Gastroenterology Prof. Dr. Hakan Ümit Ünal
✓ Medically verified profileProf. Dr. Hakan Ümit Ünal
✓ Medically verified profile
About Prof. Dr. Hakan Ümit Ünal
Quick answer
Prof. Dr. Hakan Ümit Ünal is a gastroenterologist at Acibadem Bakirkoy Hospital in İstanbul with more than 19 years of experience.
He treats complex gastrointestinal and liver diseases, including colorectal cancer, acute and biliary pancreatitis, chronic hepatitis C, hepatic fibrosis, bezoars, terminal ileal polypoid lesions, and patent ductus venosus, and performs gastrointestinal endoscopy and endoscopic retrograde cholangiopancreatography, with enteral and parenteral nutrition support. He consults in Turkish and English and offers online…
Prof. Hakan Ümit Ünal is a gastroenterologist with a strong clinical and academic background. He completed his medical training in Gastroenterology at Başkent University Faculty of Medicine in 2006. Currently affiliated with Acibadem Health Group since 2024, he provides advanced care in digestive diseases, endoscopic procedures, and nutritional support for patients with complex gastrointestinal and liver conditions.
He is an active member of several professional societies, including the Turkish Society of Gastrointestinal Endoscopy, the Society for Clinical Enteral and Parenteral Nutrition, the Turkish Gastroenterology Association, and the Turkish Association for Liver Research. These memberships reflect his commitment to endoscopic excellence, clinical nutrition, and liver disease research. Colleagues and patients recognize him for his evidence-based approach, attention to patient-centered care, and continuous engagement with developments in gastroenterology and hepatology.
Areas of Expertise
Conditions treated and procedures performed by this specialist.
Education
- 2006Başkent University Faculty of Medicine Gastroenterology
- 2003Başkent University Faculty of Medicine Internal Medicine
- 1998Gazi University Faculty of Medicine
Professional Experience
- 2024Acibadem Health Group
- 2015–2017Memorial Service Hospital
- 2010–2015Başkent University Istanbul Hospital Gastroenterology
- 2008–2009Diyarbakır Military Hospital / Gastroenterology / Military Service
- 2007–2009Diyarbakır State Hospital / Compulsory Service
Professional Memberships
- Turkish Society of Gastrointestinal Endoscopy
- Society for Clinical Enteral Parenteral Nutrition
- Turkish Gastroentrology Association
- Turkish Association for Liver Research
Selected Publications
- Lack of relationships between FGF19 staining pattern,lymph node metastasis and locally invasive characteristics of the tumor in colorectal cancers. Asian Pac J Cancer Prev. 2013;14(5):3151-4. Unal HU.Demiralay E, Tepeoglu M, Fidan C, Kilickap S.
- Black punctate appearance in the rectum. Endoscopy 2011: 19(1): 35-3 Ünal HU, Seçmen Ü, Korkmaz M, Yılmaz U.
- Gaucher’s Disease Presenting with Massive Hepatic Fibrosis and Skeletal Abnor malities: A Case Report with Review of the Literature. Türkiye Klinikleri J MedSci 2011; 31(3): 752-8 Yalcin K, Uchmak F, Bektas R, Unal H.U, Necmioglu S, Mızrak B.
- ExtraordinarilyElevated Serum Level of CA 19-9 and Rapid Decrease After Succesfull Therapy A casereport andreview of literature. Turk J Gastroenterol 2010; 21 (4): 461¬463 Korkmaz M, Unal H, Selcuk H, Yilmaz U.
- A cute Pancreatitis Following Doxycycline and Ornidazole Coad ministration. JOP. J Pancreas. 2010 Nov 9: 11(6): 614-616 Ocal S, Selcuk H, Korkmaz M, Unal H, Yilmaz U.
- Polypoid formation in terminal ileum Endoscopy 2010: 18(1): 23 Ünal H, Kalaycı S, Korkmaz M, Savaş N, Selçuk H.
- When Should ERCP Be Performed in Biliary Pancreatitis? Endoscopy 2009; 17(2): 94-98 Korkmaz M, Unal H, Selcuk H, Yilmaz U.
- Subacutely formed bezoar resulting from accidentally ingested industrial materia Selcuk H, Unal H, Korkmaz M, Yilmaz U
- Original Images: Asymptomatic elderly patient diagnosed with patent ductusvenosus. Academic Gastroenterology, 7 (3) 2008: 127-128 Ünal H, Korkmaz M, Kırbaş İ, Selçuk H, Yılmaz U
- What Chronic C Hepatitis Looks Like but Cannot Be Seen: Lichen Planus Güncel Gastroenterology 12 (3) 2008: 146-150 (2008) Ünal H, Selçuk H,
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What patients say about Prof. Dr. Hakan Ümit Ünal
★★★★★From 2,400+ verified patient reviews“My rotator cuff repair was handled with real skill and genuine care. Assoc. Prof. Dr. Tunali answered all of my questions with patience.”
“I was nervous about my thyroid treatment, but I felt safe at every single step. Assoc. Prof. Dr. Ünal answered all of my questions with patience. I have already recommended Acibadem to my family.”
“The care I received for my diabetic eye care was world-class from start to finish. Dr. Tüzünalp explained the risks honestly and earned my full trust. I have already recommended Acibadem to my family.”
“My gastrointestinal cancer surgery exceeded every expectation I had. Asst. Prof. Dr. Ünal kept me informed and reassured throughout. The follow-up care was just as good as the treatment itself.”