Medical School
Pamukkale University School of Medicine, 1996-1999
Dokuz Eylül University School of Medicine, 1993-1996

Post-Graduate Training
Istanbul Lütfi Kırdar Kartal Training and Research Hospital, 2001-2005

Professional Experience
Private Medicana International Istanbul Hospital, 2016-Present
Private Memorial Diyarbakır Hospital, 2012-2016
İzmir Atatürk Training and Research Hospital, Radiation Oncology Clinic, 2009-2012
GATA Radiation Oncology Clinic, 2008-2009
İzmir Atatürk Training and Research Hospital, Radiation Oncology Clinic, 2005-2008
Istanbul Lütfi Kırdar Kartal Training and Research Hospital, Radiation Oncology Clinic Specialty Training, 2001-2005
Mardin Mazıdağı Health Center, 1999-2001 

Medical Interests
Breast Tumors,
Prostate Tumors,
Lung Tumors,
Stereotactic Radiosurgery,
Stereotactic Body Radiotherapy 

Special Experience
Breast Tumors, 
Prostate Tumors, 
Lung Tumors, 
Stereotactic Radiosurgery, 
Stereotactic Body Radiotherapy.

Scientific Publications

International Publications:
A.1 M.O.Tarhan, L.Demir, I.Somalı, S.Yigit, C.Erten, A.Alacacıoglu, H.Ellidokuz, O.O.Seseogullari, Y.Kucukzeybek, A.Can, A.Dirican, V.Bayoglu, M.Akyol. ''The clinicopathological evaluation of the breast cancer patients with brain metastases: predictors of survival'' Clinical Experimental Metastasis February 2013 .Volume 30. pp 201-213
A.2 M.E.Kocak, A.Sengul, K.Ekici, A.Olmezoglu, O.Sesesogullari ''Fractionated stereotactic radiosurgery for vestibular schwannomas using cyberknife: A single institution experience'' JPMA. The Journal of the Pakistan Medical Association (01.sep 2016 , 66(9) : 1089-1093
A.3. C.Gemici, G.Yaprak, S.Ozdemir, T.Baysal, O.O.Seseogullari and H.Ozyurt
“Volumetric decrease of pancreas after abdominal irradiation, it is time to consider pancreas as an organ at risk for radiotherapry planning” BMC 2018 13:238
A.4. G.Yaprak, C.Gemici, S. Temizkan, S.Ozdemir, B. Cinkit Dogan, O.O.Seseogullari
“Osteoporosis development and vertebral fractures after abdominal irradiation in patients with gastric cancer” BMC (2018) 18:972
A.5. G.Yaprak, C.Gemici, O.O.Sesogullari, İ.S Karabağ, N.Çini
“CT derived hounsfield unit:An easy way to determine osteoporosis and radiation related fracture risk in irradiated patients”
A.6. G.Yaprak, C.Gemici, O.O.Sesogullari, S.Ozdemir, T.Baysal, H.Özyurt (Springer Nature, 03.12.2018)
“Volumetric decrease of pancreas after abdominal irradiation, it is time to consider pancreas as an organ at risk for radiotherapy planning”
A.7. G.Yaprak, O.O.Seseogullari, B.Dogan Akaslan, N.Işık (Zerbinis Medical Publications, 2019)
“Is stereotactic body radiotherapy an alternative to surgery in early stage non small cell lung cancer?”
B.1. C.Gemici, O.Demır, T.Salepci, M.Gumus, A.Mayadaglı, O.O.Seseogullari ''Uracil-tegafur (UFT) based radiochemotherapy in adjuvant treatment of resected high risk gastric cancer'' . Journal Of Clinical Oncology . 2005 ASCO Annual Meeting Proceedings 23,no 16 Supplement (June 2005) 4175
B.2. C.Gemici, A.Mayadaglı, T.Salepci, G.Yaprak, O.O.Sesesogullari ''Preoperetive radiation in combination with uracil/tegafur (UFT) and mitomycin C (MMC) in locally advanced rectal adenocarcinoma''. Journal Of Clinical Oncology . 2006 ASCO Annual Meeting Proceedings 24, no 18 Supplement (June 2006) 13512
B.3. A.Mayadagli, O.O.Seseogullari, C.Gemici, A.Ozkan, C.Parlak, E.Gocen ''Late term renal complications related to chemoradiotherapy in patients with gastric cancer''. Journal Of Clinical Oncology. 2007 ASCO Annual Meeting Proceedings 25, no 18 Supplement (June 2007) 15033
C.1. G.Yaprak,O.O.Seseogullari , H.B Çevik, S.Gümüştaş, R. Demirhan. Prognostic factors in soft tissue sarcoma patients treated with pre or post radiotherapy. SCIE. 2018;29(2): 69-74
C.2. G.Yaprak, A.K.Kılıç, N.Işık, D.Çelik Yaprak, O.O.Seseogullari “Effıcient Treatment of Resistant Orbital Pseudotumor with CyberKnife: Case Series and Short Review of Literature” SCIE DOI: 10.14744/scie.2018.92400
C.3. A.Mayadaglı, S.Peksu, N.Ozseker, K.Cepni, O.O.Seseogullari. N.Dizdar. ''Nüks Ekrin Porokarsinoma : Olgu Sunumu'' Kartal Education And Research Hospital Medical Journal, 2003. 14 (3) 184-187
C.4. A.Mayadaglı, O.O.Seseogullari, H.Tepetam, Z.Ozgen, K.Cepni, M.L.Akın. "Recurrent Malignant Phyllodes Tumor of the Breast and Radiotherapy: A Case Report" Kartal Education and Research Hospital Medical Journal, 2004, 15(2), 103-104.
C.5.G.Yaprak,M.Özçelik, C.Gemici, O.O.Seseogullari '' Pretreatment SUVmax value to predict outcome in patients with stage III NSCLC receiving concurrent chemoradiotherapy North Clin Istanb. 2019; 6(2): 129-133 | DOI: 10.14744/nci.2019.02212
C.6. G.Yaprak, M.Ozcelik, C.Gemici, O.O.Sesogullari (Istanbul Provincial Health Directorate, 2019)
“Pretreatment SUVmax value to predict outcome in patients with stage III NSCLC receiving concurrent chemoradiotherapy”
D.1. S.Ozturkcan, E.Eren, S.Dıncer, S.Akbas, S.M.Basoglu, G.A. Bıngolballı, O.O.Seseogullari, A.Olmezoglu . Assessment of Auditory Outcomes in Cyberknife Treatment of Vestibular Schwannoma. Turkish Journal of Otorhinolaryngology" 
XXXV. Ulusal Kongre Özetleri PS2-029

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