Page 46 - Best Doctors in Turkey — Get an Online Consultation

Dr. Isik Okuyan is an obstetrics and gynecology specialist at Memorial Göztepe Hospital in Istanbul (2025–present). He previously worked at Şanlıurfa Training and Research Hospital (2023–2025). He completed his OB/GYN residency at SB University Istanbul Training and Research Hospital (2019–2023). He earned his MD from Mersin University (2011–2017).

His credentials include GESEA Level 1 in Gynecological Endoscopy (Marseille, 2024). He presented a video and a poster at the 33rd ESGE Congress (2024). He is a member of the Turkish Medical Association, the Turkish Society of Gynecology and Obstetrics, and ESGE. He took part in meetings from 2022 to 2025, including ISON and national gynecology congresses.

Dr. Berrak Beyoglu Oruc is a specialist in obstetrics, gynecology, and IVF at Memorial Göztepe Hospital (2025–). She previously worked at Bahçeşehir University Medical Park Göztepe Hospital and Ağrı Training and Research Hospital. She also served as a research physician in gynecologic oncology at Bologna University S. Orsola (2022).

Accreditations and key training include: Certified ART Clinical Training, American Hospital (2025); GESEA MIGS Level 1 – European Certified Minimal Invasive Gynaecological Surgeon (2024). She also completed the Harvard Women’s Health and Menopause Course (2025), ESGO ORSI Robotic Surgery (2022), ESGO Masterclass (2022), and TMFTP Second Trimester Ultrasound (2024).

Awards: First prize, oral presentation—Transperineal Ultrasonography in Predicting Operative Delivery (13th Maternal–Fetal Medicine and Perinatology Congress, 2023). Third prize—Aortic Dissections (2016). Memberships: ISUOG, ESGE, MIJID, TJOD.

Assist. Op.Dr.Oğuzhan Parlakkılıç graduated from Atatürk University Faculty of Medicine in 2001.

He started his specialization in the urology clinic of Taksim Training and Research Hospital in 2002. Having completed his specialization training in 2007, Dr. Oğuzhan Parlakkılıç attended many national and international meetings. He has studies in andrology, endourology and urooncology.

Between 2007 and 2009, he completed his duty of public service obligation at Sivelek State Hospital.

Between 2009 and 2010, he worked as a urology specialist in the General Command of Mapping Dispensary. 

Onat ÜZÜMCÜGİL, M.D. Prof.

Orthopedics and Traumatology 

Fields of Interest

Spinal Disorders

Postural Disorders

Spine Based Pain Syndromes

Scoliosis/Kyphosis Surgery

Spondylolisthesis 

Spinal Stenosis

Spine Trauma

Shoulder Joint Disorders

Arthroscopic (closed) Rotator Cuff Repair

Arthroscopic (closed) Instability Surgery

Arthroscopic (closed) Frozen Shoulder treatment

Shoulder Girdle Trauma

Shoulder Arthroplasty

Knee Joint Disorders

Arthroscopic (closed) Meniscus Surgery

Arthroscopic (closed) ACL/PCL Reconstruction

Chondral Disorders ( Osteochondral Transfers/ Cell -Based Therapies)

Knee Arthroplasty

Knee Trauma

Regenerative Medicine

BMAC (Bone Marrow Aspirate Concentration)

SVF (Stromal Vascular Fraction)

PRP (Platelet-Rich Plasma) 

Education 

School of Medicine, Istanbul University 

SSK Ankara Training Hospital 

Ministry of Health Istanbul Training and Research Hospital, 

School of Medicine, İstanbul Kemerburgaz University 

Previous Employments 

Orthopedics and Traumatology Clinic I, SSK Ankara Training Hospital 

Diyarbakır Military Hospital 

Department of Orthopedics and Traumatology, Istanbul Training and Research Hospital, Ministry of Health 

Department of Orthopedics and Traumatology, School of Medicine, İstanbul Altınbaş University 

Medicalpark Bahçelievler Hospital

Kolan International Hospital 

Medicana International Istanbul Hospital

Books 

• Sagittal Plane Deformities of Spine, Publications of Turkish Association of Spine, 2016. 
• Hajdu-Cheney Syndrome (Spine-involving Syndromes, Publications of Turkish Association of Spine, 2016) 
• Morquio syndrome (Spine-involving Syndromes, Publications of Turkish Association of Spine, 2016) 
• Scheurmann kyphosis (Sagittal Plane Deformities of Spine, Publications of Turkish Association of Spine, 2016) 
• Posttraumatic kyphosis (Sagittal Plane Deformities of Spine, Publications of Turkish Association of Spine, 2016) 

Scientific Publications and Articles 

1. Articles published in international peer-review journals: 

A1. The three portal (including transpatellar tendon portal) versus two portal technique in the arthroscopic menisectomy procedure for isolated medial bucket-handle type meniscal tears. 

Onat Üzümcügil, Ahmet Doğan, Merter Yalçınkaya, Erhan Mumcuoğlu, Yavuz Kabukçuoğlu Joint Diseases and Related Surgery 2010; 21 (1): 38-43. 

A2. The relationship between anterior knee pain occuring after tibial intramedullary nailing and the localization of the nail in the proximal tibia. 

Onat Üzümcügil, Ahmet Doğan, Merter Yalçınkaya, Yavuz S. Kabukçuoğlu Acta Orthopaedica et Traumatologica Turcica 2009; 43(5): 386-389 

A3. The effect of abductor hallucis tendon release on residual adductus deformity in the surgical treatment of congenital clubfoot 

Ahmet Doğan, Onat Üzümcügil, Merter Yalçınkaya, Gazi Zorer 

Acta Orthopaedica et Traumatologica Turcica 2009; 43(6): 491-496. 

A4. The use of a cementless modular stem in the treatment of subtrochanteric femoral fractures in conjunction with ipsilateral coxarthrosis.

Yusuf Öztürkmen, Onat Üzümcügil, Erhan Şükür, Mahmut Karamehmetoğlu, Mustafa Caniklioğlu Orthopedics 2011 January;34(1):13 

A5. AperFix versus transfix in reconstruction of anterior cruciate ligament. Uzumcugil O, Dogan 

A, Dalyaman E, Yalcinkaya M, Akman E, Ozturkmen Y, Caniklioglu M. J Knee Surg. 2010 Mar;23(1):2935 

A6. Results of “two above-one below approach” with intermediate screws at the fracture site in the surgical treatment of thoracolumbar burst fractures. 

Onat Uzumcugil, Ahmet Dogan, Mehmet Yetis, Merter Yalcinkaya, Mustafa Caniklioglu Kobe Journal of Medical Sciences, 2010; 56(2):67-78 

A7. Asymmetric bilateral traumatic dislocation of the hip joint: a case report 

Nikola Azar, Merter Yalçınkaya, Yunus Emre Akman, Onat Üzümcügil, Yavuz S. Kabukçuoğlu Joint Diseases and Related Surgery 2010;21(2);118-121 

A8. Clinical results of intramedullary nailing following closed or mini-open reduction in pediatric unstable diaphyseal forearm 

Merter Yalçınkaya, Ahmet Doğan, Ufuk Özkaya, Sami Sökücü, Onat Üzümcügil, Yavuz Kabukçuoğlu Acta Orthopaedica et Traumatologica Turcica, 2010 44(1):7-13 

 A9. Clinical Importance of Femoral and Tibial Tunnel Localizations in Arthroscopic Anterior Cruciate Ligament Reconstruction 

Onat Üzümcügil, Ahmet Doğan,Merter Yalçınkaya, Y.Emre Akman, Erhan Mumcuoğlu, Nikola Azar Joint Diseases and Related Surgery 2009; 20 (1): 25-31 

A10. A comparison of percutaneous and mini-open techniques of Achilles tenotomy: an experimental study in rats. 

Ahmet Dogan, Onat Uzumcugil, Bartu Sarisozen, Bulent Ozdemir, Y.Emre Akman, Ergun Bozdag, Emin Sunbuloglu, Erol Bozkurt 

Journal of Children’s Orthopaedics 2009; 3: 485-491 

A11. Congenital pseudoarthrosis of the clavicle in two siblings 

Y.Emre Akman, Ahmet Doğan, Onat Üzümcügil, Nikola Azar, Erhan Dalyaman, Yavuz Kabukçuoğlu Acta Orthopaedica et Traumatologica Turcica 2008; 42(5): 377-381 

A12. Results of complete hemivertebra excision followed by circumferential fusion and anterior or posterior instrumentation in patients with type-IA formation defect , 

1. Teoman Benli , Erbil Aydın, Ahmet Alanay, Onat Uzumcugil, Osman Buyukgullu, Mahmut Kıs European Spine Journal, Volume 15, Number 8 / August, 2006:1219-1229 

A13. Magnetic Resonance Imaging Abnormalities of Neural Axis in Lenke Type 1 Idiopathic Scoliosis, 

Benli I. Teoman, Uzumcugil Onat, Aydın Erbil, Ates Bulent, Gurses Levent, Hekimoglu Baki Spine, 31(16):1828-1833, July 15, 2006 

A14. Evaluation of shoulder balance through growing rod intervention for early-onset scoliosis 

Onat Uzumcugil, Yunus Atici, Yusuf Ozturkmen, Merter Yalcınkaya, Mustafa Caniklioglu J Spinal Disorders and Techniques 2012 Oct;25(7):391-400. 

A15. Effect of PEEK polymer on tunnel widening after hamstring ACL reconstruction.Uzumcugil O, Yalcinkaya M, Ozturkmen Y, Dikmen G, Caniklioglu M.Orthopedics. 2012 May;35(5):e654-9. Doi: 

10.3928/01477447-20120426-18. 

 A16. Clinical and radiological outcome of the growing rod technique in the management of scoliosis in young children 

Mustafa Caniklioglu, Alper Gokce, Yusuf Ozturkmen, Nevzat Selim Gokay, Yunus Atıcı, Onat Uzumcugil

Acta Orthopaedica et Traumatologica Turcica 2012; 46(5): 379-384 

A17. The results of closing wedge osteotomy with posterior instrumented fusion for the surgical treatment of congenital kyphosis. Atici Y, Sökücü S, Uzümcügil O, Albayrak A, Erdoğan S, Kaygusuz MA. Eur Spine J. 2013 Mar 28. [Epub ahead of print] 

A18. Total knee arthroplasty for the management of joint destruction in tuberculous arthritis 

Oztürkmen Y, Uzümcügil O, Karamehmetoğlu M, Leblebici C, Caniklioğlu M.Knee Surg Sports Traumatol Arthrosc. 2013 Mar 21. [Epub ahead of print] 

A19. [Treatment of a pregnant patient with bilateral traumatic bimalleolar ankle fracture: a case report]. Atıcı Y, Üzümcügil O, Yalçınkaya M, Atıcı A, Kabukçuoğlu YS, Öztürkmen Y.Joint Disease Surgery. 2013 Apr;24(1):53-7. doi: 10.5606/ehc.2013.13. Turkish. 

A20. A comparison of continuous femoral nerve block and periarticular local infiltration analgesia in the management of early period pain developing after total knee arthroplasty. 

Kovalak E, Doğan AT, Üzümcügil O, Obut A, Yıldız AS, Kanay E, Tüzüner T, Özyuvacı E. 

Acta Orthop Traumatol Turc. 2015;49(3):260-6. doi: 10.3944/AOTT.2015.14.0263. 

A21. Sciatic nerve compression by an extrapelvic cyst secondary to wear debris after a cementless total hip arthroplasty: A case report and literature review. Mert M, Oztürkmen Y, Unkar EA, Erdoğan S, Uzümcügil O. 

Int J Surg Case Rep. 2013;4(10):805-8. doi: 10.1016/j.ijscr.2013.07.008. Epub 2013 Jul 29. 

1. Abstracts-full texts presented in local and international scientific meetings and published in proceedings 

B1. Comparison of single and dual growing rod techniques in terms of shoulder balance in the surgical treatment of early onset scoliosis 

Onat Üzümcügil, Yunus Atıcı, Yusuf Öztürkmen, Merter Yalçınkaya, Mustafa Caniklioğlu 

9th International Turkish Spine Congress April 27-30 2011, OP25, abstract book page no:25, Istanbul,Turkey 

B2. Posterior selective fusion in Lenke Type 1 adolescent idiopathic scoliosis 

Yunus Atıcı, Onat Üzümcügil, Özgür Çetinkaya, Merter Yalçınkaya, Murat Mert, Yusuf Öztürkmen, Mustafa Caniklioğlu 

9th International Turkish Spine Congress April 27-30 2011, OP28, abstract book page no:28, Istanbul,Turkey 

B3. Three-rod technique (two rods on concave) in treatment of severe scoliosis 

Yunus Atıcı, Murat Mert, Onat Üzümcügil, Sinan Erdoğan, Barış Polat, Mustafa Caniklioğlu 

9th International Turkish Spine Congress April 27-30 2011, PP53, abstract book page no:133, Istanbul,Turkey 

B4. Is excessive correction of Lenke Type 1 adolescent idiopathic scoliosis lead to coronal decompensation? 

Yunus Atıcı, Sinan Erdoğan, Murat Mert, Onat Üzümcügil, Abdullah Yener İnce, Barış Polat, Mustafa Caniklioğlu 

9th International Turkish Spine Congress April 27-30 2011, PP60, abstract book page no:140, Istanbul, Turkey 

B5. Coronal and sagittal balance in the treatment of Lenke type 3 adolescent idiopathic scoliosis with posterior fusion 

Kaddafi Duymuş, Merter Yalçınkaya, Onat Üzümcügil, Yunus Atıcı, Özgür Çetinkaya, Hilmi Karadeniz, Mustafa Caniklioğlu 

9th International Turkish Spine Congress April 27-30 2011, PP61, abstract book page no: 141, Istanbul, Turkey 

B6. Pediatric triquetrum fracture: a case report 

Merter Yalcınkaya, Ahmet Dogan, Onat Uzumcugil, Yunus Atici 

30. Meeting of the European Pediatric Orthopaedic Society (EPOS), April 6-9, 2011, E37, Basel, Switzerland.(J Child Orthop(2011) 5 (Suppl 1):S37-S77) 

B7. Long term complications of complete subtalar release technique in the treatment of clubfoot 

Merter Yalçınkaya, Ahmet Dogan, Onat Uzumcugil, Yunus Atici, Gazi Zorer 

30. Meeting of the European Pediatric Orthopaedic Society (EPOS), April 6-9, 2011, 8, Basel, Switzerland.(J Child Orthop(2011) 5 (Suppl 1):S1-S35) 

B8. The early post-operative results in the patients with progressive early onset scoliosis that 

underwent posterior spinal fusion folowing growing rod technique 

Yunus Atici, Yunus Akman, Ali Ozluk, Murat Mert, Ilhan Acıkgoz, Yusuf Ozturkmen, Onat Uzumcugil, 

Engin Carkci, Mustafa Caniklioglu 

3. International Congress on Early Onset Scoliosis and Growing Spine (ICEOS), November 20-21, E-poster 142, Istanbul, Turkey (J Child Orthop (2009) 3:503-533 

B9. Do all the patients who attended to the emergency department with orthopaedic complaints really have urgent conditions? 

Merter Yalçınkaya, Ahmet Doğan, Onat Üzümcügil, Özgür Çetinkaya, Zafer Solak 

10th European Congress of Trauma and Emergency Surgery, May 13-17, 2009, p 55, Antalya, Turkey 

B10. Comparison of mini open and percutaneous intramedullary nailing techniques in paediatric unstable diaphyseal forearm fractures 

Merter Yalcinkaya, Ahmet Dogan, Ufuk Ozkaya, Sami Sokucu, Onat Uzumcugil, Yavuz Kabukcuoglu 

28. Meeting of the European Pediatric Orthopaedic Society (EPOS), April 1-4, 2009, p S78, Lisbon, Portugal 

B11. Greater trochanteric transfer: does it work in all patients with coxa vara deformity? 

Ahmet Dogan, Onat Uzumcugil, Merter Yalcınkaya, Gazi Zorer 

28. Meeting of the European Pediatric Orthopaedic Society (EPOS), April 1-4, 2009, 168, Lisbon, Portugal(J Child Orthop (2009) 3(Suppl 1):S1-S90 

B12. Morphometric characteristics of L5 vertebra in Turkish society. 

1. Emre Akman, Nikola Azar, Merter Yalçınkaya, Onat Üzümcügil, Yavuz S. Kabukçuoğlu, Erhan Mumcuoğlu 

The Journal Of Turkish Spinal Surgery 2008;19 (Supplement-1):89 (8th International Turkish Spine Congress, October 23-26, 2008, Çeşme, İzmir, Proceedings of Congress) 

B13. Place of computed tomography in differentiation of critical /non-critical pedicle and corpus perforations in instrumentation of the lumbar vertebrae with funnel technique. 

Nikola Azar, Y.Emre Akman, Erhan Dalyaman, Onat Üzümcügil, Yavuz Kabukçuoğlu, Ahmet Doğan 

The Journal Of Turkish Spinal Surgery 2008;19 (Supplement-1):72 (8th International Turkish Spine Congress, October 23-26, 2008, Çeşme, İzmir, Proceedings of Congress) 

B14. Outcomes of Anterior Cruciate Ligament Reconstruction 

Hakan Aslan, Tibet Altuğ, Onat Üzümcügil, Çağlar Koçer 

7th Congress of Turkish Society of Sports Traumatology Arthroscopy and Knee Surgery Combined with the 3rd Congress of Asia Pacific Knee Society, November 01-04, 2004, free paper 20, abstract book, page number: 30, Ankara, Turkey 

1. Articles published in local peer-review journals:

D1. Unusual clinical picture of superior gluteal artery injury: Case report 

Yusuf Öztürkmen, Merter Yalçınkaya, Onat Üzümcügil, Mahmut Karamehmetoğlu Journal of TSOT 2011;10(4);331-334 

D2. Posterior selective fusion in Lenke Type 1 adolescent idiopathic scoliosis 

Yunus Atıcı, Onat Üzümcügil, Özgür Çetinkaya, Merter Yalçınkaya, Murat Mert, Yusuf Öztürkmen, Mustafa Caniklioğlu 

Turkish Journal of Spinal Surgery, 2011;22(2):87-98 

D3. Outcomes of implantation of posterior pedicle screw alone in surgical treatment of Scheuermannʼs kyphosis. 

Onat Üzümcügil, Yunus Atıcı, Kaddafi Duymuş, Ali V. Özlük, Erhan Şükür, Mustafa Caniklioğlu Turkish Journal of Spinal Surgery 2010; 21(2): 137-146 

D4. Comparison of posterior spinal correction and fusion with hybrid-system instrumentation and pedicle screw in adolescent idiopathic scoliosis. 

Onat Üzümcügil, Yunus Atıcı, Kaddafi Duymuş, Erhan Şükür, Merter yalçınkaya, Murat Mert, Mustafa Caniklioğlu

Turkish Journal of Spinal Surgery 2010; 21(1): 29-38   

D5. Our mid-term outcomes in surgical treatment of pediatric supracondylar humeral fractures with medial approach 

Onat Üzümcügil, Ahmet Doğan, Mehmet Yetiş, Nikola Azar, Merter Yalçınkaya, Yavuz Kabukçuoğlu Medical Bulletin, Şişli Etfal Hospital, 2009; 43 (3): 126-130 

D6. Our mid-term outcomes in treatment of tibial diaphyseal fractures with locked intramedullary nailing. 

Onat Üzümcügil, Ahmet Doğan, Merter Yalçınkaya, M.Zafer Dağtaş, Erhan Mumcuoğlu, Yavuz Kabukçuoğlu 

Medical Bulletin, Şişli Etfal Hospital, 2009; 43 (2): 82-88 

D7. Place of computed tomography in differentiation of critical /non-critical pedicle and corpus perforations in instrumentation of the lumbar vertebrae with funnel technique. 

Nikola Azar, Y.Emre Akman, Erhan Dalyaman, Onat Üzümcügil, Yavuz Kabukçuoğlu, Ahmet Doğan 

Turkish Journal of Spinal Surgery 2009; 20(1): 11-16 

D8. Evaluating the relationship between radiological parameters and clinical findings in surgically treated thoracolumbar burst fracture 

Onat Üzümcügil, Y.Emre Akman, Nikola Azar, Mehmet Yetiş, Ahmet Doğan Turkish Journal of Spinal Surgery 2009; 20(2): 63-68 

D9. Long-segment posterior instrumentation following close posterior wedge osteotomy for the treatment of kyphotic deformity in patients with ankylosing spondylitis 

Onat Üzümcügil, Ali Volkan Özlük, Murat Mert, Yunus Atıcı, Mustafa Caniklioğlu, İ. Teoman Benli, Alper Kaya 

Turkish Journal of Spinal Surgery 2009; 20(3): 54-58 

D10. Morphometric characteristics of L5 vertebra in Turkish society. 

1. Emre Akman, Nikola Azar, Merter Yalçınkaya, Onat Üzümcügil, Yavuz S. Kabukçuoğlu, Erhan Mumcuoğlu 

Turkish Journal of Spinal Surgery, 2008;19(4):373-380 

D11. Hajdu-Cheney Syndrome associated with kyphoscoliosis and bilateral toxic synovitis. (Case report) 

İ. Teoman Benli, Onat Üzümcügil, Alper Kaya, Teoman Dönmez 

Turkish Journal of Spinal Surgery, 2006;17(1):25-39 

D12. Outcomes in treatment of Scheurmann Kyphosis with Milwaukee Corset. 

Kerem Kurt, İ. Teoman Benli, Çağlar Koçer, Onat Üzümcügil, Bülent Ateş, Erbil Aydın Joint Diseases and Related Surgery 2005;16(1):20-30 

D13. Treatment of severe scoliosis and kyphoscoliosis with 3-rod technique 

Yunus Atıcı , Onat Üzümcügil , Murat Mert , Sinan Erdoğan , Engin Çarkçı , Barış Polat , Mustafa Caniklioğlu 

 Journal of Turkish Spinal Surgery 2012;23(3):197-204 

D14. Scheurmann Kyphosis 

Onat Üzümcügil , Ethem Ayhan Ünkar , Yunus Atıcı , Ali Volkan Özlük , Murat Mert , Emrah Kovalak , Yusuf Öztürkmen , Mustafa Caniklioğlu 

D15. Clinical outcomes of aseptic thoracolumbar pseudoarthrosis occurred after posterior spinal instrumentation 

 Journal of Turkish Spinal Surgery 2012;23(3):241-252 

Hilmi KARADENİZ , Sinan ERDOĞAN , Yunus ATICI , Onat ÜZÜMCÜGİL , Murat MERT , Engin ÇARKÇI , Gürdal NUSRAN , Erhan ŞÜKÜR 

 Journal of Turkish Spinal Surgery 2013;24(1):47-60 

1. Abstracts-full texts presented in national scientific meetings and published in proceedings 

E1. Relation of aseptic pseudoarthrosis occurred after posterior thoracolumbar instrumentation with number of fused vertebra in scoliosis. 

Hilmi Karadeniz, Onat Üzümcügil, Mustafa Caniklioğlu, Tahir Mutlu Duymuş, Yunus Atıcı, Abdullah Yener İnce 

Orthopedics and Traumatology İstanbul Meeting, May 4-7, 2011, SS33, Proceedings, page no: 57, İstanbul, Turkey 

E2. Our outcomes of internal fixation in treatment of fractures following splitting of humeral head in adolescents. 

Yusuf Öztürkmen, Onat Üzümcügil, Mahmut Karamehmetoğlu, Engin Çarkçı, Mustafa Caniklioğlu 

Orthopedics and Traumatology İstanbul Meeting, May 4-7, 2011, PS33, Proceedings book, page no: 133, İstanbul, Turkey 

E3. Open reduction with anterior approach and internal fixation method with Herbert screws in fractures of capitellum 

Mahmut Karamehmetoğlu, Yusuf Öztürkmen, Onat Üzümcügil, Mustafa Caniklioğlu, Sinan Erdoğan 

Orthopedics and Traumatology İstanbul Meeting, May 4-7, 2011, PS31, Proceedings book, page no: 135, İstanbul, Turkey 

E4. Does aperture graft fixation using AperFix device effect tunnel widening after hamstring anterior cruciate ligament reconstruction?: A radiographic comparison of three different fixation devices 

Education and Expertise

Istanbul University Istanbul Faculty of Medicine - 2010

İstanbul Metin Sabancı Baltalimanı Bone Diseases Training and Research Hospital – Orthopedics and Traumatology – 2016

Work experiences

Private Family Hospital

Private Atakoy Hospital

Sancaktepe Health Center

Baltalimanı Bone Diseases Training and Research Hospital

Diyarbakir Selahaddin Eyyubi State Hospital

Subjects He Is Competent And Interested In:

Knee Calcification

Knee pain

Meniscus Tear

Knee Ligament Injuries

Carpal Tunnel Syndrome

Neck pain

Orthopedic Diseases

Shoulder Instability

Shoulder Dislocation

Shoulder pain

Meniscus

Recurrent Shoulder Dislocations

Hip and Knee Prosthesis

Education and Expertise

1996-2002 – Ankara University Faculty of Medicine – Medical Education

2003-2009 – Baskent University Faculty of Medicine, Department of General Surgery – Specialization Training

Experience

2009-2011 – Yüksekova State Hospital, Compulsory Service

2011-2012 – Van/Özalp, 6th Border Regiment, Military Service

2012-2018 – Baskent University Istanbul Health Application and Research Center Hospital

2018-2022 – Istanbul Aydın University Istanbul Health Practice and Research Center Hospital

Courses and Certificates

Selim Anorectal Diseases Course, Turkish Colon and Rectal Surgery Association, Istanbul, 17.12.2016 (National)

Training Program on Istanbul Protocol, Practitioner Training, Van, 06.11.2009-07.11.2009 (International)

Burn Course, Ankara Surgery Association, Başkent University, Ankara, 11.04.2009 (National)

Gazi Hernia Days, Hernia Course, Gazi University, Ankara, 18.10.2008-19.10.2008 (National)

Innovations in Breast Cancer Diagnosis and Treatment, Ankara Breast Diseases Association, Ankara, 22.03.

Dr Önul is FROM THE BEST DOCTORS in the field of Endoscopic skull base surgery and pituitary surgery Brain tumor surgery (Neuro Oncological surgery)


I was born in Artvin in 1977. He became a doctor from KTU Faculty of Medicine in 2001, and Bakırköy Prof. Dr. I became a Neurosurgery Specialist by getting the title of specialist from Mazhar Osman Mental Health and Neurological Diseases Training and Research Hospital. Again, in the same hospital, I was entitled to the title of associate professor in 2016. I continue to work at Başakşehir Çam and Sakura City Hospital, where I voluntarily joined with the task of establishing the Neurosurgery Clinic with my teammates. I am married and have 2 children. I love painting. I am very interested in children's literature. I have 10 printed children's tales

He was born in Giresun-Espiye in 1961. He received his primary and secondary education in Espiye and Trabzon. He started his medical education at Hacettepe University, Trabzon Faculty of Medicine in 1978 and graduated from Karadeniz Technical University Faculty of Medicine in 1985. He did his 2-year compulsory state service as an Emergency Physician in the Emergency Service of Çanakkale State Hospital. In 1987, he started his specialization training at Istanbul University, Cerrahpaşa Faculty of Medicine, Department of Thoracic and Cardiovascular Surgery. He completed my specialization training in 1993 and started to work as a specialist in the same department. Continuing his professional and academic life at Cerrahpaşa Faculty of Medicine, Department of Cardiovascular Surgery, he became a professor and chaired the chair.

During and after his specialization training, he was found in various hospitals in many different countries for vocational training and development purposes. In addition to various fields of Cardiovascular Surgery, he has worked for many years in the fields of cardiovascular traumatology, multi- and interdisciplinary cardiovascular surgery, video-thoracoscopic endoscopic surgery and thoracic surgery.

In addition to his academic and surgical professional studies, he has a master's degree in the field of "Health Institutions Management" and has also held managerial positions such as Head of Cardiovascular Surgery Department at Cerrahpaşa Medical Faculty, Deputy Chief Physician, Istanbul University, Revolving Fund Management.

He is amateurishly interested in social sciences in medicine and in this sentence "Medical Humanities" and "Medical illustration".

He has more than 200 articles published in national and international journals, over 200 international scientific citations, various book chapters on different topics, over 150 scientific studies and speeches presented at various national and international meetings.

Dr. Ahmet Mutlu is an ENT specialist at Memorial Göztepe Hospital (2025–present). He holds European Board certification in ORL‑HNS (FEBORL‑HNS, 2018) and National ENT Board certification (2016). Education: MD, Kocaeli University (2011). ENT residency, Kocaeli University (2011–2016). Master’s in Audiology, Başkent University (2017).

Previous posts: Istanbul Medeniyet University (2019–2025). Üsküdar State Hospital (2016–2019). Kocaeli University (2011–2016). Training: Otology‑Neurotology School (2019–2020). Laryngology & Phoniatrics School (2021–2022). Portmann Institute microsurgery course (2013). Memberships: Turkish ORL‑HNS, Istanbul ENT Assoc., Otology‑Neurotology, Phoniatrics, Turkish Medical Association.

Dr. Mehmet Semih is a cardiology specialist at Memorial Göztepe Hospital (2025–present). He previously served as a specialist at Koşuyolu High Specialty Training and Research Hospital (2024–2025) and Sivas Numune Hospital (2023–2024). He completed his cardiology residency at Istanbul University Cerrahpaşa (2018–2023). He earned his MD at Istanbul University (2006–2012).

He is a member of the Turkish Society of Cardiology, the European Society of Cardiology, and the European Heart Rhythm Association. He has delivered oral case presentations at EHRA and TKD congresses. He also completed the TKD Bifurcation Lesions Management Course and the TKD Echocardiography Symposium.

Dr. Tolga Sinan Guvenc is a cardiologist at Memorial Göztepe Hospital (2025–). He previously worked at VM Medical Park Pendik (2019–2025) and at Dr. Siyami Ersek Thoracic and Cardiovascular Surgery Training and Research Hospital (2014–2018).

He has authored over 200 scientific articles and book chapters. He serves on the Editorial Board of Scientific Reports.

He is a Fellow of the ESC Heart Failure Association. He is also a member of the Turkish Society of Cardiology, the European Society of Cardiology, and Sigma Xi.

Advanced training includes a clinical fellowship in the Advanced Heart Failure Unit at the University of Alberta. He also served as a visiting scientist at the Echocardiography Station at the University of Alabama at Birmingham. Education: MD, Istanbul University Cerrahpaşa (English). Cardiology residency, Dr. Siyami Ersek.

Dr. Muslim Sahin is a cardiology specialist at Memorial Göztepe Hospital (2025–present). He previously worked at VM Medical Park Pendik Hospital (2018–2025), Kartal Koşuyolu High Specialty Training and Research Hospital (2010–2018), Kartal Yavuz Selim State Hospital (2007–2010), and Kayseri Military Hospital (2006–2007).

He completed his cardiology residency at Maltepe University Faculty of Medicine (2001–2005). He earned his MD from Istanbul University Cerrahpaşa Faculty of Medicine (1995–2001).

He is a member of the Turkish Medical Chamber, the Turkish Society of Cardiology, the EuroCTO Club, and the European Society of Cardiology. He has completed training in TAVI, MitraClip, and renal denervation.

Dr. Ahmet Ekmekci is a cardiology specialist at Memorial Göztepe Hospital in Istanbul, since 2025. He earned the title of Associate Professor of Cardiology (Doçent) in 2014.

He served as Chief Assistant in Cardiology at Dr. Siyami Ersek Training and Research Hospital in 2010. He completed his cardiology residency at the same hospital in 2009. He finished his internal medicine residency at the Istanbul Faculty of Medicine from 2002 to 2007. He received his MD from Istanbul University, Istanbul Faculty of Medicine, in 2002.

He is a member of the Turkish Society of Cardiology, the European Society of Cardiology, and the European Heart Failure Association (Gold Member). He is also a member of the Istanbul Internal Medicine Association, the Stem Cell and Cellular Therapies Association, the Istanbul Medical Chamber, and the Turkish Medical Association. He served on the Board of the Turkish Society of Cardiology Heart Failure Working Group in 2016.

Dr. Haluk Caglar Karakaya is a specialist in cardiovascular surgery at Memorial Göztepe Hospital in Istanbul (2025–). He previously worked as a specialist at the University of Health Sciences Sancaktepe Şehit Prof. Dr. İlhan Varank Training and Research Hospital (2022–2025). He completed residency training at the University of Health Sciences Dr. Siyami Ersek Thoracic and Cardiovascular Surgery Training and Research Hospital and at Ankara University. He earned his MD from Hacettepe University (English program).

Professional memberships: European Society for Cardiothoracic Surgery (EACTS), European Society for Vascular Surgery (ESVS), Turkish Society of Cardiovascular Surgery, National Society of Vascular and Endovascular Surgery.

Continuing education: 27th European Vascular Course (2024); Cardiac Memorial Robotic/Minimally Invasive Cardiac Surgery Summit (2024); 18th Turkish Cardiovascular Surgery Congress (2024); 24th ASVS Congress (2023); TKDCD Endovascular Course (2023); “Grey Areas in Vascular Surgery” Symposium (2023); Basic and Advanced Doppler Ultrasonography Course (2023).

Dr. Nezih Onur Ermerak is a Thoracic Surgery Specialist at Memorial Göztepe Hospital (2025–). He previously worked in the Department of Thoracic Surgery at Marmara University (2009–2025). He also served at Kilis State Hospital during compulsory service and war surgery (2015–2017).

He completed a Thoracic Surgery fellowship at Washington University in St. Louis (2019–2020). He then completed a Thoracic & Esophageal Surgery fellowship at Dalhousie University (2020–2022). He held a visiting fellowship at Universitätsspital Bern (2011–2012). He finished his residency at Marmara University (2009–2015).

He is President of the Turkish Society of Chest Wall Deformities and Pectus. He served on the Organizing Committee of CWIG 2023 in Istanbul. He completed MI-STARs (2020), MITS (2019), CITI (2024), and KOÇ Laboratory Animal Use certification (2025). He attended the AATS 103rd meeting (2023) and European Thoracic Surgery conferences (2024 and 2025).

Education and Expertise

Istanbul University Istanbul Faculty of Medicine

Istanbul Suleymaniye Gynecology Training and Research Hospital

Dr. Zeynep Alkin is a Professor of Ophthalmology. She specializes in medical retina and vitreoretinal surgery. She earned her medical degree at Istanbul University. She completed her residency at Beyoglu Eye Training and Research Hospital. Dr. Alkin later served as an Assistant Professor and Clinical Fellow in retina departments. She also completed a research fellowship at Doheny Eye Institute, USC. She is a member of the Turkish Ophthalmological Society and its Medical and Surgical Retina Boards.

Dr. Alkin has given over 40 presentations at national and international meetings. She has authored more than 40 peer-reviewed publications. Her main interests are retinal diseases, diabetic macular edema, and age-related macular degeneration. Her research includes multicenter studies and real-world data analyses. Dr. Alkin’s work supports evidence-based practice in ophthalmology.

Education and Expertise

(1994 – 2000) - GATA Faculty of Medicine Ankara

(2003 – 2007) - GATA Medical Faculty Pediatrics and Diseases

(2008 -2011) - Ankara University Pediatric Endocrinology

(03.03.2014) - Associate Professorship, Pediatric Endocrinology

(17.07.2019) - Professorship, Istinye University Faculty of Medicine

Experience

(2001 – 2003) - Special Forces Command/Ankara

(2007 – 2008) - Etimesgut Military Hospital/Ankara

(2011 – 2013) - GATA Medical Faculty Hospital/Ankara

(2013-2015) - GATA Haydarpasa Training Hospital/Istanbul

(05.2015-09.10.2017) - May 2015-09.10.2017 - Süleymaniye Gynecology and Pediatrics Training and Research Hospital/Istanbul

(07.2015 – 01.2016) - Suleymaniye Gynecology and Pediatrics Training and Research Hospital Pediatrics Administrative Responsibility/Istanbul

01.2016 - 09.11.2017 - Suleymaniye Gynecology and Pediatrics Training and Research Hospital Pediatric Clinic Education Responsibility / Istanbul

(03.03.2016 - 30.10.2017) - Süleymaniye Gynecology and Pediatrics Training and Research Hospital Management

(2017-2020) - Istinye University Faculty of Medicine Faculty Member

(2020-Present) - Istanbul Aydın University Faculty of Medicine Faculty Member

(20.10.2020-Present) - Head of Department of Child Health and Diseases, Faculty of Medicine, Istanbul Aydın University

Courses and Certificates

2001 - Flight Doctor Course

2010 - Project Management Training Course

2013 - Basic Epidemiology course

2018 - Trainer Training Course

Professional Memberships

Pediatric Endocrinology and Diabetes Association

European Society of Pediatric Endocrinology (ESPE)

Istanbul Medical Chamber

Awards

İhsan Turan, Ian Hutchins, Bülent Hacıhamdioğlu, Leman Damla Kotan, Fatih Gürbüz, Mehmet Taştan, Ayça Ulubay, Eda Mengen, Bilgin Yüksel, Susan Wray, Ali Kemal Topaloğlu. CCDC141 Mutation in idiopathic hypogonadotropic hypogonadism. XVI. First Prize in Oral Presentation at the National Pediatric Endocrine and Diabetes Congress.

Bülent Hacıhamdioğlu, Gönül Öçal, Merih Berberoğlu, ZeynepŞıklar, Ercan Tutar, Suat Fitöz, Gökhan Nergizoğlu, Şenay Savaş Erdeve, Emine Çamtosun. Control of premature microvascular aging and cardiovascular performance in obese adolescents. XVI. was held in Samsun on 6-10 November 2012. Second Prize in Oral Presentation at the National Pediatric Endocrine and Diabetes Congress.

Z. Siklar, G. Ocal, M. Berberoglu, B. Hacıhamdioğlu, Ş. Savas Erdeve, Y. Egin, N. Akar. Control of hypercoagulability caused by obesity in children with endothelial microparticle level and thrombin generation test, and the relationship between risk and metabolic parameters. First Prize in Oral Presentation at the 55th Turkish National Pediatrics Congress held in Antalya on 12-16 October 2011

Z. Şıklar, V. Topçu, P. Kocaay, M. Berberoğlu, B. Hacıhamdioğlu, S.S. Erdeve, H.R. Ilgin, A. Tükün, G. Öcal. Clinical Characteristics of Our Cases with Mutation in the Androgen Receptor Gene. XVI. was held in Samsun on 6-10 November 2012. First Prize in Oral Presentation at the National Pediatric Endocrine and Diabetes Congress.