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Dr. Specialist Surgeon Rafail Ibayev is an expert in advanced gastrointestinal surgery. He specializes in both laparoscopic and open procedures for diseases of the stomach, intestine, and rectum. Dr. Ibayev is a recognized leader in obesity and metabolic surgery. He has extensive experience in sleeve gastrectomy, gastric bypass, and gastric balloon procedures. His patients achieve high success rates in weight management and metabolic health.

Dr. Ibayev is known for his work in minimally invasive surgery. He performs a wide range of laparoscopic operations that help patients recover faster and with less scarring. He is also skilled in endocrine and breast surgery, including advanced oncoplastic techniques for both benign and malignant conditions. As a gastrointestinal cancer specialist, he performs complex surgeries for liver, stomach, and colorectal tumors. He provides modern and effective oncological care.

Dr. Ibayev is highly trained in anti-reflux surgery, treatment of digestive disorders, endoscopic procedures, hernia repair, splenectomy, and proctologic surgeries. He is committed to patient-centered care and long-term health outcomes.

Dr. Jaydeep Palep is a bariatric and upper GI surgeon with 17 years of experience. He specializes in minimally invasive and robotic weight loss surgeries. Dr. Palep is one of the first surgeons in India trained in Banded Bypass, Banded Sleeve Gastrectomy, and Mini Gastric Bypass. He has also received advanced training in Robotic GI Surgery in Italy and the USA.

Dr. Palep’s bariatric practice is certified as a Center of Excellence by the International Excellence Foundation (IEF). His practice has a morbidity rate of just 1%, which matches global standards. More than 90% of his diabetic patients stop using insulin and oral medications after surgery. He has published many articles in international journals and is invited to speak at conferences around the world.

Medical Interests and Activities 

Hepatic Cirrhosis and Portal Hypertension 

Hepatic Cancer 

Viral Hepatitides (Chronic Hepatitis B, C and Delta Infections) 

Alcoholic Chronic Liver Disease 

Non-Alcoholic Fatty Liver Disease 

Stomach and Duodenal Ulcer 

Gastrointestinal Hemorrhage (Ulcer and Varicose Vein Bleeding) 

Functional Digestive System Disorders (Irritable Bowel Syndrome, Functional Intestinal Obstruction and Diarrhea...) 

Inflammatory Bowel Diseases (Ulcerative Colitis, Crohn’s Disease) 

Malabsorption Syndromes (Celiac Disease and Alike) 

Gastrointestinal Tract Malignancies

Education and Experience 

Liv Hospital, Ulus, Gastroenterohepatology Department (2013 ...) 

Associate Professor of Medicine, Obligatory Service at Gastroenterology, Şanlıurfa Training and Research Hospital (2010 - 2012) 

Subspecialty in Gastroenterohepatology, Department of Gastroenterohepatology, İstanbul Faculty of Medicine, İstanbul University (2004 - 2010) 

Research Fellow, Physician, Department of Internal Diseases, 

İstanbul Faculty of Medicine, İstanbul University (1992 - 1998)

Memberships 

Turkish Association For The Study of The Liver 

Turkish Society of Gastroenterology 

Inflammatory Bowel Disease Society 

Internal Diseases Specialty Association

Education

Undergraduate Faculty of Medicine Trakya University 1995-2001
Medical Residency Internal Medicine Uludağ University 2001-2006
Subspecialty Gastroenterology Medeniyet University, Göztepe Training and Research Hospital / Gastroenterology Clinic 2007-2011

Experience

Internal Diseases
Assistant doctor Uludağ University Faculty of Medicine
Internal Diseases USA 2001-2006

Internal Diseases Specialist Şanlı Urfa Mehmet Akif İnan
Training and Research Hospital 2007
(Jul-Dec)

Gastroenterology Minor
Assistant Istanbul Medeniyet Universityniversitesi
Göztepe Training and Research Hospital
Gastroenterology Clinic 2007-2011
Gastroenterology Specialist Sivas Numune Hospital 2011-2013

Gastroenterology
Chief Resident Health Sciences University
Ümraniye Training and Research Hospital 2013-2017

Assoc. Dr.
Chief Assistant of Gastroenterology Clinic University of Health Sciences
Ümraniye Training and Research Hospital
2017-2021

Assoc. Dr.
Gastroenterology Clinic Administrative Responsible University of Health Sciences
Ümraniye Training and Research Hospital
2021-2024

Scientific Memberships
 

Turkish Society of Gastroenterology
Turkish Association of Liver Research
Gastrointestinal Endoscopy Society

Awards

Third Prize for Oral Presentation, 32nd National Gastroenterology Week, Turkish Gastroenterology Association, November 25-29, 2015. Turkish J. Gastroenterol 2015;26(suppl 1): Oral Presentation 03, S:11
Oral Presentation Third Prize. XVth Eurasian Congress of Gastroenterology and Surgery, 27 apr-01 May 2016, Antalya P:89

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

The doctor analyzes the patient's health condition, taking into account his physical, social and psychological characteristics. Selects the optimal treatment and monitors its implementation, and also ensures long-term monitoring of the patient's health. Organizes consultations with specialized specialists, refers for laboratory tests and diagnostic procedures, conducts preventive and explanatory work with the patient and his family.

The doctor treats such diseases as anaphylactic shock, arterial hypertension, ischemic heart disease, angina pectoris, chronic obstructive pulmonary disease. Also treats cystitis, gastritis and acute respiratory viral infection.

Prof. Filippini began his career in 1980 and has been teaching at the University of Chieti since the 1990s in the fields of General Surgery, Microsurgery, Reconstructive Surgery, Vascular Surgery, Orthopedics, and Gynecology. His primary focus is oncological surgery, particularly specializing in "The surgical treatment of locally advanced tumors and multi-organ resections." He has enriched his expertise by visiting prominent reference centers in the United States, including the Memorial Sloan Kettering Cancer Center in Manhattan, New York City. There, he delved into minimally invasive, laparoscopic, and microsurgical techniques under the guidance of esteemed mentors such as John Daly, Michele Gagner, and Murray Brennan. Additionally, in 2005, he further expanded his skills at the City of Hope Oncology Center in Los Angeles, focusing on robotic surgery in oncology.

In 1980, Prof. Filippini graduated in Medicine and Surgery from the G. D'Annunzio University of Chieti in Italy with honors, presenting an experimental thesis on lympho-venous anastomosis using microsurgical techniques. He completed his specialization in general surgery at the University of Pisa with distinction after five years. In 1990, he obtained another specialization in Plastic and Reconstructive Surgery from the University of Padua in Italy, where he maintained a stellar academic record.

Prof. Filippini has presented at numerous national and international conferences and authored over 100 scientific publications. Additionally, he has co-authored two monographs.