Prof. Dr. Onur Bayraktar

Formation et spécialisation

1999–2005 — Études de médecine, faculté Cerrahpaşa de l’Université d’Istanbul

2005–2010 — Spécialisation en chirurgie générale, faculté Cerrahpaşa de l’Université d’Istanbul

Expérience professionnelle

Chirurgie générale, Liv Hospital Vadistanbul

2021–2025 — Hôpital Memorial Şişli

Hôpital Istanbul Florence Nightingale, Université Bilim

2014–2018 — Hôpital Atakent de l’Université Acıbadem

2012–2013 — Hôpital 29 Mayıs

2011–2012 — Hôpital public de Siirt Kurtalan

Domaines de spécialisation

Reflux, hernie hiatale et maladies digestives

Chirurgie des cancers gastriques et colorectaux ; maladies inflammatoires intestinales

Chirurgie robotique et laparoscopique

Proctologie : hémorroïdes, fissure anale, fistule, abcès et maladie pilonidale

Hernies de la paroi abdominale et hernies inguinales

Chirurgie de cytoréduction et HIPEC

Affiliations professionnelles

Association médicale turque

Société turque de chirurgie

Société turque de chirurgie colique et rectale

European Society of Coloproctology

Prix et distinctions

2015 — Premier prix de présentation vidéo, Clinical Robotic Surgery Association Worldwide Congress

2015 — Troisième prix de présentation vidéo, XVe Congrès turc de chirurgie colique et rectale

2017 — Prix de communication orale, 22e Congrès turc de cancérologie

Publications scientifiques

Yildirim Y, Arslan C, Bayraktar O, Bayraktar IE. Martius flap in recurrent rectovaginal fistula: a video vignette. Int J Colorectal Dis. 2025 Oct 16;40(1):215. doi: 10.1007/s00384-025-05004-7.

Ozben V, Aytac E, Atasoy D, Erenler Bayraktar I, Bayraktar O, Sapci I, Baca B, Karahasanoglu T, Hamzaoglu I. Totally robotic complete mesocolic excision for right-sided colon cancer. J Robot Surg. 2019 Feb;13(1):107-114. doi: 10.1007/s11701-018-0817-2. Epub 2018 May 17.

Konduk BT, Bayraktar O. Efficacy and safety of endoscopic retrograde cholangiopancreatography in pregnancy: A high-volume study with long-term follow-up. Turk J Gastroenterol. 2019 Sep;30(9):811-816. doi: 10.5152/tjg.2019.18799.

Karakayali F, Arslan C, Bisgin T, Erenler Bayraktar I, Bayraktar O, Canda AE. Can neoadjuvant chemoradiotherapy be omitted in cT2N+ and cT3 mid-rectal cancer: Protocol for a prospective, observational, cohort study (CANO). PLoS One. 2025 Nov 5;20(11):e0321819. doi: 10.1371/journal.pone.0321819. eCollection 2025.

Yildirim Y, Bayraktar O, Erenler Bayraktar I. Endoscopic Identification of a Hidden Internal Opening Using Video-Assisted Anal Fistula Treatment (VAAFT). Cureus. 2025 Sep 21;17(9):e92821. doi: 10.7759/cureus.92821. eCollection 2025 Sep.

Aghayeva A, Baca B, Atasoy D, Bayraktar O, Ozben V, Erguner I, Hamzaoglu I, Karahasanoglu T. Robotic Complete Mesocolic Excision for Splenic Flexure of Colon Cancer. Dis Colon Rectum. 2016 Nov;59(11):1098. doi: 10.1097/DCR.0000000000000691.

Ozben V, Baca B, Atasoy D, Bayraktar O, Aghayeva A, Cengiz TB, Erguner I, Karahasanoglu T, Hamzaoglu I. Robotic complete mesocolic excision for right-sided colon cancer. Surg Endosc. 2016 Oct;30(10):4624-5. doi: 10.1007/s00464-016-4786-0. Epub 2016 Feb 22.

Atasoy D, Aghayeva A, Bayraktar O, Ozben V, Baca B, Hamzaoglu I, Karahasanoglu T. Vascular High Ligation and Embryological Dissection in Laparoscopic Restorative Proctocolectomy for Ulcerative Colitis. J Laparoendosc Adv Surg Tech A. 2017 Jan;27(1):33-35. doi: 10.1089/lap.2016.0364. Epub 2016 Sep 14.

Arslan NC, Bilgin IA, Gulcu B, Bayraktar B, Eray IC, Bisgin T, Yildirim Y, Aghayeva A, Aydin I, Bilgic C, Boluk S, Kurtul CI, Ramoglu N, Yildirim A, Bayraktar IE, Bayraktar O. Does laser treatment affect outcome in pilonidal sinus disease? Long-term multicenter retrospective analysis of pit-picking alone vs. pit-picking with laser. Tech Coloproctol. 2026 May 13;30(1):103. doi: 10.1007/s10151-026-03314-8.

Atici SD, Yildirim Y, Canda AE, Terzi MC, Arslan C, Bayraktar İE, Bayraktar O, Bisgin T. Complex ventral hernia repair using botulinum toxin with combination of Fasciotens® after colorectal surgery: A video vignette. Colorectal Dis. 2026 Jan;28(1):e70374. doi: 10.1111/codi.70374.

Atasoy D, Aytac E, Ozben V, Bayraktar O, Erenler Bayraktar I, Aghayeva A, Baca B, Hamzaoglu I, Karahasanoglu T. Robotic Versus Laparoscopic Stapler Use for Rectal Transection in Robotic Surgery for Cancer. J Laparoendosc Adv Surg Tech A. 2018 May;28(5):501-505. doi: 10.1089/lap.2017.0545. Epub 2018 Jan 23.

Bayraktar O, Bayraktar B. The Feasibility of Conventional Forward-viewing Endoscope for Endoscopic Retrograde Cholangiopancreatography in Patients With Altered Gastrointestinal Anatomy. Surg Laparosc Endosc Percutan Tech. 2019 Jun;29(3):216-219. doi: 10.1097/SLE.0000000000000636.

Aghayeva A, Bayraktar O, Atasoy D, Ozben V, Baca B. Excision of a Rectal Gastrointestinal Stromal Tumor Using the Transanal Minimal Invasive Surgery Technique. Dis Colon Rectum. 2015 Nov;58(11):1108. doi: 10.1097/DCR.0000000000000464.

Atasoy D, Aghayeva A, Sapcı İ, Bayraktar O, Cengiz TB, Baca B. Effects of prior abdominal surgery on laparoscopic cholecystectomy. Turk J Surg. 2018 Aug 28;34(3):217-220. doi: 10.5152/turkjsurg.2017.3930.

Bayraktar B, Ozemir IA, Kefeli U, Demiral G, Sagiroğlu J, Bayraktar O, Adali G, Ozcelik A, Tortum OB. Colorectal stenting for palliation and as a bridge to surgery: A 5-year follow-up study. World J Gastroenterol. 2015 Aug 21;21(31):9373-9. doi: 10.3748/wjg.v21.i31.9373.

Bayraktar O, Bayraktar B, Atasoy D, Erenler I, Ozdemir IA, Boluk S, Bayraktar OU, Bayraktar A, Tortum OB, Yigitbasi R. Covered self-expandable metallic stents could be used successfully in the palliation of malignant cervical esophageal strictures: preliminary report. Surg Laparosc Endosc Percutan Tech. 2013 Apr;23(2):e41-4. doi: 10.1097/SLE.0b013e318275b35f.

Bayraktar O, Aytaç E, Özben V, Atasoy D, Bilgin İA, Erenler Bayraktar İ, Baca B, Hamzaoğlu İ, Karahasanoğlu T. Does Robot Overcome Obesity-related Limitations of Minimally Invasive Rectal Surgery for Cancer? Surg Laparosc Endosc Percutan Tech. 2018 Feb;28(1):e8-e11. doi: 10.1097/SLE.0000000000000500.

Ozben V, Cengiz TB, Atasoy D, Bayraktar O, Aghayeva A, Erguner I, Baca B, Hamzaoglu I, Karahasanoglu T. Is da Vinci Xi Better than da Vinci Si in Robotic Rectal Cancer Surgery? Comparison of the 2 Generations of da Vinci Systems. Surg Laparosc Endosc Percutan Tech. 2016 Oct;26(5):417-423. doi: 10.1097/SLE.0000000000000320.

Karagöz Avci S, Yüceyar S, Aytaç E, Bayraktar O, Erenler I, Ustün H, Uzun H, Ertürk S. Comparison of classical surgery and sutureless repair with DuraSeal or fibrin glue for duodenal perforation in rats. Ulus Travma Acil Cerrahi Derg. 2011 Jan;17(1):9-13. doi: 10.5505/tjtes.2011.13914.

Ozemir IA, Bayraktar B, Bayraktar O, Tosun S, Bilgic C, Demiral G, Ozturk E, Yigitbasi R, Alimoglu O. Single-site multiport combined splenectomy and cholecystectomy with conventional laparoscopic instruments: Case series and review of literature. Int J Surg Case Rep. 2016;19:41-6. doi: 10.1016/j.ijscr.2015.12.018. Epub 2015 Dec 17.

Bayraktar B, Bayraktar O, Ozemir IA, Kizilkilic E, Ozturk E, Yigitbasi R. Comparison of two minimal invasive techniques of splenectomy: Standard laparoscopy versus transumbilical multiport single-site laparoscopy with conventional instruments. J Minim Access Surg. 2015 Apr-Jun;11(2):143-8. doi: 10.4103/0972-9941.137756.

Bayraktar Barış, Yılmaz Erkan, Bayraktar Onur, Apaydın Bedii Berat, Erenler Ergüner İlknur, Kayabaşı Bayram , Özçelik Alp, Eren Bülent. Distribution of HLA antigens in breast cancer. Bratisl Lek Listy. 2012;113(6):372-375. Doi: 10.4149/BLL_2012_084

Bayraktar Barış, Demiral Gökhan, Özemir İbrahim Ali, Bayraktar Onur, Yılmabaşar Mehmet Gökçe, Bölük Salih. Bilateral Giant Mediastinal Parathyroid Adenomas. Presented With Severe Hypercalcemia: Report of a Case. J Med Cases. 2014;5(3):167-170 Doi: 10.14740/jmc1686e.

Baca Bilgi, Aghayeva Afag, Özben Volkan, Bayraktar Onur, Atasoy Deniz, Ergüner İlknur, Karahasanoğlu Tayfun, Hamzaoğlu İsmail. Robotic total proctocolectomy for ulcerative colitis - a video vignette. Colorectal Dis. 2015 Aug;17(8):736. doi: 10.1111/codi.13019.

Özben Volkan, Cengiz Turgut Bora, Bayraktar Onur, Aghayeva Afag, Atasoy Deniz, Şisman Gürhan, Baca Bilgi. Identification of mesenteric lymph nodes in robotic complete mesocolic excision by near-infrared fluorescence imaging. Tech Coloproctol. 2016 Mar;20(3):195-6. doi: 10.1007/s10151-015-1413-3.

Atasoy Deniz, Baca Bilgi, Özben Volkan, Bayraktar Onur, Aghayeva Afag, Aytaç Erman, Karahasanoğlu Tayfun, Hamzaoğlu İsmail. Vascular high ligation and embryological plane dissection in laparoscopic restorative proctocolectomy for ulcerative colitis - a video vignette. Colorectal Dis. 2016 Feb;18(2):218-219. doi: 10.1111/codi.13213.

Cengiz Turgut Bora, Aghayeva Afag, Atasoy Deniz, Sapcı İpek, Bayraktar Onur , Baca Bilgi . Robotic TAPP repair of incarcerated femoral hernia with utilization of indocyanine green dye - a video vignette. Colorectal Dis. 2017 Aug;19(8):786. doi: 10.1111/codi.13787.

Atasoy Deniz, Aghayeva Afag, Özben Volkan, Bayraktar Onur, Hamzaoğlu İsmail, Baca Bilgi. Mini-laparoscopic versus traditional laparoscopic cholecystectomy: A preliminary study. Laparosc Endosc Surg Sci. 2017; 24(4): 117-121. 10.14744/less.2017.37450

Atasoy Deniz , Aghayeva Afag , Bayraktar Onur , Pirinç Neslihan , Aytaç Erman, Bilgi Baca, Karahasanoğlu Tayfun , Hamzaoğlu İsmail . Robotic ventral mesh rectopexy technique for rectal intussusception with rectocele - a video vignette. Colorectal Dis. 2017 Oct;19(10):947. doi: 10.1111/codi.13847.

Demiral Gökhan , Özçelik Alp, Özemir İbrahim Ali , Bayraktar Onur , Bölük Sümeyra, Karaca Fatih Can, Bayraktar Barış . Comparison of two laparoscopic techniques for detecting the accessory spleen: standard versus transumblical multiport single-site laparoscopy. Biomedical Research- India 2017:28(14):6504-09.

Aghayeva Afag , Atasoy Deniz , Bayraktar Onur , Cengiz Turgut Bora , Baghaki Semih , Baca Bilgi , Hamzaoğlu İsmail , Karahasanoğlu Tayfun . V-Y advancement flap reconstruction for anal stricture - a video vignette. Colorectal Dis. 2018 Jan;20(1):78-79. doi: 10.1111/codi.13931.

Demiral Gökhan , Bayraktar Onur, Bölük Salih, Özçelik Alp, Özemir İbrahim Ali Bayraktar Barış. Covered self-expandable metallic stents in benign pyloric obstruction: long term results. Biomedical Research 2018; 29 (11): 2378-2384. DOI: 10.4066/biomedicalresearch.56-17-3282.

Bayraktar Onur, Bayraktar Barış, Erenler İlknur. Can Oxidative Stress Induced by Obstructive Jaundice be Improved by Iloprost? An Experimental Study in Rats. International Journal of Scientific Research and Management (IJSRM).2019;7(3):132-138. doi: 10.18535/ijsrm/v7i3.mp01.

Ali Yalcinkaya, Ahmet Yalcinkaya, Bengi Balci, Can Keskin, Ibrahim Erkan, Alp Yildiz, Erdinc Kamer, Sezai Leventoglu, RIFT TURKEY Study Collaboration. Nationwide prospective audit for the evaluation of appendicitis risk prediction models in adults: right iliac fossa treatment (RIFT)—Turkey. BJS Open, 2024, zrae120. DOI: 10.1093/bjsopen/zrae120

Arslan Çiğdem, Yıldırım Yasemin, Koçak Mehmet, Bişgin Tayfun, Erenler Bayraktar İlknur, Bayraktar Onur. The 5-year outcomes and predictors of healing in chronic anal fissure treated with botulinum toxin: a retrospective analysis of 199 cases. Tech Coloproctol. 2025 May 25;29(1):122.

Bayraktar Onur, Özçelik Abdullah Alp, Öktemgil Ahmet Ragıp, Bayraktar Barış. Intragastric balloon therapy for obesity: Is it safe and effective? Arch Clin Exp Med 2019;4(1):25-28. doi:10.25000/acem.477680.

Bayraktar Onur, Esen Eren, Erenler İlknur, Aytaç Erman, Bilgin İsmail Ahmet, Baca Bilgi, Güngör Mete, Karahasanoğlu Tayfun, Hamzaoğlu İsmail. Transvaginal Specimen Extraction in Minimally Invasive Colorectal Resections: Initial Experience of a Tertiary Referral Hospital. ACU Sağlık Bil Derg 2019; 10(2):231-235. Doi: 10.31067/0.2019.130