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Prof. Dr. Yaşar Çolak
Gastroenterology and Advanced Endoscopic Applications Specialist

Gastroenterology and Advanced Endoscopic Applications Specialist Prof. Dr. Yaşar Çolak studied at Istanbul University Çapa Faculty of Medicine between 1996-2002. Then he did his specialization (2002-2008) in the Department of Internal Medicine at the same faculty. Prof. Dr. Yaşar Çolak, who completed his upper specialization in Istanbul Medeniyet University Gastroenterology Department between 2008-2011, started his academic career as an associate professor at Istanbul Medeniyet University Gastroenterology Department in 2012 and continued his duty as a professor in 2018.

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Gastroentrology Coordinator
Sinem Yalcin

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During this period, she worked at Şişli Florence Nightingale Liver Transplantation Unit (2014) in the evaluation of liver transplant candidates and follow-up of their transplantation and post-transplantation processes. Afterwards, she worked at Bezmialem Vakıf Gureba Hospital Gastroenterology Department (2016) in the advanced endoscopic applications department, especially on ERCP (endoscopic retrograde cholangio pancreaticography) and EUS (endoscopic ultrasonography) procedures. In order to increase his experience in this field, he worked in the Advanced Endoscopic Applications Department at Cleveland Clinic Florida, USA between 2015-2016. After returning to Turkey, Prof. Dr. Yaşar Çolak worked at the Presidency Health Coordinatorship between 2016-2019 and simultaneously continued his academic career as a lecturer at Istanbul Medeniyet University. During this assignment, he continued to work actively in the field of advanced endoscopic applications.

As his work in this field came to the forefront, he joined the Advanced Endoscopic Applications Department at Cleveland Clinic Florida, USA, where he had previously worked, as an invited faculty member for a year. Prof. Dr. Yaşar Çolak, who was entitled to receive the ECFMG certificate required to continue his professional career as a doctor in the USA, has authored many international articles in the field of advanced endoscopic applications. During this period, he also specialized in endoscopic sleeve gastroplasty techniques. Prof. Dr. Yaşar Çolak has been working at Memorial Şişli Hospital, Gastroenterology Clinic since November 2022.

Among the other advanced endoscopic procedures he performs is POEM (per oral endoscopic myotomy) in the treatment of lower esophageal strictures called achalasia.

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Prof. Dr. Yaşar Çolak’s professional interests include routine endoscopic procedures (gastroscopy and colonoscopy) as well as advanced endoscopic applications. Endoscopic bariatric (obesity-related) procedures include endoscopic sleeve gastroplasty, gastric botox and gastric balloon procedures; EMR (endoscopic mucosal resection) and ESD (endoscopic submucosal dissection) under the title of endoscopic removal of lesions, tumors and early stage cancers in the digestive system; ERCP (Endoscopic Retrograde Cholangio Pancreatography) method under the title of advanced endoscopic procedures related to the biliary tract and pancreas (bile duct stones, biliary tract and pancreatic obstructions and cancers); EUS (endoscopic ultrasonography) method under the title of diagnosis and treatment of lesions by taking biopsies from tumors, cysts and cancers in the digestive system and surrounding organs (especially pancreas); endoscopic stent applications under the heading of procedures for the removal of obstructions due to digestive system cancers; capsule endoscopy under the heading of procedures for the evaluation of small intestine lesions; endoscopic feeding tube (PEG, percutaneous endoscopic gastrostomy) placement under the heading of procedures for the treatment of malnutrition in cases where oral food intake is not sufficient; manometry and pH meter applications under the heading of procedures for the diagnosis of reflux and esophageal diseases.

In addition, esophageal band ligation and sclerotherapy application under the title of esophageal varices treatment procedures in patients with cirrhosis; Finally, under the title of endoscopic procedures for gastrointestinal system bleeding, there are applications such as argon plasma coagulation (endoscopic laser), hemoclip and sclerotherapy.

Prof. Dr. Yaşar Çolak, who has published many medical articles in prestigious international journals, continues his academic career with 18 H indexes and nearly two thousand citations. Prof. Dr. Yaşar Çolak, who speaks English fluently, has a son named Eren.

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