International Experience

• Training on the Use of Ultracision in Thyroid Surgery Liege, Belgium (2005)
• Laparoscopic Gastric Band and Laparoscopic Gastric By-pass Training in Morbid Obesity Salzburg, Austria (2007)
• Laparoscopic Colon Surgery Training Milano, Italy (2012)
• Laparoscopic Gastric By-pass and Redo Surgery Training Brugges, Belgium (2014)

Areas of Interest:

• Morbid Obesity Surgery
• Laparoscopic Reflux Surgery
• Laparoscopic Splenectomy
• Laparoscopic Cholecystectomy
• Sils (Single Incision Laparoscopic Surgery) Cholecystectomy
• Anorectal Area Surgery
• Laparoscopic and Open Inguinal and Incisional Hernia Surgery
• Thyroid Surgery
• Breast Surgery

Memberships to Scientific Organizations:

• European Association for Endoscopic Surgery
• National Endoscopic Laparoscopic Surgery Association
• Turkish Medical Association
• Turkish Surgical Association
• Ankara Surgical Association
• Ankara Breast Diseases Association
• Turkish Breast Diseases Association
• Ankara Medical Chamber
• Turkish Wound Care Association
• International Federation for the Surgery of Obesity and Metabolic Disorders (IFSO)

A. Articles published in international peer-reviewed journals:

A1. Koçer B., A. Soran, S. Erdoğan, M. Karabeyoğlu, O. Yıldırım, A. Eroğlu,   B. Bozkurt, Ö. Genghis. “Expression of MUC5AC in Colorectal Carcinoma and Its Relationship with Prognosis”. Pathology International, 52, 470–7 (2002).

A2.Cengiz Ö., B. Bozkurt, B. Ünal, O. Yıldırım, M. Karabeyoglu, A. Eroglu, B. Koçer, M. Ulas. “The relationship between prognostic factors of breast cancer and thyroid disorders in Turkish women”. Journal of Surgical Oncology 87, 19–25 (2004).

A3. Koçer B., M. Ulaş, Y. Üstündağ, S. Erdoğan, M. Karabeyoğlu, O. Yıldırım, B. Ünal, Ö. Cengiz, A. Soran           “A Confirmatory report for the close interaction of Helicobacter Pylori with gastric epithelial MUC5AC expression”. Journal of Clinical  Gastroenterology ,38,496-502(2004).

A4.Unal B, B. Kocer, E. Ozel, B. Altun, B. Bozkurt, O. Yıldırım, M. Dolapci, Ö. Cengiz, “Fournier Gangrene: a review of 26 cases approaches to diagnosis and treatment”. Saudi Med J. 27(7):1038–43 (2006).

A5.Yıldırım O., C. Solak, B. Koçer, B. Ünal, M. Karabeyoğlu, B. Bozkurt, S. Aksaray, Ö. Genghis. “The role of serum inflammatory markers in acute appendicitis and their success in preventing negative laparatomy”. J Investigative Surgery. 19,345–52 (2006).

A6. B. Koçer, S. Sürmeli, C. Solak, B. Ünal, B. Bozkurt, O. Yıldırım, M. Dolapcı, Ö. Genghis. “Factors affecting mortality and morbidity in patients with peptic ulcer perforation”. J. Gastroenterology and Hepatology Published article online: 7-Jun-2006, doi: 10.1111/j.1440-1746.2006.04500.x.

A7. Karabeyoğlu M. Ş., E. Canbay, L. Albayrak, O. Yıldırım, B. Ünal, B. Bozkurt, Ö. Cengiz “Concurrent ruptured ovarian follicle and appendicitis”.
Chirurgische Gastroenterologie Interdisziplinär 23,85-87 (2007).

A8. Yıldırım O., Ü. Turan, E. Menekşe, B. Ünal, B. Koçer, B. Bozkurt, M. Dolapçı, Ö. Cengiz “Ultrasonic harmonic scalpel in total thyroidectomies”. Advances in Therapy. 25 (3), 260-265 (2008).

A9. Yıldırım O.,E. Menekşe, Ü. Turan, V. Öter, M. Karabeyoğlu, B. Koçer, B. Bozkurt, Ö. Cengiz, A. Soran. “Laparoscopic cholecystectomy in elderly patients” Bratisl Lek Listy 109 (7), 313-316 (2008)

A10. Yıldırım O., O. B. Namdaroğlu, E. Menekşe, A. L. Albayrak “Giant well-differentiated liposarcoma of retroperitoneum” Bratisl Lek Listy 109 (9), 418-420 (2008)

A11. E. Canbay, B. G. Dedeoğlu, B. Bozkurt, M. Karabeyoğlu, B. Ünal, Yıldırım O.,        Ö. Cengiz, I. Yuluğ “Inhibition of focal adhesion kinase with her-2 targeted antibody pertuzumab(Omnitarg, 2C4) in breast cancer cells. Gene Therapy and Molecular Biology, 12, 293-299 (2008)

A12. B. Ünal, M. Karabeyoğlu, T. Hüner, E. Canbay, A. Eroğlu, Yıldırım O., M. Dolapçı, A. Bilgihan, Ö. Genghis. “Ethyl pyruvate protects colonic anastomosis from ischemia-reperfusion injury” Surgical innovation 16 (1), 21-25 (2009).

A13. Yıldırım O., F. Ayser, S. Arıkan, Ü. Turan, E. Menekşe, B. Ünal, M. Dolapçı, Ö. Cengiz “The comparison of pulmonary functions in open versus laparoscopic cholecystectomy” J Pak Med Assoc 59 (4) 201-204 (2009).

B. Papers presented at international scientific meetings and published in the proceedings:

B1. Yetkiner M., B. Bozkurt, O. Yıldırım, A. Bilgin, Ö. Cengiz, F. Coşkun. Liver cyst hydatitosis. International Gastroenterology Congress, 4-7 June 1997, Istanbul, Türkiye. Endoscopy 8:93, 1997.

B2. Yıldırım O., F. Coşkun, M. Koç, Ö. Cengiz, A. Bilgin, M. Karabeyoğlu. Laparoscopic cholecystectomy results of 158 cases. Euro-Asian Congress of Endoscopic Surgery, 17-21 June, 1997, Istanbul, Turkey. Surgical Endoscopy, 11: 581,1997.

B3.Yıldırım O., B. Koçer, M. Kılıç, F. Coşkun, M. Karabeyoğlu, Ö. Cengiz, M. Koç, T. Ertan, G. Kıyak. Prosthetic repair of incisional hernias. Eurosurgery’98, 17-20 June 1998, Budapest, Hungary. The British Journal of Surgery   suppl. 85:16, 1998.

B4. Eroğlu A., A. Soran, A. P. Düzgün, Ş. M. Karabeyoğlu, M. Moran, O. Yıldırım. Surgical approach in patients aged 70 years and above. Eurosurgery 2000, Abstract Number 64, 20-24 June 2000, Istanbul, Türkiye.

B5. Soran A., B. Koçer, S. Erdoğan, O. Yıldırım, Ö. Genghis. Muc 2 Gene expression in colorectal cancer. Eurosurgery 2000, Abstract Number 133: 20-24 June 2000, Istanbul, Türkiye.

B6. Bozkurt B., M. Ulaş, O. Yıldırım, T. Ertan, Ö. Genghis. “Relationship between thyroid disorders and breast cancer: Preliminary report of a prospective study”. Eurosurgery 2000, Abstract Number 226; 20-24 June 2000, Istanbul, Turkey.

B7. Soran A., İ. Renkliçay, B. Koçer, M. Ulaş, O. Yıldırım, A. Eroğlu, Ö. Genghis. “Is the quality of life superior after tension free herniorrhaphy?”. 4th Annual Meeting European Society of Surgery, PP 351, Krakow, Poland, December rd-6th 2000.

B8. Erel S., M. Karabeyoğlu, O. Yıldırım, A. Eroğlu, B. Bozkurt, A. Soran, Ö. Genghis. “Non-Surgical approach: Our experience in patients with acute pancreatitis (AP)”. 39th World Congress of Surgery Centennial Congress ISW 2001, August 26-30 2001, Brussels, Belgium.

B9. Koçer B., B.Bozkurt, B. Ünal, O.Yıldırım, M. Karabeyoğlu, A Eroğlu, Ö. Genghis. “Factors affecting recurrence and survival in our colorectal cancer patients”. Joint Meeting of M.S. C.P and T.A.C.S and 9th Turkish National Congress of Colorectal Surgery, PP37, Antalya, 9–13 September 2001.

B10. Koçer B, B. Bozkurt, B. Ünal, M. Karabeyoğlu, O. Yıldırım, A. Eroğlu, Ö. Genghis. “Do clinicopathological parameters and prognosis differ in patients with colorectal cancer over the age of 60?”. Joint Meeting of M.S.C.P and T.A.C.S and 9th Turkish National Congress of Colorectal Surgery, PP54, Antalya, 9-13 September 2001.

B11. Bozkurt B., B. Koçer, A. Eroglu, O. Yıldırım, M. Karabeyoglu, Ö. Genghis. “Hemostatix ​​Tm or cold scalpel: Is there any effect on breast surgery related axillary drainage and/ or seroma formation”. 1st Congress of The World Society for Breast Health, The Breast Journal, 7, Suppl. Sep-Oct, PP22, Istanbul, September 22–26, 2001, Istanbul.

B12. Bozkurt B., B. Ünal, O. Yıldırım, M. Karabeyoğlu, A. Eroğlu, B. Koçer, Ö. Genghis. “The relationships between thyroid disorders and breast cancer”. Eurosurgery 2002, Lisboa, 5-7 June 2002.

B13. Koçer B., G.Kıyak, S. Erdogan, B. Bozkurt, M. Karabeyoğlu, O. Yıldırım, C. Solak, Ö. Cengiz, A. Soran. “MUC1, MUC2 and MUC5AC expression in Gastric Carcinomas: Their Relationship with Prognosis”. 12th World Congress of International Association of Surgeons & Gastroenterologist, Hepatogastroenterology, 49, Suppl. II, OP153, Istanbul, October 30th- November 2nd, 2002.

B14. Erel S., B. Koçer, M. Karabeyoğlu, O. Yıldırım, A. Eroğlu, B. Bozkurt, A. Soran, Ö. Genghis. “Our Approach to pancreatic pseudocysts”. 12th World Congress of International Association of Surgeon&Gastroenterologist, Hepatogastroenterology, 49, Suppl. II, PP401, Istanbul, October 30th-November 2nd, 2002.

B15. Soran A., S. Erel, B. Koçer, O. Yıldırım, M. Karabeyoğlu, Ö. Genghis. “Is Scoring system a predictive factor for hospitalization stay length of patients with acute pancreatitis (AP)?. SMS’s 96th Annual Scientific Assembly, Southern Medical Journal, 95, Supp 2, S4-E Washington, USA, November 13-16, 2002.

B16. Erel S., B. Koçer, O. Yıldırım, B. Bozkurt, M. Karabeyoğlu, A. Eroğlu, B. Ünal, Ö. Genghis. “Nonoperative treatment of traumatic pancreatic pseudocyst: Unusual soccer injury”. Turkish Journal of Trauma & Emergency Surgery, 5th European Congress of Trauma and Emergency Surgery, OP410, Istanbul, 1 October 2002.

B17. Kocer B, C. Solak, E. Özel, B. Bozkurt, B. Ünal, O. Yıldırım, Ö. Genghis. “Predicting mortality and morbidity of patients operated for perforated peptic ulcers”. 14th World Congress of the International Association Surgical Gastroenterology, OP29.8, Zurich, September 9–12, 2004.

B18. Bozkurt B, B. Ozdemir, B. Koçer, B. Ünal, O. Yıldırım, Ö.Cengiz. “The operative approach in trauma injuries of duodenum”. 14th World Congress of the International Association Surgical Gastroenterology, OP29.5, Zurich, September 9–12, 2004.

B19.Yıldırım O., C. Solak, B. Koçer, B. Ünal, B. Bozkurt, S. Aksaray, Ö. Genghis. “The role of serum inflammatory markers in acute appendicitis and success at preventing negative laparotomy”.
14th World Congress of the International Association Surgical Gastroenterology, P34, Zurich, September 9–12, 2004.

B20. Ünal B, B. Koçer, B.Bozkurt, O. Yıldırım, E. Ozel, B. Altun, M. Dolapcı, Ö. Genghis. “Fournier Gangrene: A review of 26 cases approaches to diagnosis and treatment”. International Surgical Week, PP2877, Durban, South Africa, 21–25 August 2005.

C. Articles published in national refereed journals

C1. Mutlu S. B., E. Sipahioğlu, C. Dener, O. Yıldırım, K. Uğur Diagnostic accuracy of FNAC in the diagnosis of breast cancer Ankara Numune Hospital Medical Journal 32: 27 –30, 1992

C2. Yılmaz S., H. Özel, O. Yıldırım, V. Kırımlıoğlu, C. Dener, E. Sipahioğlu, K. Uğur Prosthetic repair in postoperative ventral hernias
Gastroentorology 5: 344 – 347, 1994.

C3. Coskun F., A. Bilgin, M. Karabeyoğlu, O. Yıldırım, A. Eroğlu Treatment of pilonidal sinus with improved flap dissection method
Türkiye Clinics Medical Sciences, 16:72 – 76, 1996.

C4. Soran A., A. F. Bulut, O. Yıldırım, Ö. Cengiz Determination of the quality of life in patients operated on for breast cancer with the SF – 36 scale. National Journal of Surgery 16: 109 – 115, 2000.

C5. Yıldırım O., A. Soran, M. Karabeyoğlu, S. Erdoğan, F. Coşkun, Ö. Cengiz  Primary thyroid lymphoma: Case report  Incision  3: 168 – 170 , 2000.

C6. Soran A., A. Eroğlu, M. Karabeyoğlu, O. Yıldırım, M. Ulaş, Ö. Cengiz  Surgical approach to the patient with toxic goiter Incision  3 : 212 – 215, 2000.

C7. Yıldırım O., A. Soran, G. Kıyak, M. Karabeyoğlu, B. Koçer, Ö. Cengiz A rare anomaly: Urachal sinus presenting as an umbilical abscess Clinical Sciences & Doctor 6: 344 – 345, 2000.

C8. Yıldırım O., A. Soran, G. Kıyak, M. Kocabeyoğlu, S. Erel, B. Şahin Hepatic segmentectomy for hepatolithiasis: Case–Report and review of the literature Turk   J   Gastroenterol     11 : 170 – 173, 2000.

C9. Karabeyoğlu M., A. Soran, N. Sarıoğlu, O. Yıldırım, A. Eroğlu, F. Coskun, Ö. Cengiz The effect of ileoprost, a prostacyclin analogue, on postoperative peritoneal adhesions and wound healing Turkey Clinics J Gastroenterohepatology 11:75 – 83, 2000.

C10. Bozkurt B., B. Sülü, B. Ünal, B. Koçer, O. Yıldırım, M. Karabeyoğlu, A. Eroğlu, Ö. Genghis. “Evaluation of the quality of life of patients with early stage breast cancer with SF-36: Does the type of surgery affect the quality of life?”,  Clinical and Sciences & Doctor (Journal of Clinical Sciences & Doctor) 10, 286–291 (2004).

C11. Koçer B., B. Ünal, S. Aydın, B. Bozkurt, O. Yıldırım, A. Eroğlu, M. Karabeyoğlu, Ö. Genghis. “Thyroid pathologies observed in elderly patients, surgical procedure selection and complication rates”. Dialysis, Transplantation and Burn, 16, 41–47 (2005)

C12. Karabeyoğlu M., B. Ünal, B. Koçer, B. Bozkurt, O. Yıldırım, A. Eroğlu, M. Dolapçı, Ö. Genghis. “Evaluation of quality of life in patients operated on due to hyperthyroidism: Does the type of surgery affect the quality of life?”. Ankara Journal of Surgery, 7, 87–92, (2005).

C13. Ünal B., A. Eroğlu, B. Bozkurt, B. Koçer, O. Yıldırım, M. Karabeyoğlu, M. Arkçı, M. Dolapçı, Ö. Genghis. “The effect of preoperative serum CA15–3 and CEA concentrations on conventional prognostic criteria in breast cancer patients”. Ankara Journal of Surgery, 7, 79–86, (2005).

C14. Ünal B., M. Karabeyoğlu, D. Ünal, B. Bozkurt, O. Yıldırım, B. Koçer, M. Dolapçı, Ö. Cengiz “Quality of life in patients undergoing inguinal hernia repair: Non-mesh suture repair vs. Lichtentein procedure” Ankara University Faculty of Medicine Journal, 60 (3), 134-136, (2007)

C15. Yıldırım O., Ü. Turan, B. Ünal, E. Menekşe “An interesting diaphragmatic injury: Case report” National Journal of Surgery. 24 (1), 42-45 (2008).

C16. Yıldırım O., O. B. Namdaroğlu, B. Ünal “Basic principles in diabetic foot treatment”. Journal of Diabetes Science. 6 (2), 58-64 (2008).

C17. Yıldırım O., Ü. Turan, b. Ünal, V. Kırımlıoğlu. “Sacrococcygeal pilonidal sinus” Journal of İnönü University Faculty of Medicine. 15 (4), 299-305 (2008)

D. Papers presented at national scientific meetings and published in proceedings:

D1. Özel H., S. Yılmaz, O. Yıldırım, İ. Kayabali. “Surgical treatment results in extrahepatic localization abdominal hydatidosis”. National Surgery Congress ’94, 9-13 June 1994, Istanbul, Türkiye.

D2. Bozkurt B., A. Bilgin, A. Eroğlu, O. Yıldırım, Ö. Genghis. “Appendix carcinoid  tumors”. XI. National Turkish Gastroenterology Congress, 6-9 November 1994, Antalya, Türkiye.

D3. Eroğlu A., T. Oruç, T. Bulut, O. Yıldırım, Ö. Genghis. “The effect of tamoxifen on serum lipid profile in the treatment of breast cancer”. XI. National Cancer Congress, 1995, Antalya, Türkiye. Turkish Journal of Oncology 10:57,1995.

D4. Bozkurt B, A. Eroğlu, O. Yıldırım, A. Bilgin, M. Koç, Ö. Genghis. “Our cases of carcinoid tumor in the appendix and our treatment approach”. XI. National Cancer Congress, 1995, Antalya, Türkiye. Turkish Journal of Oncology 10:88,1995.

D5. Yıldırım O., M. Karabeyoğlu, M. Yetkiner, O. Kocamış, F. Coşkun. “The place of paracentesis, peritoneal lavage and USG in the approach to the traumatized patient”. 1st Trauma and Emergency Surgery Congress, 19-23 September 1995, Istanbul, Türkiye.

D6. Sarıoğlu H., O. Yıldırım, M. Kılıç, T. Bulut. “Traumatic accessory spleen rupture”. 1st Trauma and Emergency Surgery Congress, 19-23 September 1995, Istanbul, Türkiye.

D7. Karabeyoğlu M., O. Yıldırım, O. Kocamış, M. Yetkiner, Ö. Cengiz. “Approach to incarcerated inguinal and femoral hernias”. 1st Trauma and Emergency Surgery Congress, 19-23 September 1995, Istanbul, Türkiye.

D8. Kavurmacı M., F. Coşkun, A. Bilgin, S. Aksaray, Ö. Cengiz, O. Yıldırım. “The effect of operative decompression on bacteremia in experimentally induced colon obstructions in Winstar-Albino rats”. National Surgery Congress, 15-19 May, 1996, Antalya, Türkiye.

D9. Karabeyoğlu M., H. Sarıoğlu, O. Yıldırım, A. Bilgin, Ö. Genghis. “Nipple discharge”. National Surgery Congress, 15-19 May, 1996, Antalya, Türkiye.

D10. Yıldırım O., M. Yetkiner, M. Kılıç, M. Karabeyoğlu, F. Coşkun, M. Koç. “A rare anomaly: Urachal sinus presenting as an umbilical abscess.” National Surgery Congress, 15-19 May, 1996, Antalya, Türkiye.

D11. Yıldırım O., O. Kocamış, M. Yetkiner, B. Koçer, F. Coşkun, Ö. Genghis. “Early surgical intervention in acute cholecystitis”. National Surgery Congress, SB112, 15-19 May, 1996, Antalya, Türkiye.

D12. Yıldırım O., F. Coşkun, M. Karabeyoğlu, M. Kılıç, M. Koç, M. Kılıçlar. “Primary thyroid lymphoma”. National Surgery Congress ’98, 6-10 May 1998, Izmir, Türkiye.

D13. Coşkun F., Ö. Cengiz, A. Bilgin, O. Yıldırım, O. Kocamış, G. Kıyak. “The effect of decompression on bacterial translocation and bacteremia in intestinal obstructions”. National Surgery Congress’98, 6-10 May 1998, Izmir, Türkiye.

D14. Soran A., S. Erel, O. Yıldırım, M. Karabeyoğlu, Ö. Cengiz   “Is our approach to acute pancreatitis changing?”. Hepato Pancreato Biliary Surgery Congress, 8-9 June 1999, Antalya, Türkiye.

D15. Soran A., B. Koçer, M. Karabeyoğlu, O. Yıldırım, F. Coşkun, Ö. Genghis. “Correlation of preoperative CEA value with disease stage, lymph node involvement and tumor diameter in patients with colorectal cancer”. VIIIth National Colon and Rectum Surgery Congress, 13-16 September 1999, Antalya, Türkiye.

D16. Soran A.,B. Koçer, O. Yıldırım, M. Karabeyoğlu, Ö. Genghis. “The importance of MUC2 and MUC5 gene expression in colorectal cancer”. Ankara Surgical Association 5th Scientific Meeting, 26 February 2000, Ankara, Türkiye.

D17. Soran A.,B. Koçer, M. Karabeyoğlu, O. Yıldırım, Ö. Genghis. “Mucin gene expression and significance in colorectal cancer”. Turkish Gastroenterology Association Ankara Branch 3rd Scientific Meeting, 2000, Ankara, Türkiye.

D18. Soran A., A.F. Bulut, O. Yıldırım, M. Karabeyoğlu, Ö. Genghis. “Determining the quality of life in patients operated for breast cancer using the SF_36 scale”. V. Aegean Oncology Days, Breast Cancers Symposium, 7-8 April 2000, Izmir, Türkiye.

D19. Bozkurt B., B. Koçer, A. Eroğlu, O. Yıldırım, M. Karabeyoğlu, Ö. Genghis. “Does the type of drain used affect the amount of axillary drainage after breast cancer surgery?”. VI. National Breast Diseases Congress, Journal of Breast Diseases (special issue) 8, P–58, Istanbul, 22–26 September 2001.

D20. Ulaş M., Y. Üstündağ, B. Koçer, S. Erdoğan, M. Karabeyoğlu, B. Bozkurt, O. Yıldırım, A. Soran, Ö. Genghis.
“The importance of mucin gene expression in Helicobacter Pylori infection; Examination of MUC1, MUC2 and MUC5AC expressions”.
National Gastroenterology Congress, The Turkish Journal of Gastroenterology 12, Suppl. 1, SB5, Kuşadası, November 2001.

D21. Yıldırım O., İ. Yılmaz, B. Koçer, B. Bozkurt, S. Erel, B. Ünal. “Comparison of the results of closed techniques used in the surgical treatment of pilonidal sinus”. National Surgery Congress, SB180, Antalya, 15–19 June 2002.

D22. Bozkurt B.,S. Aydın, B. Koçer, O. Yıldırım, M. Karabeyoğlu, Ö. Genghis. “Factors affecting local recurrence and distant metastasis in our breast cancer patients”. National Surgery Congress, SB003, Antalya, 15–19 June 2002.

D23. Yıldırım O., D. Şimşek, E. Mert, S. Erel, B. Koçer, B. Bozkurt, B. Ünal, M.Karabeyoğlu. “An interesting case of diaphragmatic rupture”. 4th National Trauma and Emergency Surgery Congress, Istanbul, 1 October 2002.

D24. Karabeyoğlu M., B. Koçer, İ. Karaçay, O. Yıldırım, B. Bozkurt, A. Soran, Ö. Genghis. “Do different operation techniques in Inguinal Hernia repair make a difference in the quality of life?”. National Surgery Congress, Antalya, 15-19 May 2002.

D25. Bozkurt B., B. Sülü, B. Ünal, B. Koçer, O. Yıldırım, M. Karabeyoğlu, A. Eroğlu “Evaluation of the Quality of Life of Patients with Early Stage Cancer with SF-36: Does the Type of Surgery Affect the Quality of Life?”. VII. National Breast Diseases Congress, SB17Antalya, 16-19 October 2003.

D26. Karabeyoğlu M., O. Yıldırım, B. Koçer, B. Bozkurt, B. Ünal, A. Eroğlu, S. Aydın, Ö. Genghis. “Effects of different methods in the surgical treatment of hyperthyroidism on quality of life”. National Surgery Congress, SB274, Antalya, 26–30 May 2004.

D27. Yılmazer M., O. Yıldırım, A. Balkanlı, B. Bozkurt, B. Koçer, B. Ünal, M. Karabeyoglu, Ö. Cengiz, N. Aslan, M. Tümöz. “Evaluation of psychiatric symptoms in patients diagnosed with breast CA”. National Surgery Congress, SB-108, Antalya, 26–30 May 2004.

D28. Bozkurt B., B. Altun, B. Koçer, B. Ünal, O. Yıldırım, Ö. Genghis. “Morbidity and mortality in penetrating duodenal injuries”. National Surgery Congress, P-50, Antalya, 26–30 May 2004.

D29. Koçer B., B. Ünal, S. Aydın, A. Eroğlu, O. Yıldırım, Ö. Cengiz “Thyroid pathologies observed in elderly patients, surgical procedure selection and postoperative complication rates”. National Surgery Congress, P-307, Antalya, 26-30 May 2004.

D30. Ünal B., B. Koçer, S. Aydın, O. Yıldırım, A. Eroğlu, Ö. Genghis. “Surgery in thyroid diseases: analysis of 721 cases and factors affecting complications”. National Surgery Congress, P-308, Antalya, 26-30 May 2004

D31. Yıldırım O., B. Kocer, Ü. Turan, B. Ünal, B. Bozkurt, Ö. Cengiz, A. Eroglu, M. Dolapcı. “Comparison of ultrasonic dissector technique and conventional technique in total thyroidectomies”. National Surgery Congress, SB- 209, Antalya, 24–28 May 2006. ,

D32. Ünal B, M. Karabeyoglu, B. Kocer, B. Bozkurt, O. Yıldırım, A. Eroğlu, U. Aydın, B. Özlu, Ö. Genghis. “Factors affecting early complications in patients operated on due to hyperthyroidism”. National Surgery Congress, P–485, Antalya, 26–28 May 2006.

D33. Ünal B., B. Bozkurt, B. Kocer, M. Karabeyoğlu, O. Yıldırım, E. Özel, B. Özlu, M. Dolapçı, Ö.Cengiz. “Risk factors for hypocalcemia; “Analysis of 887 thyroidectomy cases”. National Surgery Congress, P- 451, Antalya, 24–28 May 2006.

D34. Yıldırım O, B. Koçer, B. Ünal, B. Bozkurt, M. Karabeyoğlu, Ö. Cengiz, M. Dolapçı, Ü. Turan. “Comparison of respiratory functions in Open and Laparoscopic Cholecystectomies”. National Surgery Congress, P–336, Antalya, 26–28 May 2006.

D35. Bozkurt B., B. Gür, E. Canbay, M. Karabeyoğlu, B. Ünal, O. Yıldırım, Ö. Cengiz,  I. G. Yuluğ “Focal adhesion kinase inhibition by HER–2 antibody pertuzumab (2C4) in Breast Cancer Cells”. National Surgery Congress, S-194, Antalya, 4–28 May.2006.