Education

Biography

1. Consultant, Clinic of Neurosurgery, Haydarpasa Numune Teaching and Research Hospital, Turkey, Turkey, 1994-2001
2. Vice chief, Clinic of Neurosurgery, Dr. Lutfi Kirdar Kartal Teaching and Research Hospital, Turkey, Turkey, 2001-2003
3. Vice chief, Clinic of Neurosurgery, Haydarpasa Numune Teaching and Research Hospital, Turkey, Turkey, 2003- 2012
4. Private practice, 2012-Present
5. Instructor, Okan University, The Vocational School of Health Services, Tuzla, İstanbul,

Research Interest

Neurosurgery

Professional Activities:

1. Third prize winner of Best Turkish. XXII. Scientific Congress of Turkish Neurosurgical Society, April 2008.
2. Second prize winner of Scientific Research.  IV. Scientific Congress of Nervous System Surgery, November 2008.
3. Third prize winner of Best Turkish. XXIII. Scientific Congress of Turkish Neurosurgical Society, April 2009.
4. First prize winner of Best Oral Presentation. V. Scientific Congress of Nervous System October 2009.

Publications

1. Orakdöğen M, Uslu S, Tural SE, Somay H, Meriç ZC, Hakan T. The effect of ozone therapy on experimental vasospasm in the rat femoral artery. Turk Neurosurg (yayınlanmak üzere kabul edildi) DOI: 10.5137/1019-5149.JTN.14162-15.2
2. Hakan T, Aker F. Evaluation of 126 consecutive cases of stereotactic procedures: brain biopsy, diagnostic yield, accuracy, non-diagnostic results, hemorrhagic complications and follow up. Turk Neurosurg (yayınlanmak üzere kabul edildi) DOI: 10.5137/1019-5149.JTN.13742-14.0
3. Hakan T, Aker FV. Rosette-forming glioneuronal tumour of the fourth ventricle: case report and review of the literature. Folia Neuropathol. In press
4. Tayfun H, Metin O, Hakan S, Zafer B, Vardar AF. Brown tumor as an unusual but preventable cause of spinal cord compression: Case report and review of the literature. Asian J Neurosurg 2014;9:40-4.
5. Tural Emon S, Orakdogen M, Akpinar E, Hakan T, Zafer Berkman M. Arachnoid granulations: a rare cause of lytic occipital bone lesion. Neurol Neurochir Pol 2012;46(6):603-606.
6. Hakan T. Lumbar disk herniation presented with cauda equina syndrome in a pregnant. J Neurosci Rural Pract 3(2):197-199,2012.
7. Hakan T. Birincil ve Rekürren Metastatik Beyin Tümörlerinin Kanıta Dayalı Tedavisi. Journal of Neurological Sciences [Turkish] 29:(1)# 30; 171-178, 2012
8. Ersahin M, Karaaslan N, Gurbuz MS, Hakan T, Berkman MZ, Ekinci O, Denizli N, Aker FV. The safety and diagnostic value of frame-based and ct-guided stereotactic brain biopsy technique. Turk Neurosurg 21(4):582-90, 2011
9. Hakan T, Erşahin M, Somay H, Aker F. Pseudoaneurysm of the superficial temporal artery following revision of a middle cerebral artery aneurysm clipping: case report and review of the literature. Turk Neurosurg 21(3): 430-434, 2011.
10. Hakan T, Toklu HZ, Biber N, Celik H, Erzik C, Oğünç AV, Çetinel S, Sener G. Meloxicam exerts neuroprotection on spinal cord trauma in rats. Int J Neurosci 121(3):142–8, 2011.
11. Toklu HZ, Hakan T, Celik H, Biber N, Erzik C, Ogunc AV, Akakin D, Cikler E, Cetinel S, Ersahin M, Sener G. Neuroprotective effects of alpha-lipoic acid in experimental spinal cord injury in rats. J Spinal Cord Med 33(4):401–409, 2010.
12. Hakan T. Atlas: A Unique Vertebra that Takes Its Name from a Hemitheos in Greek Mythology, Atlas. WScJ 3: 212–214, 2010.
13. Erşahin M, Hakan T, Ayan E, Berkman Z, Ekinci O, Ceran N, Aker FV. Diagnostic and therapeutic role of CT-guided stereotactic surgery in the management of intracranial tuberculomas. Turk Neurosurg 20(3):295–302, 2010.
14. Hakan T, Toklu HZ, Biber N, Ozevren H, Solakoglu S, Demirturk P, Aker FV. Effect of COX–2 inhibitor meloxicam against traumatic brain injury-induced biochemical, histopathological changes and blood-brain barrier permeability. Neurol Res 32(6):629–635, 2010.
15. Karabaglı H, Karabaglı P, Hakan T. Rarely Encountered Spinal Tanycytic Ependymoma and Concominant Syringomyelia. J Neurol Sci [Turk] 27:(2)# 23;244–249, 2010.
16. Hakan T. Letter to the editor. Sphenoid wing meningioma and glioblastoma multiforme in collision – case report and review of the literature. Neurol Neurochir Pol 44 (1): 102, 2010.
17. Hakan T. Neurosurgery and a small section from the Greek myth: the God Pan and Syrinx. Childs Nerv Syst 25(12):1527–1529, 2009. 
18. Hakan T, Aydoseli A, Demir K, Aker FV. Clinical, pathological and radiological features of paraspinal textiloma: Report of two cases and review of the literature. Neurol Neurochir Pol 43(5): 475–478, 2009.
19. Toklu HZ, Hakan T, Biber N, Solakoglu S, Sener G. The protective effect of alpha lipoic acid against traumatic brain injury in rats. Free Radic Res 43(7): 658–67, 2009.
20. Biber N, Toklu HZ, Solakoglu S, Gultomruk M, Hakan T, Berkman Z, Dulger G. Cysteinyl-leukotriene receptor antagonist montelukast decreases blood-brain barrier permeability but does not prevent edema formation in traumatic brain injury. Brain Inj 43(7): 23(6): 577–584, 2009.
21. Hakan T, Turk C, Aker F. Tentorial Solitary Fibrous Tumour: Case Report and Review of the Literature. Neurol Neurochir Pol 43(1): 77–82, 2009.
22. Erdem I, Hakan T, Ceran N, Metin F, Akcay SS, Kucukercan M, Berkman MZ, Goktas P. Clinical features, laboratory data, management and the risk factors that affect the mortality in patients with postoperative meningitis. Neurol India 56(4): 433–437, 2008.
23. Hakan T, Turk CC, Celik H. Intra-operative real time intracranial subarachnoid haemorrhage during glial tumour resection: a case report. Cases Journal 1(1): 306, 2008.
24. Hakan T, Aker F. Case Report on a Patient with Neurofibromatosis type 1 and a Frontal Cystic Glioblastoma. Neurol Neurochir Pol 42(4): 362–365, 2008.
25. Hakan T, Çelikoğlu E, Aker F, Barışık N. Spinal Schwannomatosis: Case Report of A Rare Condition. Turk Neurosurg 18(3): 320–323, 2008.
26. Hakan T, Aker F. Chondromyxoid fibroma of frontal bone: a case report and review of the literature. Turk Neurosurg 18(3): 249–253, 2008. 
27. Hakan T, Çelikoğlu E, Aydoseli A, Demir K. The Redundant Nerve Root Syndrome of the Cauda Equina. Turk Neurosurg 18(2): 204–206, 2008.
28. Hakan T. Management of the Bacterial Brain Abscesses, Neurosurgical Focus, 24 (6):E4, 2008. (davetli yazı)
29. Hakan T. Letter to editor. Humanitarian medicine: what is the role of neurosurgery? Acta Neurochir (Wien) 150:199, 2008.
30. Hakan T, Berkman MZ, Ersoy T, Karataş İ, Şan T, Arbak S. Anti-inflammatory effect of meloxicam on experimental vasospasm in rat femoral artery. J Clin Neurosci 15: 55–59, 2008.
31. Hakan T,  Demir MK, Aker FV, Berkman MZ. Pregnancy-related spinal epidural capillary-cavernous hemangioma: Differential diagnosis with MR imaging. Australas Radiol 51:B6-B9, 2007.
32. Demir MK, Müslüman M, Kilicoglu G, Hakan T, Vardar F. Imaging Features of Intracranial Cystic Meningiomas. Can Assoc Radiol J 58: 109–115, 2007.
33. Demir MK, Hakan T, Kilicoglu G, Ceran N, Erdem İ, Berkman MZ, Göktaş P. Bacterial brain abscesses: prognostic value of an imaging severity index. Clin Radiol 62: 564–572, 2007. 
34. Celikoglu E, Hakan T, Bozbuga M. Cystic shwannoma of the falx cerebri. J Clin Neurosci, 14: 589–592, 2007.
35. Hakan T, Ceran N, Erdem İ, Berkman MZ, Göktaş P. Bacterial brain abscesses: an evaluation of 96 cases. J Infect 52 (5): 359–366, 2006.
36. Aker FV, Berkman MZ, Aydıngöz İ, Hakan T, Toksoy G. Pineal germinoma associated with multiple congenital melanocytic nevi: A Unique Case Presentation. Neuropathology 25: 336–3340, 2005.
37. Aker FV, Hakan T, Karadereler S, Erkan M. Accuracy and diagnostic yield of stereotactic biopsy in the diagnosis of brain masses: comparison of results of biopsy and resected surgical specimen. Neuropathology 25(3):207–13, 2005.
38. Demir K, Hakan T, Akıncı O, Berkman MZ. Primary cerebellar glioblastoma multiforme. Diagn Interv Radiol 11: 83–86, 2005.
39. Aker FV, Ozkara S, Eren P, Peker O, Armagan S, Hakan T. Cerebellar liponeurocytoma/lipidized medulloblastoma. Case report and review of the literature. J Neurooncol 71 (1):53–59, 2005.
40. Hakan T, Kizilkilic O, Adaletli I, Karabagli H, Kocer N, Islak C. Is there any seasonal influence in spontaneous bleeding of intracranial aneurysm and/or AVM in Istanbul? A hospital based study. Swiss Med Wkly 133:267-272, 2003.
41. Hakan T, Aker F V, Celik L, Tasali N. Intracranial multiple meningiomas with different radiological findings and histological types (Online). Eurorad - European Association of Radiology (URL: http://www.eurorad.org/case.php?id= 1294), (Nov 21, 2001).
42. Hakan T, Aker FV. A case report of fatal echinococcosis. (Online) Annals of Neurosurgery, 1(1): 14–19 (2001). http://annals-neurosurgery.org/papers/hakan_t/hakan_t.pdf
43. Karamehmetoğlu Ş, Ünal Ş, Karacan I, Yılmaz H, Togay HŞ, Ertekin M, Döşoğlu M, Ziyal MI, Kasaroğlu D, Hakan T. Traumatic spinal cord injuries in the most populated city of Turkey. An epidemiological study in İstanbul. Paraplegia, 33: 469–471, 1995.