Best Colonoscopy Doctors Abroad

Dr. Amit Tirosh is the Head of the Neuroendocrine Tumors (NET) Service at Sheba Medical Center. He is an international authority on von Hippel–Lindau (VHL) disease and hereditary tumor syndromes. Dr. Tirosh contributed to global clinical guidelines for VHL management. He also leads the Endocrine Oncology Bioinformatics Lab at Sheba.

• Contributor to the international expert panel on VHL management guidelines.
• Authored over 40 peer-reviewed papers in journals like JAMA and Gastroentrology.
• Maintains research affiliations with the NIH and the Weizmann Institute.
• Performs specialized NET treatments, including Lutetium-177 therapy and PRRT.

Dr. Bilal Ergul is a gastroenterologist at Lokman Hekim University Ankara Hospital. He is known for performing Peroral Endoscopic Myotomy (POEM) surgery. This procedure treats complex swallowing disorders without external incisions. Dr. Ergul has authored around 100 academic publications on various gastrointestinal topics.

• Specializes in laparoscopic surgery for GERD and gastric polyps removal.
• Treats chronic conditions including Crohn’s disease, ulcerative colitis, and cirrhosis.
• Performs esophagectomy and small intestine resections for complex cases.
• Works at an ISO-certified university hospital that treats 20,000+ patients annually.

Dr. Almog Ben Yaacov is a senior surgeon at Sheba Medical Center. He specializes in oncological surgery and the management of complex colorectal malignancies.

• Completed advanced surgical oncology training at Memorial Sloan Kettering Cancer Center in New York
• Expertise includes minimally invasive and laparoscopic surgery for intestinal conditions
• Performs colonoscopy and colorectal procedures at a leading Israeli medical facility
• Board certified in both general surgery and surgical oncology
• Authored multiple peer-reviewed publications on surgical outcomes for abdominal cancers

Dr. Einat Shacham Shmueli is a senior medical oncologist at Sheba Medical Center. She specializes in gastrointestinal cancers, treating the colon, stomach, and pancreas. Dr. Shacham Shmueli holds dual board certifications in oncology and gastroenterology. She trained at UCSF in the United States. Her clinic at Sheba Medical Center is ranked among the top 10 hospitals worldwide.

• Authored over 25 peer-reviewed publications on tumor biology and new treatments.
• Serves as an investigator for the National Cancer Institute (NCI) programs.
• Manages metastatic disease using precision diagnostics and specialized biomarkers.
• Member of the Israel Society of Oncology and Radiotherapy.

Professor Xiao Yueyong is Chief Physician in the Department of Radiological Diagnosis at the Chinese PLA General Hospital. He is a leading expert in minimally invasive interventional oncology. He serves as the inaugural President of WATA (2025–). He is President of the International (2020–) and Asian (2012–) Societies of Cryotherapy. He is also Deputy Head of the NHC Expert Group on tumour ablation regulations (2009–).

He has performed over 100,000 CT/MRI‑guided minimally invasive procedures. His work covers chemical ablation, RFA, MWA, cryoablation, and NanoKnife (IRE). He introduced and advanced NanoKnife ablation in China. He led the first national standards for tumour cryoablation and NanoKnife.

Honors include the National Special Contribution Award (Lifetime Honorary). He received First Prize from the Chinese Medicine Education Association (2021). He received two Second Prizes for Military Medical Achievements (2016, 2018) and two Second Prizes from the China Anti‑Cancer Association (2019, 2022). He was named Asian Ablation Master. His research record includes 13 Chinese patents. He is the principal investigator for four NSFC projects and one MOST subject. He has published over 200 papers, with over 110 as first or corresponding author and over 40 in SCI journals. He has led over 10 ablation guidelines or consensus statements.

Dr. Yuri Goldes is the Deputy Director of General Surgery at Sheba Medical Center. He pioneered some of Israel’s first robotic resections for stomach and pancreatic cancers. Forbes Israel named him among the nation’s best gastrointestinal surgeons. In 2019, he received the Best Doctor of the Year award from the Israeli Ministry of Health.

• Specializes in robotic and laparoscopic surgery for pancreatic, gastric, and esophageal cancers.
• Performs minimally invasive Whipple procedures, one of the most complex abdominal operations.
• Treats benign conditions including diaphragmatic hernia, achalasia, GERD, and gallbladder disease.
• Works at Sheba Medical Center, ranked among the Top 10 hospitals worldwide by Newsweek.

Dr. Tarik Akar specializes in advanced colonoscopy and endosurgical techniques at Hisar Hospital Intercontinental. He uses precise methods to detect and treat digestive disorders.

• Performs ESD to remove early-stage colon cancers during endoscopic procedures
• Winner of the Best Verbal Presentation Award at an international cancer congress
• Conducts colonoscopy with biopsies to ensure accurate diagnostic results
• Treats complex conditions like ulcerative colitis, Crohn's disease, and polyps
• Published 25 research papers in local and international medical journals

Dr. Mustafa Solak is a clinical oncologist at Hisar Hospital Intercontinental. He specializes in gastrointestinal malignancies, including colon cancer, and trained at MD Anderson Cancer Center.

• Completed an advanced oncology fellowship at the Hacettepe University Cancer Institute
• Treats complex gastrointestinal cancers including colon, stomach, and pancreatic tumors
• Practiced at the University of Texas MD Anderson Cancer Center in the USA
• Coordinates systemic treatments for advanced solid tumors and hematological conditions
• Member of the medical team at JCI-accredited Hisar Hospital Intercontinental

Professor Kivanc Derya Peker is a specialized gastrointestinal surgeon at Hisar Hospital Intercontinental. He performs colonoscopies and advanced endoscopic treatments for digestive system disorders.

• Founder of the Gastroenterology Surgery Clinic at Basaksehir Cam and Sakura City Hospital
• Trained at the Mayo Clinic in the United States in metabolic and biliary clinics
• Performed around 1,000 major operations including colectomies for colon cancer
• Ranked in the top 3 on his gastroenterology surgery specialization examination
• Member of the Turkish HPB Association focusing on liver and biliary tract health

Dr. Suleyman Hilmi Aksoy is a radiologist at Hisar Hospital Intercontinental in Istanbul. He specializes in diagnostic radiology, teleradiology, and interventional radiology. Dr. Aksoy previously held an Assistant Professorship at the Istanbul University Radiology Department. He has contributed to 13 medical congresses with numerous oral and written presentations.

• Member of the European Society of Radiology and the International Society of Radiology.
• Holds certifications from the Turkish Society of Interventional Radiology.
• Performs diagnostic procedures like angiography, CT scans, and biopsies.
• Works at a JCI-accredited hospital that treats over 500,000 patients annually.

Professor Zulfikar Polat leads gastroenterology services at Anadolu Medical Center in affiliation with Johns Hopkins Medicine. He specializes in diagnostic and interventional colonoscopy for complex intestinal diseases.

• Holds a professorship at Istanbul Aydin University and trained at Gulhane Military Medical Academy
• Published 45 research works on gastroenterology in national and international medical journals
• Member of the European Society of Gastrointestinal Endoscopy which sets global procedural standards
• Specializes in hepato-pancreatology and treating chronic inflammatory intestinal diseases

Professor Omer Necip Aytug is a senior gastrointestinal surgeon who leads advanced diagnostic colonoscopy at Hisar Hospital Intercontinental.

• Earned a professorship at Abant Izzet Baysal University – one of Turkey's academic medical centers
• Completed a gastroenterology fellowship at Marmara University School of Medicine
• Specializes in treating complex inflammatory conditions like Crohn's disease and ulcerative colitis
• Performs therapeutic procedures including the removal of colorectal polyps to prevent cancer
• Authors scientific articles on digestive disorders for international medical journals

Dr. Engin Tutar is a pediatric gastroenterologist at Hisar Hospital Intercontinental in Istanbul. He is the former head of Pediatric Gastroenterology at Marmara University. Dr. Tutar has delivered over 50 presentations at national and international medical congresses. He specializes in treating complex digestive, liver, and nutritional disorders in children.

• Performs diagnostic and therapeutic endoscopy, including polypectomy and esophageal variceal bleeding control.
• Treats inflammatory bowel disease, Celiac disease, and H. pylori infections.
• Manages chronic pediatric conditions such as growth disorders and liver diseases.
• Works at JCI-accredited Hisar Hospital, which treats over 500,000 patients annually.

Dr. Michal Kazanowski is an endoscopic surgeon at KCM Clinic in Poland. He specializes in general and oncological surgery with a focus on obesity. Dr. Kazanowski is a leading expert in the Allurion Programme for non-surgical weight loss. He uses gastric balloons to help patients achieve sustainable health results.

• Specializes in non-invasive weight loss methods and endoscopic obesity treatments.
• Performs endoscopic sleeve gastroplasty (ESG) and gastric balloon placements.
• Conducted international medical webinars on non-surgical obesity management.
• Works at ISO-accredited KCM Clinic, which serves over 700 international patients annually.

Dr. Ayhan Erdemir is a general surgeon at the JCI-accredited Anadolu Medical Center. He specializes in treating gastrointestinal disorders and sigmoid adenocarcinoma through advanced diagnostic and surgical procedures.

• Performed colonoscopy for cancer screening and gastrointestinal disorders for over 15 years
• Assistant Professor rank at Maltepe University – one of Turkey's academic medical schools
• Certified in da Vinci robotic surgery for high-precision abdominal operations
• Specializes in cytoreductive surgery to treat tumors within the abdominal cavity
• Member of the Surgical Oncology Society with specialized HIPEC training

Specialist in General Surgery | Gastrointestinal Endoscopy

Dr Marcin Olender is a specialist in general surgery with extensive clinical experience in the diagnosis and treatment of surgical and gastrointestinal conditions. At KCM Clinic, he focuses particularly on gastrointestinal endoscopy and provides patients with comprehensive diagnostic examinations of the upper and lower digestive tract.

His clinical practice combines surgical expertise with modern endoscopic diagnostic techniques, allowing patients to receive accurate assessment and appropriate recommendations based on their individual medical needs.

Areas of Expertise

Dr Olender specialises in:

• General surgery
• Gastrointestinal endoscopy
• Gastroscopy
• Colonoscopy
• Colonoscopy with polypectomy
• Diagnosis of diseases of the upper gastrointestinal tract
• Diagnosis of diseases of the lower gastrointestinal tract
• Endoscopic assessment of gastrointestinal symptoms
• Qualification for gastrointestinal endoscopic procedures
• Selected procedures supporting the treatment of obesity

At KCM Clinic, Dr Olender performs both gastroscopy and colonoscopy, including colonoscopy with removal of polyps when medically indicated.

Gastrointestinal Endoscopy

Gastrointestinal endoscopy is an important part of modern diagnosis and prevention of digestive system diseases.

During a gastroscopy, the oesophagus, stomach and duodenum are carefully examined. The procedure can help identify conditions such as inflammation, ulcers, bleeding and other abnormalities.

A colonoscopy allows examination of the large intestine and is an important tool in the diagnosis and prevention of colorectal cancer. When appropriate, polyps can be removed during the same procedure and subsequently sent for histopathological examination.

Dr Olender also performs endoscopic examinations as part of the diagnostic pathway for patients with gastrointestinal symptoms and conditions requiring further investigation.

A Patient-Centred Approach

Dr Olender places particular emphasis on patient safety, careful diagnosis and clear communication.

Before an examination, patients receive information about the procedure and preparation requirements. During the consultation, the patient's symptoms, medical history and individual risk factors are taken into consideration.

The goal is to make the diagnostic process as comfortable, safe and informative as possible while ensuring that patients understand the purpose and results of their examination.

Experience in Bariatric Care

Dr Olender is also a member of the multidisciplinary bariatric team at KCM Clinic. His work in this area includes gastrointestinal diagnostics and selected endoscopic procedures supporting the treatment of obesity, including the placement of a gastric balloon as part of an individually tailored weight-management programme.

Gastrointestinal endoscopy can play an important role in the assessment and preparation of patients undergoing bariatric treatment, helping physicians evaluate the condition of the digestive tract and identify potential medical considerations before treatment.

Your Visit at KCM Clinic

During your appointment, Dr Olender will discuss your symptoms, medical history and the reason for the examination. You will receive information about how to prepare for the procedure, what to expect during the examination and any necessary follow-up.

Our priority is to provide patients with professional medical care, accurate diagnostics and a comfortable experience throughout the entire diagnostic process.

Dr. Pichai Kittipanyaworakul is an internal medicine specialist, gastroenterologist, and hepatologist at Intrarat Hospital in Bangkok. He holds a diploma in gastroenterology and hepatology from the prestigious Ramathibodi Hospital. Dr. Kittipanyaworakul treats digestive tract disorders and complex liver conditions. He works at Intrarat Hospital, an ISO-certified facility that treats over 100,000 patients annually.

• Performs specialized procedures including stomach resection, esophagectomy, and cholecystectomy.
• Provides diagnostic expertise in gastroscopy with biopsy, colonoscopy, and Fibroscan liver imaging.
• Manages laparoscopic anti-reflux surgery and laparoscopic gallbladder removal.
• Treats patients at a hospital with 26 departments and 200 resident physicians.