Associate Professor Ümit Özçelik, M.D.

Career Summary:

• Ankara University School of Medicine, 1996-2002
• Başkent University School of Medicine, Department of General Surgery, 2003-2009
• Yüksekova State Hospital, 2009-2011
• Van 6th Regiment Command, Özalp 2nd Border Battalion, 2011-2012
• Başkent University School of Medicine, Department of General Surgery, Istanbul Health, Practice and Research Center Hospital, 2012-2018
• İstanbul Aydın University School of Medicine, Department of General Surgery, Medical Park Florya Hospital, 2018-2022
• Altınbaş University School of Medicine, Department of General Surgery, Medical Park Bahçelievler Hospital, 2022-2023
• Lokman Hekim University School of Medicine, Department of General Surgery, Lokman Hekim University Ankara Hospital, 2023-2026
• Yeditepe University Koşuyolu Hospital, 2026-

Fields of Study:

• Liver transplantation
• Kidney transplantation
• Hepatobiliary surgery
• Pancreatic surgery

Book Chapters:

• Surgical Complications After Kidney Transplant, M. Haberal, F Boyvat, A Akdur, M Kirnap, U Ozcelik, FY Karakayali, Transplantation Surgery, 2021, sayfa:181-194, Springer, Cham

Professional Publications:

1. Original articles published or accepted for publication in journals indexed by the indexes accepted by YÖK (Council of Higher Education) for associate professorship applications (SCI & SCI expanded)

• 1.1. Role of donor age and acute rejection episodes on long-term graft survival in cadaveric kidney transplantations. Emiroğlu R, Yagmurdur MC, Karakayali F, Haberal C, Ozcelik U, Colak T, Haberal M. Transplant Proc. 2005 Sep;37(7):2954-6.
• 1.2. Influence of synthetic mesh on ilioinguinal nerve motor conduction and chronic groin pain after inguinal herniorrhaphy: a prospective randomized clinical study. Karakayali F, Karatas M, Ozcelik U, Ekici Y, Basaran O, Moray G, Haberal M. Int Surg. 2007 Nov-Dec;92(6):344-50.
• 1.3. Liver transplantation for biliary atresia. Karakayali H, Sevmis S, Ozcelik U, Ozcay F, Moray G, Torgay A, Arslan G, Haberal M. Transplant Proc. 2008 Jan-Feb;40(1):231-3.
• 1.4. Are there any differences between age groups regarding colorectal surgery in elderly patients? Bircan HY, Koc B, Ozcelik U, Adas G, Karahan S, Demirag A.  BMC Surg. 2014 Jul 15;14(1):44. doi: 10.1186/1471-2482-14-44.
• 1.5. LigaSure® versus Clamp Tie Technique for Thyroid Surgery; Decreased Operative Time versus Increased Inflammatory Effect: a prospective randomized study. Bircan HY, Inal A, Ozcelik U, Koc B, Demirag A, Moray G, Kemik O. Eur Rev Med Pharmacol Sci. 2014 Jul;18(14):1997-2005.
• 1.6. Analysis of Panel Reactive Antibodies in Renal Transplant Recipients Detected by Luminex: A Single-Center Experience. İnal A, Özçelik Ü, Ogan Uyanık E, Külah E, Demirağ A. Exp Clin Transplant. 2016 Aug;14(4):401-4. doi: 10.6002/ect.2014.0285. Epub 2015 Oct 30.
• 1.7. Development of an Information Model for Kidney Transplant Wait List. Bircan HY, Özçelik Ü, Uysal N, Demirağ A, Haberal M. Exp Clin Transplant. 2015 Nov;13 Suppl 3:58-61. 
• 1.8. The Outcomes of Ultralow Anterior Resection or an Abdominoperineal Pull-Through Resection     and Coloanal Anastomosis for Radiation-Induced Recto-Vaginal Fistula Patients. Karakayali FY, Tezcaner T, Ozcelik U, Moray G. J Gastrointest Surg. 2016 May;20(5):994-1001. doi: 10.1007/s11605-015-3040-8. Epub 2015 Dec 1.
• 1.9. Effect of Topical Platelet-Rich Plasma on Burn Healing after Partial-Thickness Burn Injury.  Ozcelik U, Ekici Y, Bircan HY, Aydogan C, Turkoglu S, Ozen O, Moray G, Haberal M.  Med Sci Monit 2016 Jun 5;22:1903-1909.
• 1.10. Influence of Various Living Donor Kidney Measurements in Relation to Recipient Body Measurements on Posttransplant Allograft Functional Outcomes. Kulah E, Ozcelik U, Cevik H, Bircan HY, Y Karakayali F. Exp Clin Transplant. 2018 (3):266-273. doi: 10.6002/ect.2015.0353
• 1.11. Surgical Complications after Kidney Transplantation.  Haberal M, Boyvat F, Akdur A, Kırnap M, Özçelik Ü, Yarbuğ Karakayali F. Exp Clin Transplant. 2016 Dec;14(6):587-595. 
• 1.12.  Increased Mortality Among Renal Transplant Patients with Invasive Pulmonary Aspergillus Infection.  Balcan B, Ozcelik U, Ugurlu AO, Aydin M, Nalcaci S, Yarbug Karakayali F.  Prog Transplant. 2018 Dec;28(4):349-353. doi: 10.1177/1526924818800044. Epub 2018 Sep 20.
• 1.13. Renal Hilus Ligation with Single Stapler in Laparoscopic Donor Nephrectomy.  Tokaç M, Eren E, Özçelik Ü, Şahin T, Dinçkan A. Transplant Proc. 2019 Sep;51(7):2225-2227. doi: 10.1016/j.transproceed.2019.02.045.
• 1.14. Renal Transplantation in Patients With Atypical Hemolytic Uremic Syndrome: A Single Center Experience. Alpay N, Ozçelik U. Transplant Proc. 2019 Sep;51(7):2295-2297. doi: 10.1016/j.transproceed.2019.01.157.
• 1.15. Renal Transplantation in High Immunological Risk Patients: A Single-Center Experience  Alpay N, Özçelik Ü, Eren E, Uslu B. Transplant Proc. 2019 Sep;51(7):2298-2301. doi: 10.1016/j.transproceed.2019.04.075. 
• 1.16. Correlation Between the Mayo Adhesive Probability Score and the Operative Time in Laparoscopic Donor Nephrectomy. Özçelik Ü, Eren E, Urut DU, Talih T, Tokaç M, Dinçkan A. Transplant Proc. 2021 Apr;53(3):793-798. doi: 10.1016/j.transproceed.2020.10.013. Epub 2020 Dec 4. PMID: 33272653.
• 1.17. Results of Using the Cystic Duct for Reconstruction of One of the Multiple Bile Ducts in Right Lobe Living Donor Liver Transplantation. Özçelik Ü, Eren E, Tokaç M, Şahin T, Parlak H, Dinçkan A.  Transplant Proc. 2021 Jul 5:S0041-1345(21)00411-5. doi: 10.1016/j.transproceed.2021.06.005. Epub ahead of print. PMID: 34233848.
• 1.18. Comparison of bipolar vascular sealing and conventional back-table dissection in terms of post-renal transplant drainage and back-table preparation times E. Eren, M. Tokac, U. Ozcelik, T. Sahin, G. Tellioglu, C. Peksen, A. Dinckan Eur Rev Med Pharmacol Sci. 2023 Jul;27(13):6223-6228. doi: 10.26355/eurrev_202307_32981.
• 1.19. Evaluation of Transplanted Kidneys and Comparison with Healthy Volunteers and Kidney Donors with Diffusion-Weighted Magnetic Resonance Imaging: Initial Experience.  Özçelik Ü,  Çevik H, Bircan HY, Yarbuğ Karakayali F, Işıklar İ, Haberal M. Exp Clin Transplant. 2024 Nov;22(11):850-858. doi: 10.6002/ect.2016.0341. Epub 2017 Mar 22. 
• 1.20. Syringaldehyde attenuates deltamethrin-induced hepatic tissue injury by modulating oxidative stress, inflammation, and apoptosis via the Nrf2/HO-1 pathway. Pekmez M, Ozcelik U, Demirel HH, Ince S. Tissue Cell. 2026 Mar 18;101:103479. doi: 10.1016/j.tice.2026.103479. Epub ahead of print. PMID: 41865487.

2. Other studies published or accepted for publication in journals indexed by indexes accepted by YÖK (Council of Higher Education) for associate professorship applications (case presentation, technical note, letter to the editor, abstract, review, decision analysis, and full-text paper published in indexed conference proceedings)

• 2.1. Rectal diverticulitis mimicking rectal carcinoma with intestinal obstruction: Case report. Ozcelik U, Bircan HY, Eren E, Demiralay E, Isiklar I, Demirag A, Moray G. Turk J Gastroenterol. 2015; 26:60-62. DOI: 10.5152/tjg.2015.4521
• 2.2. Use of biological prosthesis in a patient with kidney and pancreas transplant and a giant incisional hernia: case report. Ozcelik U, Cevik H, Bircan HY, Demirag A. Exp Clin Transplant. 2015 Apr; 13 Suppl 1:231-4. 
• 2.3. Delaying Renal Transplant after Radical Prostatectomy for Low-Risk Prostate Cancer. Özçelik Ü, Bircan HY, Karakayalı F, Moray G, Demirağ A. Exp Clin Transplant. 2015 Nov;13 Suppl 3:74-6.
• 2.4. Multiple Brain Abscesses Due to Phialemonium in a Renal Transplant Recipient: First Case Report in the Literature. Aydın M, Özçelik Ü, Çevik H, Çınar Ö, Evren E, Demirağ A. Exp Clin Transplant. 2015 Nov;13 Suppl 3:77-80.
• 2.5.  Reconstruction of Traumatic External İliac Artery Dissection Due to Vascular Clamping Kırnap M, Özçelik Ü, Akdur A, Ayvazoğlu Soy EH, Işıklar İ, Yarbuğ Karakayalı F, Moray G, Haberal M. Exp Clin Transplant. 2025 Feb;23(2):154-157. doi: 10.6002/ect.2016.0091. Epub 2017 Oct 31.

3. Other studies published or accepted for publication in journals indexed in relevant international field indexes, excluding those indexed by YÖK (Council of Higher Education) for associate professorship applications (case presentation, technical note, letter to the editor, abstract, review, case analysis)

• 3.1. Jejunal torsion around the right ureter presenting as postoperative bowel obstruction: a case report. Bircan H, Koc B, Ozcelik U, Demirag A. J Med Case Rep. 2014 Jun 19;8:209.
• 3.2. Laparoscopic treatment of gallstone ileus. Bircan HY, Koc B, Ozcelik U, Kemik O, Demirag A. Clin Med Insights Case Rep. 2014 Aug 6;7:75-7. 
• 3.3. Cutaneous necrosis as a result of isosulphane blue injection in mammarian sentinel lymph node mapping: report of two cases. Bircan HY, Ozcelik U, Koc B, Kemik O, Demirag A. Clin Med Insights Case Rep. 2014 Aug 11;7:79-81
• 3.4. Massive alimentary tract bleeding due to cytomegalovirus infection in an elderly patient.  Koc B, Bircan HY, Altaner S, Cinar O, Ozcelik U, Yavuz A, Kemik O.  Infect Dis Rep. 2014 Sep 22;6(3):5512.
• 3.5. Right lobe liver transplantation for Wilson’s Disease from heterozygote donor: Case report Ozcelik U, Eren E, Tokaç M, Dinçkan A. Transplantation Reports, 2019-12-01, Volume 4, Issue 4, Article 100023

4. Original articles published or accepted for publication in national peer-reviewed journals.

• 4.1. Böbrek Naklinde Sitomegalovirüs Enfeksiyonu için Düşük Doz Valgansiklovir Profilaksisinin Etkinliği Ümit Özçelik, Nadir Alpay, Eryiğit Eren, Bora Uslu, Ahmet Cem Yardımcı Med Bull Haseki. 2020;58:27-32. DOI: 10.4274/haseki.galenos.2019.5251
• 4.2.  Karaciğer nakli sonrası hepatit B nüksünün önlenmesinde kısa süreli düşük doz hepatit B immünglobulini ile nükleotid analoğu kombinasyonunun etkinliği Ümit Özçelik, Eryiğit Eren, Tutkun Talih, Ömer V. Özozan, Fatih Ensaroğlu Bozok Med J 2020;10(1):211-16. DOI: 10.16919/bozoktip.661595
• 4.3.   A Comparison of Actual Graft Weight and Estimated Graft Volume Calculated with New Software Used for Anatomical and Volumetric Analysis of the Liver with Computed Tomography in Living Liver Donors Ümit Özçelik, Eryiğit Eren, Yıldıray Tutpınar, Devrim Ulaş Urut, Mehmet Tokaç, Ayhan Dinçkan Experimed 2021; 11(2):96-101. DOI: 10.26650/experimed.2021.942836

5. Other studies published or accepted for publication in national peer-reviewed journals (case presentation, technical note, letter to the editor, abstract, review, case analysis)

• 5.1. Tail gut kisti-Retrorektal kitlenin nadir bir sebebi: Vaka takdimi Ü. Özçelik, H.Y. Bircan, H. Çevik, Ş. Altaner, A. Demirağ Acta Oncologica Turcica 2015. Cilt:48 Sayı:2 Sayfa:86-89 doi:10.5505/aot.2015.03016

Actively Performed Professional Duties:

• Head Specialist at Yeditepe University Kidney Transplant Center
• Assistant Head Specialist at Yeditepe University Liver Transplant Center

Certificates:

• Selim Anorectal Diseases Course, Turkish Society of Colon and Rectum Surgery, Istanbul, December 17, 2016 (National) 
• Training Program on the Istanbul Protocol, Practitioner Training, Van, November 6-7, 2009 (International)
• Burn Course, Ankara Surgical Society, Başkent University, Ankara, April 11, 2009 (National)
• Gazi Hernia Days, Hernia Course, Gazi University, Ankara, October 18-19, 2008 (National)
• Innovations in Breast Cancer Diagnosis and Treatment Course, Ankara Breast Diseases Society, Ankara, March 22, 2008 (National)
• Optimising immunosuppression for improved long-term outcomes in renal transplantation, Hospital Clinic de Barcelona, June 4-6, 2014 Barcelona/Spain (International)

Memberships:

• Turkish Surgical Association
• Istanbul Medical Chamber
• The Transplantation Society
• The Middle East Society for Organ Transplantation
• The Turkic World Transplantation Society
• International College of Surgeons
• Turkish Society of Colon and Rectal Surgery