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Professor Ali Tüzün İnce, MD

Digestive System Diseases, Endoscopic Procedures

Experience in Gastroenterology, Information You Can Trust

Accurate, current and understandable information about diseases of the digestive system and endoscopic procedures.

This site was prepared in the light of many years of clinical and academic experience, to help patients better understand their complaints, their test results and the treatment options open to them.

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Prof. Ali Tüzün İnce, MD continues his academic and clinical work at the Department of Gastroenterology, Bezmialem Vakıf University.

In the light of that experience, the site sets out to guide patients who have a digestive complaint, who need a gastroenterology assessment, or who are to have an endoscopy or a colonoscopy — as well as those who need an advanced endoscopic procedure or a second opinion.

What is troubling you?

Most people search for what they feel rather than for a diagnosis. Each complaint below leads to the pages that discuss it.

Abdominal pain
Irritable Bowel Syndrome (IBS)Gallstones: What Do They Mean?Diverticulosis, Diverticulitis and Diverticular BleedingCrohn's DiseaseUlcerative Colitis
Bloating
Gas and BloatingIrritable Bowel Syndrome (IBS)Coeliac DiseaseDelayed Gastric Emptying (Gastroparesis)Ascites (Fluid in the Abdomen)
Wind
Gas and BloatingIrritable Bowel Syndrome (IBS)Coeliac DiseaseDelayed Gastric Emptying (Gastroparesis)
Heartburn (reflux)
Reflux DiseaseBarrett's Oesophagus
Difficulty swallowing
AchalasiaReflux DiseaseBarrett's Oesophagus
Nausea and vomiting
Helicobacter pylori InfectionDelayed Gastric Emptying (Gastroparesis)Cyclic Vomiting Syndrome
Complaints

Information about digestive system conditions

If you know where your complaint is coming from, start there. Every organ on the drawing leads to the pages written about it.

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The digestive system seen from the front, on a dark navy ground. The oesophagus runs down from the top into the stomach; an endoscope passing through it lights the inside of the stomach at its tip. The liver is on the left as one dark red organ with the green gallbladder at its lower edge; the stomach is in the centre, cut open so the lining shows; the small purple spleen sits at the stomach’s upper right, tucked behind it. The orange pancreas lies across below the stomach. Beneath that the large bowel frames the coils of the small bowel on three sides; the appendix is at the lower left, the rectum and anus at the bottom. Labels: oesophagus, endoscope, liver and biliary tract, stomach, spleen, pancreas, large bowel, small bowel, anorectal region.

Procedures

Endoscopic procedures

Preparation, the procedure itself, and aftercare — explained step by step for each examination.

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Gastroscopy

Gastroscopy is the procedure of examining the upper digestive tract with a long, tube-shaped, flexible instrument that has its own light source and a camera at its tip.

Colonoscopy and Preparing for It

Colonoscopy is the examination of the inner surface of the large bowel with a thin, flexible instrument carrying a camera, allowing biopsies and the removal of polyps where these are needed.

Polypectomy (Removing a Polyp)

Polypectomy is the removal of polyps in the stomach or bowel during endoscopy or colonoscopy; no incision is made, and removing suitable polyps can prevent bowel cancer.

What people ask most about endoscopy and colonoscopy

The four asked most often, answered from the procedure pages on this site.

Frequently asked questions

When should you see a gastroenterologist?

The digestive system is made up of the mouth, the oesophagus, the stomach, the gallbladder, the liver, the pancreas, the small and large intestines, the rectum and the anus. Diseases of these organs fall within the field of gastroenterology. Some complaints to do with the digestive system that look simple to you can sometimes be the first signs of very serious disease. If you have:

  • Abdominal pain with no explanation
  • Weight loss
  • Unexplained blood in the stool
  • Changes in the calibre and shape of the stool
  • Haemorrhoid complaints that keep getting worse
  • A history of bowel cancer, or of a malignant polyp (adenoma), in a member of your family
  • Unexplained laboratory findings (anaemia, or a rise in the sedimentation rate, CRP, CEA and AFP levels)
  • Diarrhoea lasting more than twenty days
  • Changes that have begun in your bowel habit (constipation starting for no reason, alternating periods of diarrhoea and constipation)
  • Increasing difficulty in swallowing, together with weight loss
  • Stomach pain, vomiting and blood in the vomit that will not pass and does not respond to medical treatment
  • Yellowing of the eyes and skin, weakness, tiredness, darkening of the urine, persistent itching

“Remember: ignoring it does not only cost you time”

Urgent symptoms

Image archive

Endoscopic atlas

Photographs of findings as they appear at endoscopy, with the physician’s notes. Every entry is made of real patient images of that finding.

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106 images

Academic work

For his academic work and scientific publications, see the curriculum vitae.

Curriculum vitae All publications

  1. 2026 Is it possible to predict hemorrhage after endoscopic papillectomy?
  2. 2026 The efficacy of multiple stenting from minor papilla in achieving sustained remission of recurrent acute pancreatitis
  3. 2025 EUS-Guided Pancreatic Duct Drainage: On which patients, how to perform it? Is it as complicated as thought?

Prof. Ali Tüzün İnce, MD — https://www.alituzunince.com/en/