Head of the Gastroenterology and Hepatology Department, Gastroenterologist

Dr. Olga Krast is the Chief Executive of BIOAGE Clinic, specialising in Anti-Aging Medicine, Beauty Therapy, Non-Surgical Facial Aesthetics, and Psychotherapy. Here are the key takeaways about her:

• Chief Executive of BIOAGE Clinic
• Specialises in Anti-Aging Medicine, Beauty Therapy, Non-Surgical Facial Aesthetics, and Psychotherapy
• Speaks English and Russian

Dr. Natalya Shevchenko is a Gastroenterologist of the highest category with 15 years of experience and 67 reviews. She specializes in the treatment of gastritis, colitis, pancreatitis, esophageal ulcers, gastroenterocolitis, peptic ulcer, etc. and offers transcription of studies and analyzes and development of a treatment plan.

• Gastroenterologist of the highest category
• 15 years of experience
• 67 Reviews
• Treats Adults
• Kharkiv National Medical University education
• Offers transcription of studies and analyzes
• Develops a treatment plan

Director of Obesity Therapy Department

Specialist in endocrinology and nutrition

Dr. Binnur Simsek is a gastroenterology specialist. She has experience in liver cirrhosis, portal hypertension, hepatocellular carcinoma, liver transplantation, and viral hepatitis (B, C, Delta). She also treats alcoholic and non-alcoholic fatty liver disease, peptic ulcers, gastrointestinal bleeding, and inflammatory bowel diseases such as ulcerative colitis and Crohn’s colitis.

She completed her medical and gastroenterology training at Istanbul University Faculty of Medicine. Dr. Simsek has worked at Istanbul University, Sanlıurfa Education and Research Hospital, Liv Hospital, and Istinye University. She is a member of the Turkish Association for the Study of the Liver and the Turkish Society of Gastroenterology.

Areas of Interests

• 0-18 Years Old Healthy Child Monitoring and Tracking
• Breast Milk, Breastfeeding and Nutrition Consultancy
• Newborn Care and Follow-up
• Vaccines and Preventive Medicine
• Nutrition in Infancy and Childhood
• Childhood Diseases

Education:

• Istanbul University Istanbul Faculty of Medicine 2009-2015
• Istanbul University Istanbul Faculty of Medicine Department of Child Health and Diseases 2016-2019
• Şişli Hamidiye Etfal Training and Research Hospital, Department of Child Health and Diseases 2020

Experience:

• Liv Hospital Ulus
• Private Levent Hospital 2022-2023
• Van Özalp State Hospital 2021-2022
• Şişli Hamidiye Etfal Training and Research Hospital Child Health and Diseases Clinic 2020
• Istanbul University Istanbul Faculty of Medicine Child Health and Diseases Clinic 2016-2019
• Denizli State Hospital Pediatric Emergency Service 2015-2016
•  
• Psoriatic Arthritis in the Differential Diagnosis of Zinc Deficiency - Scientific Poster Presentation (38th Pediatrics Days - 2016)
• Myoclonic Epilepsy in a Patient with Type 1 Diabetes Mellitus - Scientific Poster Presentation (39th Pediatrics Days - 2017)
• Evaluation of Children Diagnosed with Acute Pancreatitis - Specialization Thesis (November 2020)

Areas of Interests

• Inflammatory Bowel Disease (Ulcerative Colitis, Crohn's Disease)
• Chronic Liver Diseases and Cirrhosis
• Motility Disorders
• Gastroesophageal Reflux Disease
• Gall bladder and biliary tract diseases

Education and Experiences

• Istanbul University Cerrahpasa School of Medicine  1999-2005
• Okmeydani Education and Research Hospital 2005-2010
• Yeditepe University School of Medicine 2011-2015
• Liv Hospital Ulus 2018 -
• Haydarpaşa Education and Research Hospital, Department of Gastroenterology 2015-2018
• Yeditepe University School of Medicine, Department of Gastroenterology 2011-2015
• Erciş State Hospital 2010-2015
• Okmeydani Education and Research Hospital Department of Internal Medicine 2005-2010

Publications in International Refereed Journals:

1. Aslan E, Tecimer T. Periampullary nodularity in an asymptomatic patient. Gastroenterol Hepatol. 2023 Apr;46(4):307-308. English, Spanish. doi: 10.1016/j.gastrohep.2022.09.006. Epub 2022 Sep 26. PMID: 36174798.

2. Gonen C, Surmelioglu A, Kochan K, Ozer S, Aslan E, Tilki M. Impact of intestinal ultrasound with a portable system in the management of Crohn's disease. Gastroenterol Rep (Oxf). 2020 Dec 10;9(5):418-426. doi: 10.1093/gastro/goaa088. PMID: 34733527; PMCID: PMC8560037.

3. Güzelbulut F, Gökçen P, Can G, Adalı G, Değirmenci Saltürk AG, Aslan E, Özdil K, Doğanay HL. Comparison of the Efficacy of Entecavir and Tenofovir in Reducing Hepatocellular Carcinoma Risk in Chronic Hepatitis B Patients: A Real-Life Study in Turkey. Turk J Gastroenterol. 2021 Apr;32(4):412-421. doi: 10.5152/tjg.2021.20423. PMID: 34231488; PMCID: PMC8975336.

4. Abbasov A, Aslan E, Ekici AID, Dolay K. A rare subepithelial lesion in the stomach: Gastric adenomyoma. Surg Pract. 2021; 25: 116–119. https://doi.org/10.1111/1744-1633.12495

5. Aslan E. Black esophagus. Intern Emerg Med. 2021 Mar;16(2):503-504. doi: 10.1007/s11739-020-02463-4. Epub 2020 Aug 3. PMID: 32748126.

6. Batman B, Altun H, Simsek B, Aslan E, Namli Koc S. The Effect of Laparoscopic Sleeve Gastrectomy on Nonalcoholic Fatty Liver Disease. Surg Laparosc Endosc Percutan Tech. 2019 Dec;29(6):509-512. doi: 10.1097/SLE.0000000000000672. PMID: 31107849.

7. Aslan E, Gonen C. A rare cause of rectal bleeding. Acta Gastroenterol Belg. 2018 Apr-Jun;81(2):350. PMID: 30024717.

8. Eren OO, Ozturk MA, Sonmez O, Aslan E, Ozkan F, Oyan B. Gastric metastasis in a patient with lobular breast carcinoma 6 years after diagnosis. J Gastrointest Cancer. 2014 Dec;45(4):504-5. doi: 10.1007/s12029-014-9619-6. PMID: 24788083.

9. Aslan E, Akyüz Ü, Pata C. The use of Ankaferd in diverticular bleeding: two case reports. Turk J Gastroenterol. 2013;24(5):441-3. doi: 10.4318/tjg.2013.0640. PMID: 24557969.

10. Ozturk MA, Eren OO, Sarikaya B, Aslan E, Oyan B. Pituitary metastasis of colon adenocarcinoma: a rare occurrence. J Gastrointest Cancer. 2014 Dec;45 Suppl 1:85-7. doi: 10.1007/s12029-013-9554-y. PMID: 24158699.

11. Altintas N, Aslan E, Helvaci A, Malhotra A. Relationship between obstructive sleep apnea severity index and left ventricular function and volume. Ann Saudi Med. 2012 Jul-Aug;32(4):384-90. doi: 10.5144/0256-4947.2012.384. PMID: 22705609; PMCID: PMC3821963.
 

Publications in National Refereed Journals:

1. Ekrem Aslan, Ayça Saltürk, Koray Koçhan, Serhat Özer, Halil Şahin, Osman Bedir, Mevlüt Kıyak, Emine Kanatsız, Ali Sürmelioğlu, Can Gönen, Fatih Güzelbulut. Evaluation of the Efficacy and Safety of Self-Expanding Metal Stents in Malignant Esophageal Strictures Due to Esophageal and Extraesophageal Cancers: A Retrospective Cross-Sectional Cohort Study. Haydarpasa Numune Med J. 2024; 64(3): 381-390

2. Aslan, E., Gönen, C., Saltürk, A., & Güzelbulut, F. (2018). Hepatotoxicity After Desflurane Anesthesia. The Medical Journal Of Haydarpaşa Numune Training and Research Hospital, 58(4), 224-226.

3. SALTÜRK, A. D., ARSLAN, E., GÖKDEN, Y., KOÇHAN, K., ÖZER, S., & GÖNEN, C. (2016). A rare first finding of Crohn's disease: acute pancreatitis. academic journal of gastroenterology, 15(2), 88-89.

4. İçten, S., Altintas, N., Helvaci, A., & Aslan, E. (2013). Clinical Characteristics and Evaluation of Sarcoidosis Cases in Our Center, Our 7-Year Experience.

5. Akyüz, Ü., Akyüz, F., Özdil, K., Aslan, E., Niğdelioğlu, A., Ağan, A. F., ... & Pata, C. (2012). Food impaction in advanced age: Remember eosinophilic esophagitis. academic journal of gastroenterology, 11(2), 78-80.

6. PATA, C., ASLAN, E., & AKYÜZ, Ü. (2000). Advanced Endoscopic Procedures. Current Gastroenterology, 22, 77-85.

7. Altintas, N., Yildiran, I., Aslan, E., & Helvaci, A. Mucociliary Dysfunction in Bronchial Asthma and Effect of Inhaled Corticosteroids Treatment on Mucociliary Clearance.

8. Ozturk, M. A., Dogan Ekici, I., Aslan, E., Erdik, B., & Oyan Uluc, B. A PAINFUL, ERYTHEMATOUS, NODULAR LESION IN BUCCAL REGION. YEDITEPE MEDICAL JOURNAL, 6(23), 555-558.

Areas of Interests

• General Gastrointestinal Diseases
• Endoscopic procedures (gastroscopy, colonoscopy, enteroscopy, capsule endoscopy)
• Interventional endoscopy
• ERCP
• Endoscopic ultrasonography (EUS)
• Cholangioscopy
• Diseases of the biliary system and pancreas

Education:
 

• 1990 -1996 Ankara University Faculty of Medicine
• 1997 - 2001 Ankara Numune Training and Research Hospital Internal Medicine Residency
• 2001 - 2003 Turkey High Specialization Training and Research Hospital, Gastroenterology Subspecialization
• 2010 - 2010 State University of New York, USA, Department of Gastroenterology, EUS training program
   

Experience:
 

• June 2024 LIV Hospital Ulus Hospital
• 2018 - 2024 Florence Nightingale Hospitals, Gastroenterology Clinic
• 2013 - 2018 Memorial Ataşehir Hospital, Gastroenterology Clinic
• 2008 - 2013 Gaziantep University Faculty of Medicine, Department of Gastroenterology, Assoc. Prof. Dr.
• 2008 - 2008 Medicalpark Gaziantep Hospital Gastroenterology Clinic
• 2004 - 2008 Gaziantep State Hospital Gastroenterology Clinic, Endoscopy Unit Founding Physician

Publications

• Arhan M, Koklu S, Koksal AS, Yolcu OF, Koruk S, Koruk I, Kayacetin E. Alverine citrate induced acute hepatitis. World J Gastroenterol 2004; 10(15): 2303-4  ISSN: 1007-9327
• Parlak E, Cicek B, Koruk I, Disibeyaz S, Sahin B. Successful prevention of stent migration caused by placement of a second stent. Endoscopy. 2005; 37(4): 404. ISSN: 0013-726X
• Koruk I, Ozturk ZA, Köklü S, Koruk S, Ozdede S. Port-site metastasis after laparoscopic cholecystectomy. Acta Gastroenterol Belg. 2008; 71(2): 283-4      ISSN:0001-5644
• Koruk I, Parlak E, Secilmis S, Akdogan M, Koklu S.  Endoscopic sphincteroplasty with large balloon dilatation for extraction of difficult common bile duct stones. Dig Dis Sci. 2008 Jun;53(6):1737-8. ISSN: 0163-2116
• Ozkaya M, Yuzbasioglu MF, Koruk I, Cakal E, Sahin M, Cakal B. Preoperative detection of insulinomas: two case reports. Cases J. 2008 Nov 29; 1(1): 362  ISSN: 1757-1626
• Yılmaz Ö, Koruk İ, Çayır K, Koruk M, Yılmaz A. Usefullness of serum insulin-like growth factor (IGF-1) and insulin-like growth factor binding protein-3 (IGFBP-3) for colorectal cancer diagnosis. Int J Hematol Oncol 2009; 19(1): 23-27  ISSN: 1306-133X
• Savaş C, Koruk İ, Koruk M, Kadayıfçı A, Sarı İ. Association of prion protein with the stage of liver fibrosis in chronic viral hepatitis. Trakya Univ Tip Fak Derg. 2010; 27(4): 373-7. DOI: 10.5174/tutfd.2009.02284.1 ISSN: 1301-3149
• Buyukberber M, Koruk I, Cıkman O, Koruk M, Kucukoglu ME, Sakman A, Demir O, Sahinoz S. Serum cystatin C measurement in differential diagnosis of intra and extrahepatic cholestatic diseases. Ann Hepatol 2010; 9(1): 58-62  ISSN: 1665-2681
• Gulsen MT, Koruk I, Dogan M, Beyazit Y. Diagnostic accuracy of cascade stomach by upper gastrointestinal endoscopy in patients with obscure symptoms: A multi-center prospective trial. Clin Res Hepatol Gastroenterol. 2011; 35: 489-93. DOI: 10.1016/j.clinre.2011.03.004         ISSN: 2210-7401
• Koruk I, Aydın U, Koruk S, Aydınlı M. A newly defined biliary anatomic variation. Turk J Gastroenterol 2011; April 22(2): 232-3  DOI:10.4318/ tjg.2011.0204  ISSN: 1300-4948
• Koruk İ, Özdemir H, Aydınlı M, Tarakçıoğlu M, Koruk M. The relation between serum Cytokeratin 18 and acute pancreatitis: Can it be a serological predictive marker?. Turk J Gastroenterol. 2011. DOI:10.4318/tjg.2011.0256 ISSN: 1300-4948
• Aydinli M, Koruk I, Koruk S, Aydin U, Kadayifci A. Intraoperative cholangioscopy with an ultrathin endoscope for hemobilia. Endoscopy 2011;43 Suppl 2 UCTN:E410. doi: 10.1055/s-0030-1256897. Epub 2012 Jan 24
• Aydinli M, Koruk I, Dag MS, Savas MC, Kadayifci A. Ultrathin endoscopy for gastrointestinal strictures. Digestive Endoscopy 2012 May;24(3):150-3. doi: 10.1111/j.1443-1661.2011.01206.x. Epub 2011 Oct 27                 ISSN: 0915-5635
• Yılmaz Ö, Koruk İ, Onbaş O, Ozgokce M. Portal venous gas resulting from enteritis in a case with portal hypertension: Case report. Türkiye Klinikleri Tıp Bilimleri Dergisi. 2012; 32 (4): 1195-8 ISSN: 1300-0292
• Demiryürek S, Koruk I, Bozdag Z, Ozkara E, Kaplan DS, Oztuzcu S, Cetinkaya A, Alasehirli B, Demiryürek AT. Investigation of the esophageal Rho-kinase expression in patients with Barrett's esophagus. Ultrastruct Pathol. 2013 Aug;37(4):284-9. doi: 10.3109/01913123.2013.797064        ISSN: 0191-3123
• Dag MS, Ozturk ZA, Koruk I, Kısacık B, Gerenli O, Aydınlı M, Kadayıfcı A. Intestinal Behcet's disease with severe pulmonary arterial involvement mimicking ulcerative colitis. Asian Biomedicine. 2013; 7(5): 715-8      ISSN: 1905-7415
• Dağ MS, Aydınlı M, Oztürk ZA, Türkbeyler IH, Koruk I, Savaş MC, Koruk M, Kadayıfçı A. Drug- and herb-induced liver injury: a case series from a single center. Turk J Gastroenterol. 2014 Feb;25(1):41-5. doi: 10.5152/tjg.2014.4486ISSN: 1300-4948
• Kadayifci A, Atar M, Parlar S, Balkan A, Koruk I, Koruk M. Transnasal endoscopy is preferred by transoral endoscopy experienced patients. J Gastrointestin Liver Dis. 2014 Mar;23(1):27-31     ISSN: 1841-8724
• Alasehirli B, Oğuz E, Oksuzler E, Koruk I, Oztuzcu S, Ozkara E, Karakok M, Erbagcı AB, Demiryurek AT. Investigation of intercellular adhesion molecules (ICAMs) gene expressions in patients with Barrett's esophagus. Tumour Biol. 2014 May;35(5):4907-12. doi: 10.1007/s13277-014-1644-3      ISSN: 1010-4283
• Dag M, Özturk Z, Aydınlı M, Koruk I, Kadayfçı A. Postpartum hepatotoxicity due to herbal medicine Teucrium polium. Ann Saudi Med. 2014 Nov-Dec;34(6):541-3. doi: 10.5144/0256-4947.2014.541        ISSN: 0256-4947
• Tahtacı M, İbiş M, Koruk İ, Parlak E. Endoscopic removal of fractured basket traction wire. Turk J Gastroenterol. 2014 Dec;25 Suppl 1:324-5. doi: 10.5152/tjg.2014.6582            ISSN: 1300-4948
• Dağ MS, Koruk İ, Aydınlı M, Çam H, Öztürk ZA, Kadayıfçı A. An unusual cause of esophageal ulcer; sertraline hydrochloride. Turk J Gastroenterol. 2014 Dec;25 Suppl 1:250-1. doi: 10.5152/tjg.2014.4646  ISSN: 1300-4948
• Balkan A, Yılmaz N, Balkan Y, Koruk İ, Örkmez M, Aydınlı M, Koruk M. Relationship between liver injury and serum cytokeratin 18 levels in asymptomatic hepatitis B virus carriers and in patients with chronic hepatitis B infection. Arab Journal of Gastroenterology. 2017; 18: 98–103                   ISSN: 1687-1979
• Koruk İ. How to manage difficult cannulation in ERCP. Gastroenterology and Hepatology: Open Access. 2017, 6(3): 00194. DOI: 10.15406/ghoa.2017.06.00194 ISSN: 2373-6372
• Valori R, Cortas G, de Lange T, Balfaqih OS, de Pater M, Eisendrath P, Falt P, Koruk I, et al.  Performance measures for endoscopy services: A European Society of Gastrointestinal Endoscopy (ESGE) Quality Improvement Initiative.  Endoscopy 2018; 50: 1186–1204   ISSN 0013-726X
• Koruk S, Koruk I, Mizrak A. A, Bilgi M, Gul R, Bozgeyik S. Dexmedetomidine or midazolam in combination with propofol for sedation in endoscopic retrograde cholangiopancreatography: a randomized double blind prospective study. Videosurgery Miniinv. 2020; 15(3): 526-32 doi.org/10.5114/wiitm.2020.95066

Dr. Muhammed Zubeyr Üçüncü is an Associate Professor of Surgery and a specialist in General Surgery. He earned his medical degree from Istanbul University, Istanbul Medicine Faculty. He is known for his skills in acute biliary pancreatitis, endoscopy, trauma and emergency surgery, obesity, and breast health.

Dr. Üçüncü has published more than 15 peer-reviewed articles. His research covers breast cancer, gastrointestinal diseases, and surgical methods. He has presented his work at international congresses, including the SIS World Congress on Breast Healthcare and the European Congress of Trauma and Emergency Surgery.

He is certified in Advanced Trauma Life Support and Advanced Endoscopy. He is also a member of the International Federation for the Surgery of Obesity and Metabolic Disorders. Dr. Üçüncü has helped improve breast cancer prognosis and minimally invasive surgery in Turkey.

アディル・バイカン博士は、トルコにおける主要な一般および腫瘍外科医であり、28年以上の経験を持っています。彼は結腸直腸手術、内視鏡および腹腔鏡手術、ならびに甲状腺と乳房の疾患に特化しています。また、大腸癌に関するいくつかの記事を国内および国際的なジャーナルに発表しています。

• アンカラ大学医学部での医学博士号
• アンカラ大学医学部での内視鏡および腹腔鏡手術の専門コース
• アンカラ大学医療一般外科クリニックでのレジデンシー
• アンカラ大学医療一般外科クリニックでの主任助手
• アンカラ大学医学部での一般外科学准教授
• タクシム訓練研究病院の一般外科部門での上級外科医
• ロンドンのセントマーク病院での3ヶ月間の結腸直腸手術の実践
• アンカラ大学医学部での上級教授
• 米国ミネソタ大学およびメイヨークリニックでの結腸直腸手術の実践
• シシュリ・エトファル訓練研究病院の一般外科部門での上級外科医
• メディステート・カヴァジク病院での上級外科医
• 大腸癌に関するいくつかの記事を国内および国際的なジャーナルに発表しています

エルデム・コチャク教授、医学博士

内科医学

消化器病学

医療関心事

• 食道、胃、大腸の早期腫瘍の内視鏡治療

• 内視鏡による肥満治療（胃バルーンおよび胃ボトックスの応用）

• ERCP

• 胃食道逆流症（GERD）

• 慢性肝疾患とウイルス性肝炎

• 炎症性腸疾患（クローン病および潰瘍性大腸炎）

• 食道運動障害（食道マノメトリー、食道pHプローブテスト）

• 内視鏡超音波検査

学歴

• イスタンブール大学、医学部 - 2000

• ゾングルダク・カラエルマス大学医学部、内科 - 2005

• アンカラ教育研究病院、消化器病学クリニック - 2012

• ジョンズ・ホプキンス大学、米国 - バリアトリー内視鏡/高度内視鏡センター - 2018

• ハリム大学、大韓民国 - 高度内視鏡センター - 2019

経験

• カラブック・イェニケ州立病院 - 内科専門医 - 主治医

• エルデック軍病院、内科クリニック - 内科専門医

• アンカラ州キジルカハマム州立病院 - 内科専門医

• アンカラ教育研究病院、消化器病学クリニック

• シート州立病院 - 消化器病学専門医

• チャナッカレ州立病院 - 消化器病学専門医 / 准教授

• イスタンブール・ビリム大学医学部、シシュリ・フローレンス・ナイチンゲール病院、消化器病学 / 肝移植ユニット - 消化器病学専門医 / 准教授

• カディキョイ・フローレンス・ナイチンゲール病院、消化器病学 - 消化器病学専門医 / 教授

100以上の国際論文、3つの書籍チャプターの著者、20の国内出版物、100以上の学会論文

メンバーシップ

• トルコ消化器病学会

• HEBİPA

• トルコ医師協会

• トルコ消化器内視鏡学会（TSGE）

• トルコ肝研究学会

Areas of Interests

• Surgical treatment of thyroid, parathyroid gland diseases and cancers
• Surgical treatment of adrenal gland (adrenal gland) diseases and cancers
• Laparoscopic & Robotic Surgery

Education:

• Galatasaray High School (1989-1997)
• Istanbul University, Istanbul Faculty of Medicine, Medical Education (1997-2003)
• Istanbul University, Istanbul Faculty of Medicine, Department of General Surgery, Specialization in General Surgery (2003-2009)
• Cleveland Clinic, Endocrine and Metabolism Institute, Center for Endocrine Surgery, USA, Research Fellowship (2014)
• Karolinska University Hospital, Department of Surgery, Division of Endocrine Surgery and Sarcoma Unit, Sweden, Endocrine Surgery Clinical Fellowship (2015)
• Ottawa University, Faculty of Medicine, Children's Hospital of Eastern Ontario, Apoptosis Research Center (ARC), Canada, Translational Medicine Clinical Research Fellowship (2016-2017)

Experience:

• LIV Hospital Ulus & LIV Hospital Vadistanbul
• Bakirkoy Dr. Sadi Konuk Training and Research Hospital (2012-2021)
• Ottawa University, Faculty of Medicine, Canada (2016)
• Karonlinska University Hospital, Sweden (2015)
• Cleveland Clinic, OH, USA. (2014)
• Iğdır State Hospital (2009-2012)

Memberships

• Endocrine Surgery Association, Member of the Board and Secretary General of the Association
• Dialogue Society in Endocrinology, Member
• Endoscopic Laparoscopic Surgery Association, Member
• Turkish Surgery Association, Member
• European Society of Endocrine Surgery(ESES), Member
• European Association for Endoscopic Surgery (EAES), Member
• Society of American Gastrointestinal and Endoscopic Surgeons (SAGES), Member
• Clinical Robotic Surgery Association (CRSA), Member
• American Association of Endocrine Surgeons (AAES), Member
• American College of Surgeons (ACS), Member