Uluslararası Hakemli Dergilerde Yayımlanan Makaleler

1-Causes of diagnostic and treatment delays in locally advanced breast cancer: a nationwide multicenter survey and electronic health records analysis in Turkiye Karadeniz Cakmak G, Tali U, Balbaloglu H, Tasdoven I, Ozkurt E, Karanlik H, Zihni İ, Dogan L, Akcay M, Gunay S, Basım P, Kucuk GO, Pergel A, Maralcan G, Ugurlu MU, Gurleyik G, Akan A, Uzunkoy A, Yıldırım E, Koksal H, Haberal E, Gulcelik MA, Morkavuk B, Kivilcim T, Ucar BI, Kocer HB, Gumusay O, Uras C, Varlı M, Ersoy Y, Ozcinar B, Kafadar T, Badak B, Dag A, Sezer A, Ozkan Gurdal S, Agcaoglu O, Canturk NZ, Yıldız OE, Dalcı K, Altinok A, Aktas A, Kebudi A, Dilege E, Batu HF, Vural V, Sakman G, Bolukbasi Y, Emiroglu S, Cabioglu N, Deniz O, Filiz Aİ, Yildirim AC, Bayir D, Olmez O, Bakkal BH, Bahadir B, Alicioglu B, Buyukuysal MC, Ozaydın Y, Kaya H, Bakir N, Comert M, Ozmen V.. Eur J Public Health. 2025 Jul 8: ckaf108. doi: 10.1093/eurpub/ckaf108. Epub ahead of print.

2-Combined analysis of the MF18-02/MF18-03 NEOSENTITURK studies: ypN-positive disease does not necessitate axillary lymph node dissection in patients with breast cancer with a good response to neoadjuvant chemotherapy as long as radiotherapy is provided. Müslümanoğlu M, Cabioğlu N, İğci A, Karanlık H, Kocer HB, Senol K, Mantoglu B, Tukenmez M. et al. Cancer 2025

3-De-Escalation of Nodal Surgery in Clinically Node-Positive Breast Cancer. Cabioglu N, Kocer HB, Karanlik H, Gülçelik MA, Igci A, Müslümanoglu M, Uras C, Mantoglu B, Trabulus DC, Akgül G, Tükenmez M, Senol K et al. JAMA Surg. 2025 Mar 1;160(3):257-266. doi: 10.1001/jamasurg.2024

4-ASO Visual Abstract: Breast Cancer Recurrence in Initially Clinically Node-Positive Patients Undergoing Sentinel Lymph Node Biopsy after Neoadjuvant Chemotherapy in the NEOSENTITURK-trials MF18-02/18-03. Cabioglu, N , Karanlik, H, Igci, A, Muslumanoglu, M, Gulcelik, MA , Uras, C, Kocer, HB , Trabulus, DC, Ozkurt, E , Cakmak, GK et al. Annals of Surgical Oncology. 2025; 32(5): 3345-3347. DOI: 10.1245/s10434-024-16746-z.

5-Breast Cancer Recurrence in Initially Clinically Node-Positive Patients Undergoing Sentinel Lymph Node Biopsy After Neoadjuvant Chemotherapy in the NEOSENTITURK-Trials MF18-02/18-03. Cabioglu, N , Karanlik, H, Igci, A, Muslumanoglu, M, Gulcelik, MA , Uras, C, Kocer, HB , Trabulus, DC, Ozkurt, E , Cakmak, GK et al. Ann Surg Oncol 32, 952–966 (2025).

6- Investigation of the alterations in miRNA expression levels in thyroid nodules and malignancies. Merve Yigit , Zulfu Bayhan , Gamze Guney Eskiler, Asuman Deveci Özkan, Kayhan Özdemir, Ahmet Tarık Harmantepe, Havva Belma Koçer. Updates Surg. 2024 Oct; 76 (6): 2329-2335.

7- A prognostic model for use before elective surgery to estimate the risk of postoperative pulmonary complications (GSU-Pulmonary Score): a development and validation study in three international cohorts. Lancet Digit Health 2024 Jul;6(7):e507-e519. doi: 10.1016/S2589-7500(24)00065-7. NIHR Global Health Research Unit on Global Surgery; STARSurg Collaborative, Kocer Belma.

8- The Underestimated Impact of Hashimoto Thyroiditis on Thyroid Papillary Carcinoma. Tarık Harmantepe, Ozdemir K, Bayhan Z, Kocer B. Updates Surg 2024 Apr 30. doi: 10.1007/s13304-024-01854-y.

9-A novel index to predict postoperative hypocalcemia in primary hyperparathyroidism AT Harmantepe, E Bas, Y Akdeniz, A Kucuk, Z Bayhan, Kocer HB. Irish Journal of Medical Science 2024 Jun; 193 (3): 1261-1266.

10- The unexpected effect of parathyroid adenoma on inflammation. Harmantepe, A. T., Kocer, B., Bayhan, Z., Gonullu, E., & Dulger, U. C. (2023). Updates in Surgery, 1-5. Doi:10.1007/s13304-023-01734-x.

11- Reply to the editor: should multifocality be an indication for prophylactic neck dissection for papillary thyroid cancer? Kayhan Ozdemir, Belma Kocer, Zulfu Bayhan. Updates in Surgery. 2023/9/8. doi.org/10.1007/s13304-023-01645.

12- CNN-based deep learning method for predicting the disease response to the Neoadjuvant Chemotherapy (NAC) treatment in breast cancer. Kirelli, Y., Arslankaya, S., Koçer, H. B., & Harmantepe, T. (2023). HELIYON (2023), doi: https:// doi.org/10.1016/j.heliyon. 2023. e16812.

13- The prognostic and predictive values of differential expression of exosomal receptor tyrosine kinases and associated with the PI3K/AKT/mTOR signaling in breast cancer patients undergoing neoadjuvant chemotherapy. Gamze Guney Eskiler 1, Nur Kazan 2, Ayten Haciefendi 2, Asuman Deveci Ozkan 3, Kayhan Ozdemir 4, Mirac Ozen 5, Havva Belma Kocer 6,. Fahri Yilmaz 7, Suleyman Kaleli 3, Elvan Sahin 8, Cemil Bilir 9 Clin Transl OncoL 2023, 25(2); 460-472 doi: 10.1007/s12094-022-02959-9

14- Should multifocality be an indication for prophylactic central neck dissection in papillary thyroid cancer.Kayhan Ozdemir, Ahmet Tarik Harmantepe, Emre Gonullu, Belma Kocer, Zulfu Bayhan. Updates in Surgery volume 75, pages701–706 (2023).

15- Effect of the MiR-99b and MiR-135b on peritoneal carcinomatosis and liver metastasis in colorectal cancer. Mehmet Aziret, Gamze Eskiler, Gözde Çakırsoy Çakar, Metin Ercan, Cemil Bilir, Erdal Polat, Havva Belma Koçer, Ebru Kayra Yıldırım, Mustafa Duman, Asuman Deveci Özkan Clinics (Sao Paulo, Brazil), 78, Article number 100271, Doi: 10.1016/j.clinsp.2023.100271.

16- Does The Presence Of Chronıc Lymphocytıc Thyroıdıtıs Affect Dıagnostıc Value Of Fıne Needle Aspıratıon Bıopsy In Bethesda Category Iıı Nodules? Şevki Pedük, Belma Koçer. Acta Clin Croat 2023 Nov;62(3):464-472. doi: 10.20471/acc.2023.62.03.8

17- "Factors affecting complete response to neoadjuvant chemotherapy in triple negative breast cancer patients." Ahmet, KAYA, Havva Belma KOÇER, and Yeşim AKDENİZ. Ankara Eğitim ve Araştırma Hastanesi Tıp Dergisi 56.1 (2023): 11-14.

18- Evaluation of the Clinicopathological Features of Patients with Phyllodes Tumor of the Breast: A Retrospective Study From a Single Center. Bayhan, Z., Koçer, H. B., Gönüllü, E., Baş, E., Harmantepe, A. T., Çapoğlu, R., & Coşkun, M. (2022). Kocaeli Medical Journal, 11(3), 10-16.

19- The Predictive Role of MMP-2, MMP-9, TIMP-1 and TIMP-2 Serum Levels in the Complete Response of the Tumor to Chemotherapy in Breast Cancer Patients. Kayhan Ozdemir, Ismail Zengin, Gamze Guney Eskiler, Havva Belma Kocer, Asuman Deveci Ozkan, Tayfur Demiray & Elif Ozozen Sahin. Journal of Investigative Surgery, 2022, VOL. 35, NO. 7, 1544–1550 DOI:10.1080/08941939.2022.2080308.

20-ACOSOG Z0011 Çağında Erken Meme Kanseri Hastalarının Aksiller Tedavisi. Tecrübemiz ED Barış Mantoğlu, Belma Koçer, Emre Gönüllü, Yeşim Akdeniz, Kayhan Özdemir. Kocaeli Medical Journal 77 (1), 110-117

21-Meme Kanserinde Oksidatif Stresin Prognostik Değeri ve Önemi. Prognostic Value and Significance of Oxidative Stress in Breast Cancer. İsmail Zengin, Belma Kocer, Tayfur Demiray, Kerem Yılmaz. Online Turkish Journal of Health Sciences 2022; 7(3): 453-459.Doi: 10.26453/otjhs.1080001.

22-Coexistence of Neurofibromatosis Type 1 and Male in Breast Cancer. Baris Mantoglu, Burak Kamburoglu, Ismail Zengin, Kayhan Ozdemir, Ebru Kayra, Emre Gonullu, Fatih Altintoprak, Belma Kocer. Arch Iran Med. November 2021; 24(11): 852-855. Doi: 10.34172/aim.2021.126

23-The Relationship between Mammographic Density and Factors Affecting Breast Cancer Risk. Belma Kocer, Ebru Menekse, Umit Turan, Ozan Namdaroglu, Ayse Nurdan Barca, Levent Araz, Buket Altun Özdemir, Betul Bozkurt. The Medical Bulletin of Sisli Etfal Hospital. doi: 10.14744/SEMB.2021.30771.

24- Effect of COVID-19 pandemic lockdowns on planned cancer surgery for 15 tumour types in 61 countries: an international, prospective, cohort study. Irish Surgical Research Collaborative, Transatlantic Australasian Retroperitoneal Sarcoma Working Group. The Lancet Oncology 22 (11), 1507-1517.

25- SARS-CoV-2 infection and venous thromboembolism after surgery: an international prospective cohort study. COVIDSurg Collaborative; GlobalSurg Collaborative. Belma Kocer. Anaesthesia. 2022 Jan;77(1):28-39. doi: 10.1111/anae.15563. Epub 2021 Aug 24.

26- Effects of pre-operative isolation on postoperative pulmonary complications after surgery: an international prospective study. COVIDSurg Collaborative; GlobalSurg Collaborative. Belma Kocer. Anaesthesia. 2021 Nov;76(11):1454-1464. doi: 10.1111/anae.15560. Epub 2021 Aug 9.PMID: 34371522 Clinical Trial.

27- Coexistence of Neurofibromatosis Type 1 and Male Breast Cancer. Baris Mantoglu, Burak Kamburoglu, Ismail Zengin, Kayhan Ozdemir, Ebru Kayra, Emre Gonullu, Fatih Altintoprak, Belma Kocer. Arch Iran Med. November 2021;24(11):852-855.

28- Machine learning risk prediction of mortality for patients undergoing surgery with perioperative SARS-CoV-2: the COVIDSurg mortality score. Belma Koçer. COVIDSurg Collaborative Co-authors. BJS, 2021, 1–19 DOI: 10.1093/bjs/znab183. Rapid Research Communication.

29- Cengiz H., Varim C., Demirci T., Cetin S., Karacaer C., Koçer H. The Familial Hypocalciuric Hypercalcemia Presented With Advanced Hypercalcemia And Extremely Hİgh Parathormon Levels (Case Report). Georgian Medical News. 2021; 10 (319): 108-111.

30-Effect of Covid-19 On Emergency Surgical Cases. Data From A High-Volume City. B.Mantoğlu, E. Gönüllü, E. Dikicier, AT. Harmantepe, A. Muhtaroğlu, S. Çınar, O. Yağmurkaya, M. Şenol, Z. Kurt, M. Akçay, UC Dülger, Z. Bayhan, F. Altintoprak, B. Kocer, F. Çelebi, Journal of Biotechnology and Strategic Health Research (J Biotechnol and Strategic Health Res.) 2021;5(1):65-70.

31- Timing of surgery following SARS-CoV-2 infection: an international prospective cohort study.COVIDSurg Collaborative; GlobalSurg Collaborative Anaesthesia. 2021 Mar 9. doi: 10.1111/anae.15458. Online ahead of print.

32- SARS-CoV-2 vaccination modelling for safe surgery to save lives: data from international prospective cohort study. COVIDSurg Collaborative, GlobalSurg Collaborative. Kocer B. BJS, 2021, 1-8. DOI: 10.1093/bjs/znab101

33- Elective Cancer Surgery in COVID-19-Free Surgical Pathways During the SARS-CoV-2 Pandemic: An International, Multicenter, Comparative Cohort Study. COVIDSurg Collaborative. Kocer B. J Clin Oncol. 2021 Jan 1;39(1):66-78. doi: 10.1200/JCO.20.01933. Epub 2020 Oct 6.

34- Preoperative nasopharyngeal swab testing and postoperative pulmonary complications in patients undergoing elective surgery during the SARS-CoV-2 pandemic. COVIDSurg Collaborative. Kocer B. British Journal of Surgery, 2020, 00, 1–9 DOI: 10.1093/bjs/znaa051

35- Head and neck cancer surgery during the COVID‐19 pandemic: An international, multicenter, observational cohort study. COVIDSurg Collaborative. Kocer B. Cancer. 2020 Dec 21. doi: 10.1002/cncr.33320. Online ahead of print.

36- Delaying surgery for patients with a previous SARS-COV-2 infection. COVIDSurg Collaborative. Kocer B. Br J Surg 2020 Sep 25. Doi:10.1002/bjs.12050.

37-Omission of sentinel lymph node biopsy in women age 70 years or older breast cancer patients. Belma Koçer. Breast Health, 2019.

38- Akdeniz Y, Kucuk A I, Yilmaz F, Capoglu R, Kocer B. Thyroid Lymphoma Presenting with Compressive Symptoms and Early Transformation into Diffuse Large B-Cell Lymphoma. J Endocrinol Thyroid Res. 2020; 5(2): 555660. DOI: 10.19080/JETR.2020.05.555660

39- Dermatofibrosarcoma Protuberans with a Spindle and Pleomorphic Cell High-Grade Sarcoma in the Breast: A Rare Case Report. Ali İmran Küçük, Belma Koçer, Gupse Turan, Gulsah Kaygusuz, Serpil Dizbay Sak, Fuldem Mutlu. J Tumor Res. 2018; 4:1.

40- A Benign Rare Lesion of The Breast: Giant Epidermal Inclusion Cyst. Ali İmran Küçük, Belma Koçer, Gupse Turan, Yasemin Gündüz, Kayhan Özdemir. Cureus 2018; 10(5): e2650. DOİ: 10.7759/ cureus.2650.

41- Kocer B. Peer review report on “To assess the effects of parathyroidectomy (TPTX versus TPTX + AT) for secondary hyperparathyroidism in chromic renal failure: A meta-analysis. International Journal of Surgery 37 Supplement 1 (2017), P69, S140-141.

42- Demir H, Karaman K, Ercan M, Kocer B, Celebi F. Comparison of two procedures for symptomatic hemoohoidal disease: ligation under vision and ferguson hemorrhoidectomy-A retrospective cohort study. Pak J Med Sci. 2017; 33 (1): 90-95.

43- Metin Ercan, Aziret M, Bal A , Sentürk A,Karaman K, Kahyaoglu Z Kocer HB , Bostancı B, Akoglu M. Pancreatic schwannoma: A rare case and a brief literature review. International Journal of Surgery Case Reports 22 (2016) 101–104

44- O. B. Namdaroglu · Y. Sevim · O. Yildirim · E. Ozhamam · B. Kocer. Littoral cell angioma of the spleen: case report and literature review. Eur Surg DOI 10.1007/s10353-015-0332-x.Published online July 1, 2015.A22. Menekse E, B. Kocer, R. Topcu, A. Ölmez, M. Tez, C. Kayaalp. A Practical Scoring System to Predict Mortality in Patients with Perforated Peptic Ulcer. The World Journal of Emergency Surgery 2015 (World J Emerg Surg. 2015 Feb 21;10:7. doi: 10.1186/s13017-015-0008-7. eCollection 2015)

45- Kocer B, U. Turan, S. Surmeli, B. Altun, S. Aksaray, OC. Yilmaz, O. Cengiz. Serum neopterin as a prognostic indicator in patients with breast carcinoma. Central European Journal of Medicine DOI: 10,2478/s11536–010–0017–6, 24 February 2010.

46- Unal B, B. Koçer, B. Altun, S. Sürmeli, S. Aksaray, M. Balcı, B. Özlü, O. Cengiz. Serum Neopterin as a prognostic indicator in gastric carcinoma. Journal of Investigative Surgery 22, 419-425; 2009.

47- Karabeyoglu M, B. Unal, A. Dirican, B.Koçer, AS Gür, B. Bozkurt, O. Cengiz. A. Soran. The relation between preoperative ultrasonografic thyroid volume analysis and thyroidectomy complications. Endocrine Regulations 43, 83–7 2009.

48- Yıldırım O, E Menekşe, Ü Turan, V Öter, M Karabeyoğlu, B Koçer, B Bozkurt, O Cengiz, A Soran. Laparoscopic cholecystectomy in elderly patients. Bratisl Lek Listy 109 (7); 313–318, (2008).

49- Yıldırım O., U. Turan, E. Menekse, B. Ünal, B. Koçer, B. Bozkurt, M. Dolapci, O. Cengiz. Ultrasonic Harmonic Scalpel in Total Thyroidectomies. Advances in Therapy Mar 7, (2008).

50- Ünal B., M. Karabeyoğlu, B. Bozkurt, B. Koçer, E. Özel, Ö. Cengiz. Primary rectal lymphoma: An unusual treatment for a rare case. Postgrad Med J 2008;84.333–335. doi:10.1136/pgmj.2007.064006.

51- Beriwal S., A. Soran, B. Kocer, J.W. Wilson, G. Ahrendt, R. Johnson. Factors which Predict the Burden of Axillary Disease in Sentinel Node Positive Patients. American Journal of Clinical Oncology 31 (1) 34–38 (2008).

52- Karabeyoğlu M, B Koçer, Ü Özel, FO Atasay, H Üstün, M Dolapcı, I Karabeyoğlu, Ö Cengiz. “The protective effect of ethyl pyruvate on lung injury after burn in rats”. Saudi Med J, 28 (10):1489–92. (2007).

53-Soran A. T. Evrensel. G. Ahrent, B. Koçer, R. Johnson. “Use of the Breast Cancer Nomogram to Predict Non-Sentinel Positivity in Patients Having Received Pre-Operative Chemotherapy. Ann Surg Oncol. 14, 165 (2007).

54- Unal B, B. Koçer, E. Ozel, B. Altun, B. Bozkurt, O. Yildirim, M. Dolapci, O. Cengiz. “Fournier Gangrene: a review of 26 cases approaches to diagnosis and treatment”. Saudi Med J., 27, 1038-43 (2006).

55- Yıldırım O., C. Solak, B. Koçer, B. Ünal, M. Karabeyoğlu, B. Bozkurt, S. Aksaray, Ö. Cengiz. “The role of serum inflammatory markers in acute appendicitis and their success in preventing negative laparatomy”. J Invest Surg., 19, 345-52 (2006).

56-Koçer B., S. Sürmeli, C. Solak, B. Ünal, B. Bozkurt, O. Yıldırım, M. Dolapcı, Ö. Cengiz. “Factors effecting mortality and morbidity in patients with peptic ulcer perforation”. J. Gastroenterology and Hepatology.Online basim tarihi: 7-Jun-2006, doi: 10.1111/j.1440-1746.2006.04500.x.

57- Bozkurt B., B. Altun Ozdemir, B.Koçer, B. Unal, M. Dolapcı, Ö.Cengiz. “Operative approach in traumatic injuries of duodenum”. Acta Chirurgica Belgica, 106, 405-8 (2006).

58-Cengiz Ö., B. Koçer, S. Sürmeli, MJ. Santicky, A. Soran. “Are pretreatment serum albumin and cholesterol levels prognostic tools in patients with colorectal carcinoma?”. Med Sci Monit., 12, 240-247 (2006).

59-Koçer B, J. McKolanis, A. Soran. “Humoral immune response to MUC5AC in patients with colorectal polyps and colorectal carcinoma”. BMC Gastroenterol., 6,4 (2006).

60-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).

61-Koçer B. A Soran, G Kıyak, S Erdoğan, A Eroğlu, B Bozkurt, C Solak, Ö. Cengiz. “Prognostic significance of mucin expression in gastric carcinoma”. Digestive Diseases and Sciences, 49, 954–964 (2004).

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

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

64-Koçer B. A.Soran, S.Erdoğan, T.Ertan, B.Ünal, S.Erel, Ö.Cengiz. “Clinical value of MUC2 expression in colorectal carcinoma”. Nagoya Medical Journal, 45, 75–87 (2001).

65-Ertan T., A.Soran, B.Koçer, Ö.Cengiz. “Oxidative stress in hemorrhagic shock: Prospective clinical study”. Nagoya Medical Journal, 45, 43–54 (2001).

Ulusal Hakemli Dergilerde Yayımlanan Makaleler:

1. Özdemir, K., Özman, Z., Güney Eskiler, G., Kamburoğlu, B., & Koçer, H. B. (2022). Triple Negatif Meme Kanserinde IL-6 ve STAT3-ün Prediktif Rolünün Araştırılması. openaccess.bezmialem.edu.tr

2. Mantoğlu B, Gönüllü E , Dikicier E , Harmantepe A , Muhtaroğlu A , Çınar S , Yağmurkaya O , Şenol M , Akçay M , Dülger U , Bayhan Z , Kurt Z , Altıntoprak F , Koçer H , Çelebi F . The effect of Covid-19 on Emergency Surgical Cases. Data From a High-Volume City. J Biotechinol & Strategic Health Res. 2021; 5(1): 65-70. e-ISSN:2587-1641

3. Herediter ve Ailesel Meme Kanserlerinin Aile Öyküsü ile Klinikopatolojik Özelliklerinin Karşılaştırılması. Kayhan Özdemir, Merve Yiğit, Yasemin Anıl Eyüboğlu Tanrıverdi, Mine Urfalı, Belma Koçer. Sakarya Tıp Dergisi/Sakarya Med J 2021, 11(3):647-653) DOI: 10.31832/smj.934186

4. Surgical Outcomes In Elderly Patients With Obstructed Colorectal Cancer: Sıngle Center Experience.Enis DİKİCİER, Muhammed Burak KAMBUROGLU, Emre GOULLU,Yeşim AKDENİZ, Kayhan OZDEMİR, Barış MANTOGLU, Havva Belma KOCER, Fehmi CELEBİ. Ankara Eğt. Arş. Hast. Derg., 2020 ; 53(3) : 196-201. DOI: 10.20492/aeahtd.805025

5. Mide Kanserli Hastalarda Preoperatı̇f Serum CRP Ve IL-6’nın Prognostı̇k Değerı̇. Buket Altun Özdemı̇r, H. Belma Koçer, Mustafa Balcı. Ankara Eğt. Arş. Hast. Derg., 2020 ; 53(3) : 188-195. DOI: 10.20492/aeahtd.790344

6. Turkish National Consensus on Breast Cancer Management During Temporary State of Emergency Due to COVID-19 Outbreak. Atakan Sezer1,2, Irfan Cicin3, Guldeniz Karadeniz Cakmak1,4, Sibel Ozkan Gurdal1,5, Gul Basaran 1,6, Basak Oyan6, Yesim Eralp6 and Bahadir M. Gulluoglu1,7 with Turkish National Breast Oncology Specialists Task Force for COVID-198 Belma Koçer. Turk J Surg 2020; 36 (2): 147-163.

7. İnvaziv Duktal Meme Kanserli Genç Olgularda MR Bulgularının, BRCA Mutasyon ve İmmünohistokimyasal Sonuçları ile Korelasyonu. Kıyasettin Asil, Furkan Ertürk Urfalı, Mine Urfalı, Yasemin Anıl Eyüboğlu Tanrıverdi, Havva Belma Koçer. Sakarya Tıp Dergisi 2019;9(3):406-411.

8. The Role of Radiography Guided Non-Palpable Breast Lesion Marking on the Diagnosis of Early Breast Cancer and Proliferative Diseases. Bahattin Özlü, Memduh Şahin, Kıvılcım Esra Erdoğan, Belma Koçer. Van Tıp Derg 25(1); 34-42, 2018. Doi: 10.5505/vtd.2018.08108.

9. Vitamin D Düzeylerinin Tiroidektomi Sonrası Gelişen Hipokalsemi Üzerine Etkisi. Ali İmran Küçük, Yeşim Akdeniz, Havva Belma Koçer, Yusuf Arslan. Kocaeli Med J 2018; 7: 2: 50-54.

10. Ductal carcinoma in situ arising within a benign phyllodes tumor: A case report. Ali İmran Küçük, Havva Belma Koçer, Şahin Erdem, Ali Bal, Güner Çakmak, Adem Şentürk. Acta Oncologic Turcica. Doi: 10.550/aot2018.08769.

11. Solunum sıkıntısı ile başvuran ve tedavi esnasında alt tip transformasyonu gösteren primer tiroid lenfoması . Yeşim Akdeniz1, Recayi Çapoğlu1, Ali İmran Küçük2, Fahri Yılmaz3, Tuba Hacıbekiroğlu4, Yasemin Gündüz5, Belma Koçer. Turk J Surg 2017; 33 (Suppl.-2): PS-69, S225.

12. Ünal B., B. Bozkurt, M. Karabeyoğlu, B. Koçer, B. Özlü, D. Ünal, Ö.Cengiz. Tiroid cerrahisinde komplikasyonları etkileyen faktörler: 1022 olgunun analizi. Endokrinolojide Dialog Dergisi 2, 38-43, (2008).

13. Ünal B., M. Karabeyoğlu, B. Bozkurt, B. Koçer, M. Dolapcı, Ö. Cengiz. Quality of life in patients undergoing, inguinal hernia repair: Non- mesh suture repair vs. Lichtenstein procedure. Ankara Ü. Tıp Fak. Mecmuası, 60, 134–136, (2007).

14. Soran A., B.Koçer, N. Yazıhan, H. Ataoğlu, B.Ünal, Ö. Cengiz. Meme kanseri lenf nodu metastazında serum vasküler endotelyal büyüme faktörleri C, D ve C/D oranının önemi: Prospektif Klinik Çalışma. Meme Sağlığı Dergisi, 3, 125–130, (2007).

15. Ünal B., A.Eroğlu, B.Bozkurt, B.Koçer, O.Yıldırım, M.Karabeyoğlu, M.Arkçı, M.Dolapçı, Ö.Cengiz. “Meme kanseri hastalarında preoperatif serum CA15–3 ve CEA konsantrasyonlarının konvansiyonel prognostik kriterler üzerine etkisi”. Ankara Cerrahi Dergisi, 7, 79–86, (2005).

16. Karabeyoğlu M., B.Ünal, B.Koçer, B.Bozkurt, O. Yıldırım, A.Eroğlu, M.Dolapçı, Ö.Cengiz. “Hipertiroidi nedeni ile ameliyat edilen hastalarda yaşam kalitesinin değerlendirilmesi: Ameliyat tipi yaşam kalitesini etkiliyor mu?”, Ankara Cerrahi Dergisi, 7, 87–92, (2005).

17. Ünal B., B.Bozkurt, B. Koçer, M. Karabeyoğlu, E. Özel, C. Yılmaz, L. Albayrak, Ö. Cengiz. “Acil tiroidektomi gerektiren obstruktif, hipertiroidili dev amiloid guatr: Olgu sunumu”, Klinik Bilimler & Doktor (Journal of Clinical Sciences & Doktor) 11, 151–154, (2005).

18. Koçer B., B. Ünal, S. Aydın, B. Bozkurt, O. Yıldırım, A. Eroğlu, M. Karabeyoğlu, Ö. Cengiz. “Yaşlı hastalarda gözlenen tiroid patolojileri, cerrahi prosedür seçimi ve komplikasyon oranları”, Diyaliz, Transplantasyon ve Yanık, 16, 41–47 (2005).

19. Bozkurt B., B.Sülü, B. Ünal, B. Koçer, O. Yıldırım, M. Karabeyoğlu, A. Eroğlu, Ö. Cengiz. “Erken evre meme kanserli hastaların SF–36 ile yaşam kalitesinin değerlendirilmesi: Ameliyat tipi yaşam kalitesinin etkiliyor mu?”, Klinik ve Bilimler & Doktor (Journal of Clinical Sciences & Doktor) 10, 286–291 (2004).

20. Soran A., C.Çöl, B.Koçer, L.Chelluri, K.KW.Lee, D.Aydın, S.A.Tisherman. “Can the outcome of acute pancreatitis be improved in intensive care unit? A collaborative study. Yoğun bakımda akut pankreatitin tedavi sonuçları daha iyi olabilir mi? Ortak çalışma”, The Turkish Journal of Gastroenterology, 12, 223–228 (2001).

21. Yıldırım O., A.Soran, G.Kıyak, M.Karabeyoğlu, B.Koçer, Ö.Cengiz. “Ender görülen bir anomali; Umblikal abse olarak ortaya çıkan Urakal Sinüs”, Klinik Bilimler ve Doktor Dergisi, 6, 344–345 (2000).

22. Koçer B, A.Soran, Ö.Cengiz. “Kolorektal Kanserinde Musin Gen ekspresyonu, Derleme”, Ulusal Cerrahi Dergisi, 16,145–155 (2000).

23. Soran A, U.Erkal, B.Koçer, Ö.Cengiz. “Kolorektal kanserli hastalarda SF–36 skalası ile yaşam kalitesinin belirlenmesi”. Kolon ve Rektum Hastalıkları Dergisi, 9, 58- 64 (1999).

Uluslararası Bilimsel Toplantılarda Sunulan ve Bildiri Kitabında (Proceedings) Basılan Bildiriler:

1- The predictive role of SHARP1 and SHARP2 transcription factors in patients with breast cancer upon neoadjuvan chemotherapy. Ozdemir, K (Ozdemir,K.); Kocer, HB (Kocer,H.B.); Eskiler, GG (Eskiler, G. Guney). Breast, Volume 68, S56-S57, Meeting Abstract P110.

2- Cabioğlu, N., Müslumanoğlu, M., İğci, A., Karanlık, H., Tukenmez, M., Gülçelik, M. A., & Kocer, H. B.(2023). Combined Analysis of the MF18-02/03 Neosentiturk Studies: Factors Predicting Recurrence in ycN0/ypN-positive Breast Cancer with Sentinel Lymph Node Biopsy-Or Targeted 9-Axillary Dissection-Alone After Neoadjuvant Chemotherapy. Annals of Surgical Oncology.

3- Cabıoğlu, N., Karanlik, H., Gulcelik, M. A., İgci, A., Muslumanoglu, M., Kocer, H. B., ... & Ozmen, V. (2023). Abstract PD15-01: PD15-01 AXILLARY NODAL RECURRENCE IS RARE IN PATIENTS WITH NODE-POSITIVE BREAST CANCER UNDERGOING SLNB FOLLOWING NEOADJUVANT CHEMOTHERAPY: EARLY RESULTS OF THE NEOSENTITURK-TRIAL/MF-18-03. Cancer Research, 83(5_Supplement), PD15-01.

4- Axillary recurrence is rare in patients undergoing sentinel lymph node biopsy following neoadjuvant chemotherapy in initially clinically node-positive breast cancer: early results of the neosentiturk-trial/MF18-03. N. Cabioğlu, H. Karanlik, MA Gülcelik, A. İgci, M. Muslamanoglu, HB Kocer, C. Uras, GG Akgül, M. Tulenmez, S. Bademler, S. Ilgun, DC Trablus, GK Çakmak, A. Dag, B. Zengel……….. MF18-03 17.11.2022revf. San Antonio Breast Cancer Symposium- December 6-10, 2022.

5- OP14 - Axillary treatment of early breast cancer patients in the era of ACOSOG Z0011. Baris Mantoglu, Yesim Akdeniz, Belma Kocer. Uluslararası Katılımlı 3. Ulusal Meme Cerrahisi Kongresi, & 6. International Senaturk May Day. 28-31 May 2021.

6- To what extent has pandemic changed the treatment and approach of breast cancer? A single-center experience. Baris Mantoglu, Ahmet Tarik Harmantepe, Havva Belma Kocer. Breastanbul 4th International Istanbul Breast Cancer Virtual Conferance October 17-18 2020.

7. Hayrullah Yıldırım,Musa İlgöz, Kayhan Özdemir, Belma Kocer. Latissimus Dorsi Flap Reconstruction: Who may benefit from it?. Breastanbul Conference. 11-13 October 2018, İstanbul, Turkey.

8. Kayhan Özdemir, Merve Yiğit, Burak Kamburoğlu, Mertcan Akçay, Havva Belma Koçer. PS-219. A rare case in diverticular disease: Ileal Diverticulosis Perforation. 5th İntercontinental Emergency Medicine Congress International Critical Care and Emergency Medicine Congress. 14. Ulusal Acil Tıp Kongresi.19-22 Nisan 2018, Antalya.

9. Kayhan Özdemir, Burak Kamburoğlu, Mertcan Akçay, Havva Bema Koçer. PS-221. A rare cause of small bowel obstruction: Mesenteric Band. 5th İntercontinental Emergency Medicine Congress International Critical Care and Emergency Medicine Congress. 14. Ulusal Acil Tıp Kongresi.19-22 Nisan 2018, Antalya.

10. Yeşim Akdeniz, Kayhan Özdemir, Mertcan Akçay, Havva Belma Koçer. PS-211. A rare Case: Myxoma caused by small intestine (Mesothelium). 5th İntercontinental Emergency Medicine Congress International Critical Care and Emergency Medicine Congress. 14. Ulusal Acil Tıp Kongresi.19-22 Nisan 2018, Antalya.

11. Mertcan Akçay, Kayhan Özdemir, Enes Baş, Havva Belma Koçer. PS-215. A Rare İleus Cause: Small Intestinal Fibroid Polyp. 5th İntercontinental Emergency Medicine Congress International Critical Care and Emergency Medicine Congress. 14. Ulusal Acil Tıp Kongresi.19-22 Nisan 2018, Antalya.

12. Yasin Alper Yıldız, Yeşim Akdeniz, Ali Muhtaroğlu, Mertcan Akçay, Havva Belma Koçer. PS-202. Solid Psudopapiller Tumour of the Pancreas, Case Presentation; 5th İntercontinental Emergency Medicine Congress International Critical Care and Emergency Medicine Congress. 14. Ulusal Acil Tıp Kongresi.19-22 Nisan 2018, Antalya.

13. Kocer B, B. Unal, N. Yazihan, S. Surmeli, O. Cengiz, H. Ataoglu, A. Soran. The risk factors for breast related lymphedema; is vascular endothelial growth factor (VEGF) one of them ? European Journal of Cancer Supp. (5), 4; 218 (2007).

14. Soran A, Evrensel T, Ahrendt G, Kocer B, Bonaventura M, Falk J, Keenan D, Johnson R. Evaluation of the sentinel node nomogram for prediction of non-sentinel node-involvement in patients undergoing neoadjuvant chemotherapy. 29th Annual San Antonio Breast Cancer Symposium, December 14–17, 2006, Breast Cancer Research and Treatment (100): S85-S85 (2006).

15. Koçer B., N. Yazihan, S. Sürmeli, B. Unal, S.Aksaray, O. Cengiz, H. Ataoglu, A. Soran. The importance of sera IGF-I and VEGF-C/D ratio in lymph node metastasis. Breast Cancer Research and Treatment, 100 (1), P1012, 2006. 29th Annual San Antonio Breast Cancer Symposium, December 14–17, 2006, Breast Cancer Research and Treatment, (100); S42-S42 (2006).

16. Soran A., T. Evrensel, G. Ahrendt, B. Koçer, M. Bonaventura, J. Falk, D. Keenan, R. Johnson. What is the predicted probability of having positive non-sentinel lymph nodes in patients who received neoadjuvant chemotherapy (NCT) for locally advanced breast cancer ? Annals of Oncology, 17(9) 2006. 31st ESMO Congress, 29 September -3 October 2006, İstanbul, Turkey. Annals of Oncology (17); 98–98, (2006).

17. Koçer B., N. Yazıhan, S. Sürmeli, B. Ünal, S. Aksaray, Ö.Cengiz, H. Ataoğlu, A. Soran. VEGF-C/D ratio is an important predictive factor to determine lymph node metastasis in breast cancer. Annals of Oncology, 17(6), 2006. 31 st ESMO Congress 29 September -3 October 2006, İstanbul, Turkey. Annals of Oncology (17); 80–80, (2006).

18. Koçer B, S. Aksaray, B. Altun, S. Sürmeli, E. Guvener, Ö.Cengiz. “Serum Neopterin levels in patients with gastric carcinoma”. 15th World Congress of The International Association of Surgeons and Gastroenterologist (and Oncologist), Hepato-Gastroenterology. Suppl. I, 52, T05-P–15, Praque, September 7–10, 2005.

19.Koçer B, B.Altun, M.Balcı, S. Sürmeli, B. Ünal, M.Karabeyoglu, A.Eroğlu, Ö.Cengiz. “Serum C-reactive protein and interleukin–6 reflect disease status of gastric cancer”. 15th World Congress of the International Association of Surgeons and Gastroenterologist (and Oncologist), Hepato-Gastroenterology. Suppl. I, 52, T05-P–14. Praque, September 7–10, 2005.

20. Karabeyoglu M, B.Bozkurt, B.Koçer, B.Ünal, M.Dolapcı, Ö.Cengiz. “Quality of life in patients undergoing inguinal repair: Non-mesh suture repair vs. Lichtenstein Procedure”. International Surgical Week, PP2872, Durban, South Africa, 21–25 August 2005.

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

22. Yıldırım O, C. Solak, B. Koçer, B. Unal, B. Bozkurt, S. Aksaray, Ö. Cengiz. “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.

23. Bozkurt B, B. Ozdemir, B. Koçer, B. Unal, 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.

24. Koçer B, C. Solak, E. Özel, B.Bozkurt, B. Ünal, O. Yıldırım, Ö. Cengiz. “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.

25. Koçer B, J.McKolanis, OJ. Finn. “Humoral immune response to MUC5AC in patients with colorectal polyps and carcinoma patients”. 13th World Congress of The International Association of Surgeons and Gastroenterologists, Hepatogastroenterology, 50, Suppl. I, OP25, Lisbon, Portugal, December 2003.

26. Erel S., B.Koçer, O.Yıldırım, B.Bozkurt, M.Karabeyoğlu, A.Eroğlu, B.Ünal, Ö.Cengiz. “Nonoperative treatment of Traumatic pancreatic pseudocyst: Unusual Soccer Injury”. Turkish Journal of Trauma & Emergency Surgery, 5 th European Congress of Trauma and Emergency Surgery, OP410, İstanbul, 1 Ekim 2002.

27. Soran A, S.Erel, B.Koçer, O.Yıldırım, M.Karabeyoğlu, O.Cengiz. “Is Scoring System a Predictive Factor for Hospitalization Stay Length of Patients with Acute Pancreatitis (AP) ?”. SMA’s 96th Annual Scientific Assembly, Southern Medical Journal, 95, Suppl 2, S4-E Washington, USA, November 13–16, 2002.

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

29. 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: Its Relationship with Prognosis”. 12th World Congress of International Association of Surgeon & Gastroenterologist, Hepatogastroenterology, 49, Suppl. II, OP153, İstanbul, October 30th- November 2nd, 2002.

30. Bozkurt B., B.Koçer, A.Eroglu, O.Yıldırım, M.Karabeyoglu, Ö.Cengiz. “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, İstanbul, September 22–26, 2001, Istanbul.

31. Koçer B., A.Soran, Ö.Cengiz. “Does MUC2 expression in Colorectal Carcinoma affect prognosis? A review of 41 patients”. SMA’s 95th Annual Scientific Assembly, Southern Medical Journal 94, Suppl. 2, OP GAS3, , November 8–10, 2001.

32. Koçer B, B.Bozkurt, B. Ünal, M. Karabeyoğlu, O.Yıldırım, A.Eroğlu, Ö. Cengiz. “60 yaşın üzerindeki Kolorektal Kanserli Hastalarda Klinikopatolojik Parametreler ve Prognoz Farklılık Gösteriyor mu?”. 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.

33. Koçer B., B.Bozkurt, B. Ünal, O.Yıldırım, M. Karabeyoğlu, A Eroğlu, Ö. Cengiz. “Kolorektal Kanserli Hastalarımızda Nüks ve Sağkalımı Etkileyen Faktörler”. 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.

34. Soran A., I.Renklicay, B.Koçer, M.Ulaş, G.Kıyak, O.Yıldırım, A.Eroğlu, Ö.Cengiz. “Is the quality of life superior after tension free herniorrhaphy?”. 4th Annual Meeting European Society of Surgery, PP351, Krakow, Poland, December 3rd – 6th 2000.

35. Ünal B., A. Soran, B.Koçer, M.Ulaş, M. Karabeyoğlu, B. Bozkurt, Ö. Cengiz. “The relation of thyroid volume with thyroidectomy complications”. 4th Annual Meeting European Society of Surgery, PP319, Krakow, Poland. December 3rd – 6th 2000.

36. Soran A., B.Koçer, S. Erdogan, B.Bozkurt, A.Eroğlu, Ö.Cengiz. “The importance of MUC5AC gene expression in colorectal carcinoma”. Joint Meeting of Israel Society of Colon and Rectal Surgery and Mediterranean Society of Coloproctology, OP92, Nazareth, Israil, September 24–27, 2000.

37. Bozkurt B., G.Kıyak, A.Soran, B.Koçer, Ö.Cengiz. “Factors influencing cosmetic outcome after breast conservative surgery and patients evaluation with SF–36 scale for early stage breast carcinoma”. X. Anniversary of Eurosurgery 2000, OP231, Turkey, 20–24 June 2000.

38. Soran A., B.Koçer, S.Erdoğan, O.Yıldırım, Ö.Cengiz. “MUC2 gene expression in colorectal carcinoma”. X. Anniversary of Eurosurgery 2000, OP133, Turkey, 20–24 June 2000.

39. Soran A., S.Erel, B.Koçer, M.Ulaş, F.Coşkun, Ö.Cengiz. “Karaciğerde Enflamatuar Pseudotumör: Olgu sunumu”. 3.Uluslararası Avrasya Gastroenteroloji Kongresi, OP103, Antalya, 10–15 Eylül 1999.

40. 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, The British Journal of Surgery, 85, Suppl.2, PP16, Budapest, 1998.