Gastric Ulcer Doctors Worldwide

Prof. Dr. İbrahim Doğan is a gastroenterologist. He earned his MD from Ankara University Faculty of Medicine in 1991. He became an Internal Medicine specialist at Gazi University in 1996. He completed gastroenterology subspecialty training at İnönü University in 2001.

His academic career was at Gazi University. He served as Lecturer (2002), Assistant Professor (2003), Associate Professor (2007), and Professor (2012). He worked as a researcher at the University of California San Diego from 2004 to 2006. He has practiced at Koru Hospital since January 2023.

Clinical focus includes gastroesophageal reflux, irritable bowel syndrome, constipation, gastroparesis, achalasia, bloating, gas and belching, fecal incontinence, ulcerative colitis, and Crohn’s disease. He performs ERCP, stent placement, balloon and bougie dilation, polypectomy, argon plasma coagulation, double-balloon enteroscopy, and bleeding control.

Prof. Dr. Musa Aydınlı is an internal medicine specialist and gastroenterologist. He completed his MD at Hacettepe University in 1997. He finished internal medicine training in 2003 and gastroenterology training in 2007 at the same institution. He worked at Kayseri Training and Research Hospital from 2007 to 2009. He served in the Gastroenterology Department at Gaziantep University from 2009 to 2014. He became an associate professor in 2012 and a professor in 2020. He joined Gülhane Training and Research Hospital in 2022. He now practices at Private Koru Ankara Hospital.

Clinical focus: GERD; dyspepsia, gastritis, and Helicobacter pylori; peptic ulcer disease; celiac disease; IBS and IBD (ulcerative colitis, Crohn’s disease); colon polyps; colorectal and upper GI cancers; liver disease (fatty liver, chronic hepatitis, cirrhosis, portal hypertension); hepatobiliary and pancreatic disorders and cancers. Procedures: EGD, rectosigmoidoscopy, and colonoscopy; biopsy, polypectomy, and endoscopic mucosal resection; hemostasis and APC; dilation and stent placement; PEG; ERCP; EUS-guided biopsy.

Specializes in gastroenterology with extensive experience in diagnosing and treating gastric ulcers at the National Cancer Institute.

• Graduated from Comenius University in Bratislava
• Member of the Oncology Section of the Slovak Gastroenterological Society
• Certified in Diagnostic and Interventional Esophagogastroduodenoscopy
• Performs endosonography and ERCP for pancreatic and bile duct diseases

Dr. Letkovsky specializes in advanced endoscopic diagnosis and treatment of digestive tract conditions at the National Cancer Institute.

• Board-certified gastroenterologist with a PhD in Internal Medicine
• Expert in endosonography and ERCP for pancreas and bile duct diseases
• Active member of multiple Slovak Gastroenterology Society sections
• Co-author of a national study on colonoscopy quality

Specialized in gastroenterology since 2021 – Daniela Osuská performs endoscopies and works at the National Cancer Institute.

• Member of the supervisory board of the Oncology Section of the Slovak Gastroenterological Society
• Trained endoscopic techniques and shares expertise internationally
• Over a decade of experience in internal medicine and gastroenterology

Head of the Gastroenterology Department at the National Cancer Institute – specializes in endoscopic diagnosis and treatment of gastrointestinal tumors.

• Graduated from Comenius University and specialized in gastroenterology
• Completed multiple specialized training courses abroad
• Chair of the Endoscopy Section of the Slovak Gastroenterological Society
• Published and presented at numerous professional conferences
• Trainer of advanced endoscopic techniques worldwide

Dr. Bahaeddin Tapkan is a gastroenterologist and gastrointestinal surgeon at Basari Hospital in Istanbul. He treats digestive system disorders such as gastric ulcers, gastritis, and pancreatitis. Dr. Tapkan performs laparoscopic anti-reflux surgery and gallbladder resections. He works at a facility holding ISO 9001:2015 quality management certification.

• Performs surgical removal of duodenal polyps and appendectomies.
• Practices at Basari Hospital, which holds a national health tourism authorization.
• Consults with patients online about gastrointestinal health.
• Treats patients in a 100-bed facility licensed by the Turkish Ministry of Health.

Dr. Saygili Ozlem is a gastroenterologist at Medicana Sivas Hospital in Turkey. She treats digestive conditions including Crohn's disease, ulcerative colitis, and cirrhosis. Dr. Ozlem performs procedures such as gastric and duodenal polyp removals. She works at Medicana Sivas, a facility that treats over 113,000 patients annually.

• Treats chronic gastritis and pancreatitis.
• Performs endoscopic removal of gastrointestinal tract polyps.
• Manages gastric ulcers and cholelithiasis.
• Practices at a hospital with 219 beds and 86 medical specialists.

Dr. Valame presented his research on stomach cancer at the elite Gastrointestinal Cancer Symposium by ASCO in San Francisco.

• Completed MD in Internal Medicine from Shyam Shah Medical College
• Specialized in Medical Oncology at Indraprastha Apollo Hospital
• Delivered lectures at International Winter School of Oncology at AIIMS, Bhopal
• Expert in targeted therapies for cancer

Dr. Sarikaya specializes in gastroenterology with a focus on gastric ulcers at Medipol Bahçelievler Hospital.

• Published multiple research papers on gastrointestinal conditions
• Trained at Medipol University in gastroenterology
• Experienced in both clinical and academic settings

Prof. Dr. Varocha Mahachai has of specialized expertise in gastroenterology, focusing on complex digestive conditions at Bangkok Hospital Pattaya.

• Board-certified with MD, MSc, FRCPC, and FACG credentials
• Fellowship-trained in Clinical Pharmacology at UCSF
• Specializes in GERD, IBS, IBD, and peptic ulcer disease
• Master's degree from University of Alberta in Canada

Prof. Dr. Adil Baykan brings 55 years of expertise in laparoscopic and endoscopic surgeries, specializing in complex gastrointestinal conditions at Medistate Hospital Istanbul.

• Specialized training in colorectal surgery at Mayo Clinic and University of Minnesota
• Extensive experience with minimally invasive techniques for gastric conditions
• Published author on digestive system cancers in international journals
• Former professor of general surgery at Ankara University

The doctor is a highly experienced specialist in the field of neurosurgery, with a focus on advanced surgical techniques for treating complex brain and spinal disorders. With over 15 years of clinical experience, the doctor has performed numerous successful surgeries, contributing significantly to the field through innovative approaches and patient-centered care.

Graduated from a prestigious medical school and completed rigorous residency and fellowship programs. The doctor is board-certified and has published extensively in peer-reviewed journals, sharing insights and advancements in neurosurgical procedures.

Dr. Gurhan Sisman is a gastroenterologist at Acibadem Altunizade Clinic in Istanbul. He treats digestive conditions including chronic pancreatitis, Crohn’s disease, and Barrett's esophagus. He works at a JCI-accredited facility.

• Treats inflammatory bowel diseases such as ulcerative colitis.
• Manages liver cirrhosis and gastrointestinal tract polyps.
• Treats gallstones and chronic gastric ulcers.
• Works at a clinic holding ISO and LEED Platinum certifications.