Medical School

Istanbul Faculty of Medicine (Çapa), 2007

Post-Graduate Training

Haseki Training and Research Hospital, 2009-2014

Marmara Training and Research Hospital, 2012-2013

Professional Experience

Istanbul Faculty of Medicine (Çapa), 2001-2007

Sivas Şarkışla Akçakışla Primary Health Center, 2008-2009

Haseki Training and Research Hospital, 2009-2014

Marmara Training and Research Hospital, 2012-2013

Batman Regional State Hospital, 2014-2016

Private Kurtköy Ersoy Hospital, 2016-2018

Istanbul Okan University Hospital, 2018-2021

Medical Interests

Non-Surgical Pain Management (Spinal)

Herniated Discs

Neck Herniated Discs

Lower Back Pain

Neck Pain

Spondylolisthesis

Spinal Stenosis

Spinal Injections

Spinal Traumas

Spinal Fractures

Spinal Tumors

Spinal Cord Tumor

Scoliosis (Adult and Pediatric)

Kyphosis (Humpback)

Brain Tumors

Hydrocephalus

Brain Aneurysms

Brain Hemorrhages

Special Experience

Microsurgery for Herniated Discs (Back and Neck)

Endoscopic Discectomy

Scoliosis Surgery

Pain Management

Scientific Publications

1. Articles published in international refereed journals (SCI,SSCI,Arts and Humanities)

Ogrencı A. Koban O, Yaman O, Yilmaz M, Dalbayrak S. Traumatic sequestrated thoracic disc herniation; a case report Turk Neurosurg, 1 [Epub ahead of print].

Ogrencı A, Koban O, Yaman O, Yılmaz M, Dalbayrak S. (2017). Clinical Comparison Between Patients Operated for Unilateral Radiculopathy via a Contralateral (Facet-Sparing) and Ipsilateral Side Approach.Turk Neurosurg, 1.

Koban O, Ogrencı A, Yaman O, Dalbayrak S.Phantom Radicular Pain Treated with Lumbar Microdiscectomy: A Case Report.Turk Neurosurg. 2017 Feb 15. doi: 10.5137/1019-5149.JTN.19768-16.1. [Epub ahead of print].

Batcik, OE, Öğrenci A, Koban O, Ekşi, MS, Bilge, T. (2016). Cerebral Alveolar Echinococcosis Concomitant with Liver and Lung Lesions in a Young Adult Patient: Case Report and Literature Review.Turkiye Parazitol Derg,40, 169-71

Ogrencı A, Ekşi MŞ, Koban O, Karakuş M.Spontaneous rapid resolution of acute subdural hematoma in children. Childs Nerv Syst. 2015 Dec;31(12):2239-43.

Ogrencı A, Ekşi MŞ, Özcan-Ekşi EE, Koban O.From idea to publication: Publication rates of theses in neurosurgery from Turkey. Neurol Neurochir Pol. 2016;50(1):45-7.

Ogrencı A, Ekşi MŞ, Gün B, Koban O. Traumatic basal ganglia hematoma following closed head injuries in children.Childs Nerv.Syst 2016

Koban O, Çal H, Ekşi MŞ, Özcan-Ekşi EE, Öğrenci A. Migrating bullet in the thecal sac at the level of the conus medullaris without neurological deficit. J Clin Neurosci. 2016 Feb 23. pii: S0967-5868(16)00043-6

Ogrencı A, Batçık OE, Ekşi MŞ, Koban O. Pandora's box: eosinophilic granuloma at the cerebellopontine angle-should we open it? Childs Nerv Syst. 2015 Dec 12.

Ogrencı A, Ekşi MŞ, Koban O. (2016). Spontaneous third ventriculostomy 8 years after diagnosis of obstructive hydrocephalus. Child's Nervous System, 32(9), 1727-1730.

Ogrenci A, Koban O, Yaman O, Yilmaz M, Dalbayrak S. (2019). Polyetheretherketone Rods in Lumbar Spine Degenerative Disease: Mid-term Results in a Patient Series Involving Radiological and Clinical Assessment. Turkish Neurosurgery, 29(3):392-399,

Koban O, Ogrenci A, Yilmaz M, Dalbayrak S. (2020)Vertebroplasty with Decompression for Epidural Extending Vertebral Hemangiomas: An Alternative Technique. Turkish Neurosurgery DOI: 10.5137/1019-5149.JTN.28191-19.2

Akar E, Ogrenci A, Koban O, Yaman O, Yilmaz M, Dalbayrak S. (2019) Acute spinal epidural hematoma: A case report and review of the literature. Ulus Trauma Emergency Surgery Derg. 2020; 26(4): 628-631

Dalbayrak S, Ogrenci A, Akar E, Koban O, Yilmaz A, Yilmaz M.(2020) Clinical and radiological outcomes after correction of degenerative lumbar scoliosis with dynamic stabilization (with the help of a rigid rod); and describing an alternative technique September 2020 Journal of Clinical Neuroscience 79:123-128

Ogrenci A, Akar E, Koban O, Isik S, Sener M, Yilmaz M, Dalbayrak S. (2020) Spinal Anesthesia in Surgical Treatment of Lumbar Spine Tumors. June 2020 Clinical Neurology and Neurosurgery 196:106023 DOI: 10.1016/j.clineuro.2020.106023

Akar E, Koban O, Ogrenci A, Yilmaz M, Dalbayrak S. (2020) Polymethylmetacrylate Cement Augmentation of the Coccyx (Coccygeoplasty) for Fracture: A Case Report Balkan Med J 2020;37:348-50

Koban O, Akar E, Ogrenci A, Yilmaz M, Dalbayrak S Any Instrument in a Surgeon's Hand can be Fatal: Unusual Iliac Artery Injury in Lumbar Spinal Deformity Surgery. World Neurosurg 2020 Nov;143:276-279

2. Articles published in other international refereed journals

Ekşi MŞ, Öğrenci A, Batçık OE, Koban O Management of obstructive hydrocephalus in pregnant patient. Asian Journal of Neurosurgery 2015.

Ogrencı A, Koban O, Ekşi M, Yaman O, Dalbayrak S. (2017). The Necessity of Follow-Up Brain Computed-Tomography Scans: Is It the Pathology Itself Or Our Fear that We Should Overcome?.Open access Macedonian journal of medical sciences, 5(6), 740.

Ogrencı A, Koban O, Yaman O, Dalbayrak S, Yılmaz M. (2018). The Effect of Technological Devices on Cervical Lordosis.Open access Macedonian journal of medical sciences,6(3), 467.

Şentürk S, Ogrencı A, Gürçay AG, Abdioğlu AA, Yaman O, Özer AF. (2018). Classification of Radiological Changes in Burst Fractures.Open access Macedonian journal of medical sciences,6(2), 359.

Ogrencı A, Koban O, Ekşi M, Yaman O, Dalbayrak, S. (2017). Traumatic Transient Herniation Concomitant with Tonsillar Hemorrhagic Contusion in a Child.Open access Macedonian journal of medical sciences,5(6), 771

Ogrencı A, Koban O, Şentürk S, Yaman O, Sasani M, Dalbayrak S, Ozer AF. Giant Spinal Schwannomas. Clin Surg. 2017; 2, 1593

3. Papers presented at international scientific meetings and published in proceedings book

Ogrencı A, O Koban, OE. Batçık: Multiple Cranial Masses;metastasis? Echinococcus Multilocularis , WFNS Oral Presentation Abstract No. FA2626, 2013

Ogrencı A, O Koban, OE. Batçık: The Only Complaint, Impotence; Recurrent Neuroenteric Cyst, WFNS Abstract No. FA2626, 2013

Koban O, Öğrenci A, Yaman O, Dalbayrak S, Yılmaz M. Clinical and Radiological Results of Dynamic Instrumentation in Lumbar Degenerative Scoliosis and Degenerative Listhesis Surgery, WFNS Istanbul

Ogrencı A. Dynamic Stabilization with Polyetheretherketone (PEEK) Rods: Mid-term Results (5 Years) in Lumbar Spine Degenerative Diseases in A Comprehensive Patients Series-Radiological and Clinical Assessment,Nish Sırbiitan

4. Authored international books or chapters in books

Ogrenci A, O.Yaman.'' Spinopelvic Instrumentation Techniques'' Spinal Instrumentation Techniques, Ed. A.Arslantaş.Vol. 1.Turkey Clinics Special Issue.(In Press),Ankara,2017

Ogrencı A, Yaman O.''Spine and Spinal Cord Growth'', Spine and Spinal Cord Surgery Handbook, Ed. A.Dalgıç, Ankara, 2017

Ogrencı A, Yaman O.''Evaluation of Natural Course and Progress'' Adolescent Idiopathic Scoliosis, Ed. Ö.Akçalı, C.Koşay, M.Aydoğan, D.Konya, E.Ofluoğlu .Vol 1.Ankara,2017

Ogrencı A, Dalbayrak S. (2018). Cervical Spondylotic Myelopathy: Anterior Decompression and Fusion. Turkiye Klinikleri Neurosurgery-Special Topics, 8(2), 70-73

Ogrencı A:Posterior Approaches in Cervical Spondylopathic Myelopathy;Laminoplasty Techniques.Degenerative Diseases of the Cervical and Thoracic Spine.Editors: Kadir Kotil, Cüneyt Temiz, Erkan Kaptanoğlu, Tahsin Erman, Özkan Ateş, Ali Dalgıç, İlker Solmaz ,Ankara ,2017

Ogrencı A, Yılmaz M. Posterolateral Approaches in Thoracic Disc Hernias; Definition/Technique/Patient Selection.Editors: Kadir Kotil, Cüneyt Temiz, Erkan Kaptanoğlu, Tahsin Erman, Özkan Ateş, Ali Dalgıç, İlker Solmaz ,Ankara ,2017

Ogrencı A, Yilmaz M. Nerve Tissue Damage_ Gorülme Frequencies - Factors - How to Prevent - How to Treat. Complications and Revision Approaches in Spinal Surgery. Turkish Neurosurgical Association Publications 2017.Ankara

Ogrencı A. Pregnancy and Low Back Problems. Gynecologic and Obstetric Emergencies. (ed) Ö.Sakin, A.Anğın, M.Çıkman. 2019,Istanbul

Ogrencı A, Yilmaz M Koksidinya Spinal Bulletin 88.2019 E ISSN 2148-0842

Ogrencı A, Dalbayrak S. Spinal Symposium Aging Spine Book,2019. What Should be the Surgical Limits in Elderly Lumbar Degenerative Scoliosis? Indicators, Tricks and Handicaps. Chapter 77

Ogrencı A, Yaman O. Deformity and Disc Herniation. Turkey Clinics Special Issue.

5. Articles published in national refereed journals

Ogrencı A, Koban O. Yaman O. Yılmaz M, Dalbayrak S. Hammering Nail to The Head for Suicide; A Case Report And Literature Review ; Hammering Nail to The Head for Suicide; Case Report And Literature Review Haseki Tıp Bulteni DOI: 10.4274/haseki.4351 Med Bull Haseki 2018

Ogrencı A. Bone Protrusion That We Should be Aware of: Foraminal Osteophytes; Classification and Surgical Results , Haseki Tıp Bulteni, 2018;56:299-306

Ogrencı A. ,Effects of the Location of Dural Tear and Repair in the Development of Pneumocephalus after Spinal Surgery. Haseki Tıp Bulteni 2019;57:162-165

Ogrencı A, Koban O, Yaman O, Dalbayrak S. (2018). Isolated Unilateral Temporalis Muscle Hypertrophy: A Case Report and Review of the Literature. DOI: 10.4274/haseki.47965 Med Bull Haseki

Ayşegül Özdemir Ovalıoğlu, İlhan Yılmaz, Ahmet Öğrenci, Ersegun Batçık, Turgay Bilge.Intracranial lipomas;Two Cases Report Şişli Etfal Tıp Dergisi 2012 46(4);217-220

Ogrenci A , Koban O . Anterior Misplacement of Lumbar Transforaminal Interbody Fusion (TLIF) Cages in Lumbar Degenerative Disc Disease; Retrospective Analysis Anterior Misplacement of Lumbar Transforaminal Interbody Fusion (TLIF) Cages in Lumbar Degenerative Disc Disease: A retrospective Analysis. Bozok Medical Journal. 2019; 9(2): 5-1

Koban O, Ogrencı A, Yılmaz M, Dalbayrak S (2020). A Less Invasive Approach In Isthmic Spondylolisthesis: Spino-semilamina-facet Sparing Technique August 2020 Journal of Turkish Spinal Surgery 31(3):160-166

Ogrenci A, Akar E, Koban O, Yaman O, Yilmaz M, Dalbayrak S. Dynamıc Instrumentation Of The Thoracic Spine. J Turk Spinal Surg 2020;31(4):251-53.

6. Papers presented at national scientific meetings and published in the proceedings book

Ogrenci A. Coronal Balance Disorders.33rd Scientific Congress, Speech, Antalya

Ogrenci A. Infection in Spinal Instrumentation. Speech, 2019 Spinal Symposium, Antalya

Ogrenci A. Vertebral Gap Vertebroplasty 2019 Spinal Symposium, Oral Presentation, Antalya

Ogrencı A, Koban O, Yaman O, Yılmaz M, Dalbayrak S: The effect of technological devices on cervical lordosis: Tü

Ogrencı A, Koban O, Yaman O, Yilmaz M, Dalbayrak S, Koban O, Yilmaz M, Dalbayrak S: Redundant Nerve Root Syndrome; Report of Three Cases: Turkish Neurosurgical Association 30th Scientific Congress, Electronic Poster Presentation 365, 2016

Ogrencı A, Koban O, Yaman O, Yılmaz M, Dalbayrak S, Koban O, Yılmaz M, Dalbayrak S: Lumbar Disc Herniation and Lokman Hekimlik in Rural Turkey: Turkish Neurosurgical Society 30th Scientific Congress, Electronic Poster Presentation 555, 2016

Koban O, Ogrencı A,Yılmaz M, Dalbayrak S: Traumatic Isolated 4th Ventricle Hematoma in a Pediatric Patient: Turkish Neurosurgical Association 30th Scientific Congress, Electronic Poster Presentation 178,2016

Ogrencı A, Koban O :Investigation of the Effects of Comparative and Concomitant Use of Doxycycline from 2nd Generation Tetracyclines with Methylprednisolone on Malonidialdehyde, Superoxide Dismutase and Catalase in Rats with Acute Spinal Cord Injury: Turkish Neurosurgical Association 29th Scientific Congress, Oral Presentation -174,2015

Ogrencı A, Koban O, Karabulut C: Comparison of Fusion Rates in Stabilization Cases with and without Interbody Graft: : Turkish Neurosurgical Association 29th Scientific Congress, Oral Presentation -122,2015

Ogrencı A, Koban O, Batçık OE, Özdemir B: Our Percutaneous Lumbar Discectomy Results and VAS Evaluation: Turkish Neurosurgical Association 29th Scientific Congress, Electronic Poster Presentation -792,2015

Ogrencı A, Koban O: Analysis of hematoma sizes in patients with epidural hematoma: Turkish Neurosurgical Association 29th Scientific Congress, Electronic Poster Presentation -762,2015

Koban O, Ogrencı A:Radiologic-Clinical Follow-up of L5-S1 Caudale Migrated Soft Disc Hernias and Our Results: Turkish Neurosurgical Association 29th Scientific Congress, Electronic Poster Presentation -627,2015

Ogrencı A, Koban O, Kılınç BM:Lobar Hematoma Due to Angiography Negative Choroid Plexus Hemorrhage in a Pediatric Patient: Case Report:Turkish Neurosurgical Association 29th Scientific Congress, Electronic Poster Presentation -516,2015

Ogrencı A, Koban O;A Rare Case in Scalp Lesions;Cellular Neurotecoma;Case Report; Turkish Neurosurgical Association 29th Scientific Congress, Electronic Poster Presentation -233,2015

Ogrencı A, Koban O, Batçık OE, Özdemir B:Axis Vertical Body Fracture; A Rarely Seen Case; Case Report; Turkish Neurosurgical Association 29th Scientific Congress, Electronic Poster Presentation -206,2015

Ogrencı A, Koban O;Giant Tarlov Cyst;A Case Report:Case Report; Turkish Neurosurgical Society 29th Scientific Congress, Electronic Poster Presentation -357,2015

Ogrencı A, Koban O, Çal H, Karabulut C:A Rare Case;Traumatic Tonsillar Contusion:Case Report, Turkish Neurosurgical Association 29th Scientific Congress, Electronic Poster Presentation -197,2015

Ogrencı A, Koban O, Çal H:A Rare Traumatic Lesion in Pediatric Age Group;Putaminal Hemorrhage: 2 Cases: Case Report, Turkish Neurosurgical Association 29th Scientific Congress, Electronic Poster Presentation -196,2015

Ogrencı A, Karakuş M, Koban O, Acute Subdural Hematoma with Rapid Resolution in Pediatric Age Group; Case Report, Turkish Neurosurgical Association 29th Scientific Congress, Electronic Poster Presentation -195,2015

Ogrencı A, OE. Batçık, F. Kırar, O Koban,B.Özdemir,AO.Akdemir: Vertebral Metastasis of Epidermoid Cancer Developing on the Basis of Burn in the Extremity: Case Report, 28th Scientific Congress of Turkish Neurosurgical Society, Electronic Poster Presentation -199,2014

Ogrencı A, Acar C; Fusion Insufficient, Good Fusion Required; Case Report, 28th Scientific Congress of Turkish Neurosurgical Association, Electronic Poster Presentation -186,2014

Ogrencı A, Karabulut C;Paraspinal Intramuscular Localized Synovial Cyst of Facet Joint;Case Report. Turkish Neurosurgical Association 28th Scientific Congress, Electronic Poster Presentation,2014

Ogrencı A, Batçık OE, Koban O, Akdemir AO: A New Differential Diagnosis in Corner Tumors;Eosinophilic Granuloma, Turkish Neurosurgical Association 28th Scientific Congress, Electronic Poster Presentation -2014

Ogrencı A, Akçetin MA;Prostate CA Presenting with Isolated Cranium Metastasis; Case Report. Turkish Neurosurgical Association 28th Scientific Congress, Electronic Poster Presentation -379,2014

Ogrencı A, Koban O, Batçık OE, Özdemir B, Karabulut C, Akdemir AO: The Place of Neurosurgery Specialization Theses in the Literature in Turkey, 28th Scientific Congress of Turkish Neurosurgical Society, Oral Presentation,2014

K.Baturay F.Kırar,A.Öğrenci,N.Topyalın,OE.Batçık,C.Karabulut,MA.Akçetin;Occipital Dermal Sinus Detected in Adult Age;Case Report. Turkish Neurosurgical Association 28th Scientific Congress,Electronic Poster Presentation,2014

Ogrencı A, Baturay K, OE.Batçık;Rebleeding in a Chronic Subdural Hematoma Presenting as a Mass; Case Report. Turkish Neurosurgical Society 28th Scientific Congress,Electronic Poster Presentation-621,2014

Koban O, Ogrencı A, Batçık OE, Baturay K: Diagnostic Difficulty of Spontaneous Third Ventriculostomy After Chronic Hydrocephalus: Case Report, Turkish Neurosurgical Society 27th Scientific Congress, Electronic Poster Presentation -589,2013

Koban O, Ogrencı A, Batçık OE: First Trimester Maternal Hydrocephalus: Case Report, Turkish Neurosurgical Society 27th Scientific Congress, Electronic Poster Presentation-621,2013

Koban O, Ogrencı A, OE Batçık, K. Baturay,MA Akçetin: Symptomatic Arachnoid Cyst in the Appearance of Cystic Conus Medullaris Tumor: A Case

7. Other publications

Ogrencı A, Yılmaz M. Posterolateral Methods in the Surgical Treatment of Thoracic Disc Herniations .Turk Nöroşirurji Dergisi, Supplementary issue,2018

Ogrenci, A. Yaman, O. (2017). Surgeon Handedness in Transpedicular Instrumentation-A Short Review.J Spine,6(387), 2

Memberships

Turkish Medical Association Istanbul Medical Chamber

Turkish Neurosurgical Association

Turkish Spine Society

Turkish Neurosurgical Society Spinal and Peripheral Nerve Surgery Educ. Educ. Group

EANS (European Association of Neurosurgery)