Ulcerative Colitis Doctors Worldwide

Dr. Letkovsky combines extensive research with advanced endoscopic techniques for ulcerative colitis at the National Cancer Institute.

• Specialized in gastroenterology with a PhD in Internal Medicine
• Performs high-precision endosonography and ERCP for digestive tract issues
• Active researcher co-authoring studies on colonoscopy quality
• Member of multiple Slovak Gastroenterology Society sections
• Holds latest certifications in advanced endoscopic procedures

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.

Dr. Natalya Shevchenko is a Gastroenterologist of the highest category with 28 years of experience, specializing in colitis and other gastrointestinal conditions.

• Graduated from Kharkiv National Medical University
• Offers personalized treatment plans based on detailed analysis
• Specializes in treating adults with complex gastrointestinal issues

Specialized gastroenterologist with expertise in ulcerative colitis – Dr. Osuská combines endoscopic skills with oncology-focused gastroenterology at the National Cancer Institute.

• Board-certified in gastroenterology since 2021
• Member of Slovak Gastroenterological Society's Oncology Section
• Trained endoscopic techniques and teaches others
• Publishes research on gastrointestinal conditions

Dr. Tsios conducts thorough health evaluations at Impuls Medical Center, ensuring personalized treatment plans for ulcerative colitis patients.

• Treats a wide range of digestive and systemic conditions
• Coordinates multidisciplinary consultations for comprehensive care
• Focuses on long-term health monitoring and patient education

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.

Prof. Dr. Varocha Mahachai brings of expertise in gastroenterology, with a special focus on inflammatory bowel diseases like ulcerative colitis at Bangkok Hospital Pattaya.

• MD from Chulalongkorn University, Thailand
• MSc from University of Alberta, Canada
• Postdoctoral Fellow in Clinical Pharmacology from UCSF
• Board-certified with FRCPC and FACG credentials

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.

Prof. Dr. Adil Baykan has specialized in colorectal surgery for 55 years, with advanced training in laparoscopic and endoscopic techniques for ulcerative colitis.

• Completed colorectal surgery practice at Mayo Clinic and University of Minnesota
• Published multiple articles on colon cancer in international journals
• Trained at St. Mark's Hospital in London – a leader in colorectal surgery
• Senior professor at Ankara University's medical faculty

Ranked among Germany's TOP 100 gastroenterologists by Focus magazine – Prof. Porschen leads Bremen-Ost Clinic's Internal Medicine Department.

• Specializes in gastrointestinal tract tumors
• Develops German guidelines for esophageal cancer treatment
• Recipient of the Clinical Award for Gastroenterology
• Merit Award winner for metastatic colorectal carcinoma research
• Offers remote consultations for second opinions