He graduated from Istanbul University Cerrahpaşa Faculty of Medicine in 1999. He completed his ophthalmology residency at Okmeydanı Training and Research Hospital in 2004. He is known for precise microsurgery and the use of advanced ophthalmic technologies.
Dr. Ozlem Yogurtcu is a general surgeon with extensive experience. She graduated from Dokuz Eylul University Faculty of Medicine. She completed her general surgery residency at Haseki Training and Research Hospital, 1st Surgical Clinic. She is fluent in English.
Her practice includes gastrointestinal surgery (gallbladder disease, hernias, appendicitis, other gastrointestinal conditions). It also includes endocrine surgery (thyroid, parathyroid, adrenal) and breast surgery (benign and malignant conditions). She treats emergency and trauma cases. She performs minimally invasive laparoscopic procedures.
She is known for precise surgery and a patient-centered approach.
Prof. Filippini began his career in 1980 and has been teaching at the University of Chieti since the 1990s in the fields of General Surgery, Microsurgery, Reconstructive Surgery, Vascular Surgery, Orthopedics, and Gynecology. His primary focus is oncological surgery, particularly specializing in "The surgical treatment of locally advanced tumors and multi-organ resections." He has enriched his expertise by visiting prominent reference centers in the United States, including the Memorial Sloan Kettering Cancer Center in Manhattan, New York City. There, he delved into minimally invasive, laparoscopic, and microsurgical techniques under the guidance of esteemed mentors such as John Daly, Michele Gagner, and Murray Brennan. Additionally, in 2005, he further expanded his skills at the City of Hope Oncology Center in Los Angeles, focusing on robotic surgery in oncology.
In 1980, Prof. Filippini graduated in Medicine and Surgery from the G. D'Annunzio University of Chieti in Italy with honors, presenting an experimental thesis on lympho-venous anastomosis using microsurgical techniques. He completed his specialization in general surgery at the University of Pisa with distinction after five years. In 1990, he obtained another specialization in Plastic and Reconstructive Surgery from the University of Padua in Italy, where he maintained a stellar academic record.
Prof. Filippini has presented at numerous national and international conferences and authored over 100 scientific publications. Additionally, he has co-authored two monographs.
Dyt. Yaren Nur Güngör is a dietitian. She graduated from the Faculty of Nutrition and Dietetics. She provides evidence-based, personalized nutrition counseling in English. She designs tailored programs for health promotion, disease management, and weight control.
Her clinical focus includes diet plans for diabetes, heart disease, thyroid disorders, and other metabolic issues. She also guides weight loss and gain and improves body composition. She offers sports nutrition and nutrition care for children and teens. She provides preventive nutrition with lifestyle counseling. Her approach is patient-centered and motivating.