International Publications

1: Sezer TO, Yildirim H, Unalp O, Yoldas T, Firat O, Guler A, Ersin S, Hoscoskun C. A feasible technique for intraoperative endoscopy of gastrointestinal bleeding: clothed endoscopy. Am Surg. 2012 Sep;78(9):E439-40. PubMed PMID: 22964193.

2: Solak I, Sezer TO, Toz H, Tatar E, Isayev C, Firat O, Hoscoskun C. Spousal versus living unrelated renal transplantation: a retrospective analysis of allograft outcomes. Transplant Proc. 2012 Jul-Aug;44(6):1710-2. doi: 10.1016/j.transproceed.2012.05.069. PubMed PMID: 22841250.

3: Tatar E, Turan MN, Firat O, Sezer TO, Sozbilen M, Solak I, Toz H, Hoscoskun C.Use of kidney donors with hepatitis B, hepatitis C, or brain tumor: single-center experience. Transplant Proc. 2012 Jul-Aug;44(6):1601-3. doi:10.1016/j.transproceed.2012.04.028. PubMed PMID: 22841224. 

4: Solak I, Sezer TO, Toz H, Tatar E, Sozbilen M, Firat O, Hoscoskun C. What kind of changes occurred in clinical characteristics of deceased kidney donor recipients after national allocation system in Turkey? A single-center retrospective analysis. Transplant Proc. 2012 Jul-Aug;44(6):1598-600. doi: 10.1016/j.transproceed.2012.05.030. PubMed PMID: 22841223.

5: Yeniay L, Karaca CA, Calışkan C, Fırat O, Ersin SM, Akgün E. Abdominal cocoon  syndrome as a rare cause of mechanical bowel obstruction: report of two cases. Ulus Travma Acil Cerrahi Derg. 2011 Nov;17(6):557-60. doi: 10.5505/tjtes.2011.39018. PubMed PMID: 22290011.

6: Tatar E, Gungor O, Firat O, Kircelli F, Arda B, Harman M, Toz H, Hoscoskun C.  Differential diagnosis of an unusual pelvic mass in a renal transplant recipient: multidrug-resistant abdominopelvic tuberculosis. Ren Fail. 2011;33(10):1040-2. doi: 10.3109/0886022X.2011.618921. PubMed PMID: 22013939.

7: Makay O, Kaya T, Firat O, Sozbilen M, Caliskan C, Gezer G, Uyar M, Ersin S. ω-3 Fatty acids have no impact on serum lactate levels after major gastric cancer surgery. JPEN J Parenter Enteral Nutr. 2011 Jul;35(4):488-92. doi: 10.1177/0148607110386611. PubMed PMID: 21700966.

8: Caliskan C, Makay O, Firat O, Can Karaca A, Akgun E, Korkut MA. Foreign bodies in the rectum: an analysis of 30 patients. Surg Today. 2011 Jun;41(6):795-800. doi: 10.1007/s00595-009-4362-5. Epub 2011 May 28. PubMed PMID: 21626325.

9: Ersin S, Firat O, Sozbilen M. Reply to: re "Single incision laparoscopic cholecystectomy: is it more than a challenge?" ((2010)24:68-71). Surg Endosc. 2011 Oct;25(10):3476. doi: 10.1007/s00464-011-1733-y. PubMed PMID: 21556989.

10: Firat Ö, Çalişkan C, Karaca C, Sezak M, Özütemız Ö, Ersın S, Güler A. Coexistence of gastric cancer and gastrointestinal stromal tumor: report of two cases. Turk J Gastroenterol. 2010 Sep;21(3):302-4. PubMed PMID: 20931437.

11: Caliskan C, Guler N, Karaca C, Makay O, Firat O, Korkut MA. Negative prognostic factors in colorectal carcinoma: An analysis of 448 patients. Indian J Surg. 2010 Jun;72(3):243-8. doi: 10.1007/s12262-010-0052-1. Epub 2010 Aug 26. PubMed PMID: 23133256; PubMed Central PMCID: PMC3452660.

12: Caliskan C, Makay O, Firat O, Uğuz A, Akgün E, Korkut MA. McKittrick-Wheelock syndrome: is it really rare? Am J Emerg Med. 2010 Jan;28(1):105-6. doi: 10.1016/j.ajem.2009.09.001. PubMed PMID: 20006212.

13: Firat O, Yazici P, Makay O, Aydin A, Tuncyurek M, Ersin S, Guler A. Co-existence of gastrointestinal stromal tumors with malign epithelial tumors: a  report of two cases. Acta Chir Belg. 2009 Oct;109(5):629-32. PubMed PMID: 19994809.

14: Calişkan C, Denizli A, Makay O, Firat O, Tanyalcin T, Alkanat M, Korkut MA. Experimental comparison of meshes for rectal prolapse surgery. Eur Surg Res. 2009;43(3):310-4. doi: 10.1159/000235157. Epub 2009 Aug 13. PubMed PMID: 19684407.

15: Ersin S, Firat O, Sozbilen M. Single-incision laparoscopic cholecystectomy: is it more than a challenge? Surg Endosc. 2010 Jan;24(1):68-71. doi: 10.1007/s00464-009-0543-y. Epub 2009 Jun 17. PubMed PMID: 19533242.

16: Caliskan C, Firat O, Karaca AC, Akgun E. Steroid utilization in eosinophilic  jejunitis: beneficial or harmful? Langenbecks Arch Surg. 2010 Jan;395(1):99-101.  doi: 10.1007/s00423-009-0501-0. Epub 2009 May 6. PubMed PMID: 19418064.

17: Firat O, Mutlukoca N, Makay O, Yilmaz F, Omur O, Kitapcioglu G, Yuzer Y. Portal hyperfusion or hepatic venous congestion: which one affects Kupffer cell function more? Exp Clin Transplant. 2009 Mar;7(1):40-4. PubMed PMID: 19364311.

18: Firat O, Ozturk S, Akalin T, Coker A. Inflammatory myofibroblastic tumour. Can J Surg. 2009 Jun;52(3):E60-1. PubMed PMID: 19503649; PubMed Central PMCID: PMC2689747.

19: Firat O, Kirdok O, Makay O, Caliskan C, Yilmaz F, Ilgezdi S, Karabulut B, Coker A, Zeytunlu M. Can hyperbaric oxygenation decrease doxorubicin hepatotoxicity and improve regeneration in the injured liver? J Hepatobiliary Pancreat Surg. 2009;16(3):346-52. doi: 10.1007/s00534-009-0059-9. Epub 2009 Mar 17. PubMed PMID: 19288285.

20: Firat O, Guler A, Sozbilen M, Ersin S, Kaplan H. Gastric remnant cancer: an old problem with novel concerns. Langenbecks Arch Surg. 2009 Jan;394(1):93-7. doi: 10.1007/s00423-008-0382-7. Epub 2008 Jul 8. PubMed PMID: 18607624.

21: Turhan K, Makay O, Cakan A, Samancilar O, Firat O, Icoz G, Cagirici U. Traumatic diaphragmatic rupture: look to see. Eur J Cardiothorac Surg. 2008 Jun;33(6):1082-5. doi: 10.1016/j.ejcts.2008.01.029. Epub 2008 Mar 4. PubMed PMID: 18299201.

22: Firat O, Karaköse Y, Calişkan C, Makay O, Ozütemiz O, Korkut MA. Dieulafoy's  lesion of the anal canal: report of a case. Turk J Gastroenterol. 2007 Dec;18(4):265-7. PubMed PMID: 18080926.

23: Tuncyurek P, Sari M, Firat O, Mutaf I, Gulter C, Tunger A, Yuce G, Yilmaz M,  Makay O, Dayangac M, Ersin S. Does pharmaconutrition with L-arginine and/or alpha-tocopherol improve the gut barrier in bile duct ligated rats? Eur Surg Res. 2006;38(1):4-10. Epub 2006 Feb 13. PubMed PMID: 16479127.

24: Zeytunlu M, Korkut M, Akgün E, Firat O, Aynaci M, Içöz G, Kiliç M, Ersin S, Ozütemiz O. The comparative effects of calcium channel blockers in an experimental colitis model in rats. Turk J Gastroenterol. 2004 Dec;15(4):243-9. PubMed PMID: 16249979.

25: Zeytunlu M, Firat O, Nart D, Coker A, Yüzer Y, Tekeşin O, Ozütemiz O, Killi R. Solid and cystic papillary neoplasms of the pancreas: report of four cases. Turk J Gastroenterol. 2004 Sep;15(3):178-82. Review. PubMed PMID: 15492918.


Book Chapter Author

1. Mentioning M., Fırat Ö. Intraabdominal Infections and Surgical Treatment. Intraabdominal Infections 2009: Update. Editor: Ulusoy S. Scientific Medicine Publishing Post Graduate Education Series 5, 2009. Pg: 9 - 19.
2. Fırat Ö., Ersin S. Laparoscopic Interventions in General Surgery. Laparoscopic Surgery and Anesthesia. Editor: Karaman S. Ege University Faculty of Medicine - 106. Ege University Press, 2008. P: 47 - 72.
3. Mentioning M., Fırat Ö. Acute Appendicitis. "Clinical Gastroenterology and Atlas" Book. Editor: İlter T.
4. Speaking M., Fırat Ö. Surgical Treatments in Mesenteric Diseases. "Clinical Gastroenterology and Atlas" Book. Editor: İlter T.
5. Ersin S., Fırat Ö. Achalasia and its Surgical Treatment. "Clinical Gastroenterology and Atlas" Book. Editor: İlter T.
6. Ersin S., Fırat Ö. Surgical Treatment of Gastroesophageal Reflux Disease. "Clinical Gastroenterology and Atlas" Book. Editor: İlter T.
7. Kaplan H., Fırat Ö. Surgical Treatment in Upper Gastrointestinal System Bleeding Other Than Varicose Veins. "Clinical Gastroenterology and Atlas" Book. Editor: İlter T.
8. Ersin S., Fırat Ö. Paraesophageal Hernias and Surgical Treatment. "Clinical Gastroenterology and Atlas" Book. Editor: İlter T.
9. Fırat Ö., Osmanoğlu H. Anus and Rectum Diseases. "Clinical Gastroenterology and Atlas" Book. Editor: İlter T.

10. Güler A., ​​Fırat Ö. Surgical Treatment in Small Intestine Diseases. "Clinical Gastroenterology and Atlas" Book. Editor: İlter T.


International Journal Refereeing

1. Magazine: World Journal of Surgical Oncology, Author:  Fotiadis C.I. ve ark. Name of the study: Diffuse anorectal melanoma. Current diagnostic and treatment aspects. A case report. 

Year of evaluation: 2009

2. Magazine: Therapeutics and Clinical Risk Management. Author: O’Carroll S. Ve ark. Name of the study: Gastrointestinal Stromal Tumor (GIST) recurrence following surgery; clinical utility of imitanib treatment. 

Year of evaluation: 2010


1. ‘Travel Fellowship’ awards: Makay O., Firat O., Gokce G., Sapaz N., Yenisey C., Coker A. Omega – 3 fatty acids inhibit oxidative stress in a rat model of liver regeneration. 30th ESPEN Congress, The European Society for Clinical Nutrition and Metabolism. September 13 – 16th, 2008, Florence, Italy.

2. Selected (best five) work award: Fırat Ö., Makay Ö., Gökçe G., Yenisey Ç., Çoker A. Omega – 3 Fatty acids reduce oxidative stress in an experimental liver regeneration model. 6. Clinical Enteral Parenteral Nutrition Congress. 1 – 5 April 2009, Ankara.
3. Poster presentation, third prize: Kaya T., Makay Ö., Fırat Ö., Sözbilen M., Uyar M., Ersin S. The effect of omega - 3 fatty acids on blood lactic acid levels in patients undergoing gastric cancer surgery. 6. Clinical Enteral Parenteral Nutrition Congress. 1 – 5 April 2009, Ankara.