Ahmet Hakan Birkent

• Elazığ Anatolian High School 1983-1990
• GATA Military Medical Academy, 1990-1996
• GATA Department of Otorhinolaryngology (Lect.), 1999-2002
• GATA Department of Otorhinolaryngology (Asst. Prof.), 2005-2010
• Dept. OTO-HNS, University of Washington, Seattle/USA, 2007-2008
• GATA Department of Otorhinolaryngology (Lect.), 2010-2017
• Nişantaşi University (Prof.), 2019-2021
• Fenerbahçe University  (Prof.), 2021-
  

• Ankara Gendarmerie Hospital, 2002-2005
• GATA Department of Otorhinolaryngology, 2005-2017
• Centrium ENT Hospital
• İstanbul Surgery Hospital
• Medicana Çamlıca Hospital

Articles published in international refereed journals:

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• Akcam T, Kocaoglu M, Gerek M, Birkent H, Ozkaptan Y, Tayfun C. “Tolosa-Hunt syndrome with heterotopic salivary gland tissue and absence of internal carotid artery.” Auris Nasus Larynx, 30, 325-329 (2003).
• Akcam T, Oysul K, Birkent H, Gerek M, Yetiser S. “Leiomyosarcoma of the head and neck: report of two cases and review of the literature.” Auris Nasus Larynx, 32, 209-212 (2005).
• Karahatay S, Birkent H, Demir D, Ceyhan A, Satar B. “The effects of ventilated and non-ventilated nasal packs on Eustachian tube function: nine-step inflation-deflation test results.” Rhinology, 44, 197-200 (2006).  
• Satar B, Sen D, Karahatay S, Birkent H, Yetiser S.”Effect of cochlear reserve on postoperative outcome in otosclerosis.” Eur Arch Otorhinolaryngol, 264, 489-493 (2007). 
• Birkent H, Tosun F, Karahatay S, Akcam T. “Progressive maxillary sinus hypoplasia with open ostium.” J Craniofac Surg, 18, 706-708 (2007). 
• Durmaz A, Tosun F, Kurt B, Gerek M, Birkent H. “Osteolipoma of the nasopharynx.” J Craniofac Surg, 18, 1176-1179 (2007).
• Karahatay S, Yilmaz YF, Gunhan O, Birkent H, Yetiser S. “Spindle cell carcinoma of the larynx with a verrucous carcinoma component: combined carcinoma of larynx.” Auris Nasus Larynx, 34, 557-559 (2007). 
• Yetiser S, Erol U, Birkent H, Durmaz A. “Internal auditory canal enlargement (Giant IAC) and defective fundus in a child with congenital neurosensorial hearing loss.” Int J Pediatr Otorhinolaryngol Extra, 2, 95-98 (2007). 
• Yetiser S, Hidir Y, Birkent H, Satar B, Durmaz A. “Traumatic ossicular dislocations: etiology and management.” Am J Otolaryngol, 29, 31-36 (2008).
• Satar B, Karahatay S, Sen D, Cekin E, Birkent H. “Analytic view to concordance between electrocochleography and caloric test in Meniere's disease.” Eur Arch Otorhinolaryngol, 265, 159-165 (2008).
• Birkent H, Soken H, Akcam T, Karahatay S, Gerek M. “The effect of radiofrequency volumetric tissue reduction of soft palate on voice.” Eur Arch Otorhinolaryngol, 265, 195-198 (2008).
• Birkent H, Karahatay S, Akcam T, Durmaz A, Ongoru O. “Primary parotid tuberculosis mimicking parotid neoplasm: a case report.”  J Med Case Reports, 2, 62 (2008).
• Karahatay S, Yilmaz YF, Birkent H, Ay H, Satar B. “Middle ear barotrauma with hyperbaric oxygen therapy: incidence and the predictive value of the nine-step inflation/deflation test and otoscopy.” Ear Nose Throat J, 87, 684-688 (2008). 
• Birkent H, Karacalioglu O, Merati AL, Akcam T, Gerek M. “Prospective study of the impact of thyroid hormone replacement on objective voice parameters.” Ann Otol Rhinol Laryngol, 117, 523-527 (2008).
• Birkent H, Durmaz A, Hidir Y, Erdem U, Tosun F. “Sneezing-related orbital emphysema and pneumocephalus treated with transnasal endoscopic surgery.” J Otolaryngol Head Neck Surg, 37, E167-169 (2008).
• Birkent H, Maronian N, Waugh P, Merati AL, Perkel D, Hillel AD. “Dosage changes in patients with long-term botulinum toxin use for laryngeal dystonia.” Otolaryngol Head Neck Surg, 140, 43-47 (2009). 
• Birkent H, Erol U, Ciyiltepe M, Eadie TL, Durmaz A, Tosun F. “Relationship between nasal cavity volume changes and nasalance.” J Laryngol Otol, 123, 407-411 (2009).
• Durmaz A, Karahatay S, Satar B, Birkent H, Hidir Y. “Efficiency of Stenger Test in confirming profound unilateral pseudohypacusis.” J Laryngol Otol,123, 840-4 (2009).
• Dalgic A, Hidir Y, Birkent AH, Durmaz A, Gerek M. Life-threatening upper airway obstruction due to isolated hypermobile tongue. J Craniofac Surg. 2011 Jul;22(4):1529-31. 
• Birkent H, Durmaz A, Karakoc O, Ilica T, Gerek M. An unusual case of anterior and posterior laryngeal cleft together: combined cleft of larynx. Eur Arch Otorhinolaryngol. 2012 Jan;269(1):345-8. 
• Gerek M, Durmaz A, Aydin U, Birkent H, Hidir Y, Tosun F. Relationship between nasal valve changes and nasalance of the voice. Otolaryngol Head Neck Surg. 2012 Jul;147(1):98-101. 
• Karakoc O, Akcam T, Birkent H, Arslan HH, Gerek M. Nasalance scores for normal-speaking Turkish population. J Craniofac Surg. 2013 Mar;24(2):520-2. 
• Birkent H, Sardesai M, Hu A, Merati AL. Prospective study of voice outcomes and patient tolerance of in-office percutaneous injection laryngoplasty. Laryngoscope. 2013 Jul;123(7):1759-62. 
• Dalgic A, Karakoc O, Karahatay S, Hidir Y, Gamsizkan M, Birkent H, Gerek M. Submandibular triangle masses. J Craniofac Surg. 2013;24(5):e529-31.
• Asik MB, Karasimav O, Birkent H, Merati AL, Gerek M, Yildiz Y. Airway and Respiration Parameters Improve Following Vocal Fold Medialization: A Prospective Study. Ann Otol Rhinol Laryngol. 2015 Dec;124(12):972-7. 
• Karakoc O, Akcam MT, Genc H, Birkent H, Binar M, Gerek M. Do Pharyngeal Surgeries for Snoring and Obstructive Sleep Apnea Have an Impact on Nasalance Scores? J Craniofac Surg. 2015 Oct;26(7):2213-6. 
• Sardesai MG, Merati AL, Hu A, Birkent H. Impact of patient-related factors on the outcomes of office-based injection laryngoplasty. Laryngoscope. 2016 Aug;126(8):1806-9. 
• Asik MB, Karasimav O, Birkent H, Merati AL, Gerek M, Yildiz Y. Impact of unilateral carbon dioxide laser posterior transverse cordotomy on vocal and aerodynamic parameters in bilateral vocal fold paralysis. J Laryngol Otol. 2016 Apr;130(4):373-9. 
• Polat B, Karahatay S, Birkent H, Gerek M. The Practicability of Transnasal Esophagoscopy and the Evaluation of Patient's Perception: A Prospective Study. Clin Exp Otorhinolaryngol. 2016 Dec;9(4):366-369.
• Vasconcelos S, Birkent H, Sardesai MG, Merati AL, Hillel AD. Influence of age and gender on dose and effectiveness of botulinum toxin for laryngeal dystonia. Laryngoscope. 2009 Oct;119(10):2004-7. 
• Erdur Ö, Taşli H, Polat B, Sofiyev F, Tosun F, Çolpan B, Birkent H, Öztürk K. Surgical Management of Dysphagia Due to Anterior Cervical Osteophytes. J Craniofac Surg. 2017;28(1): e80-e84.
• Arslan F, Polat B, Durmaz A, Birkent H. Effects of Nasal Obstruction due to Nasal Polyposis on Nasal Resonance and Voice Perception. Folia Phoniatr Logop. 016;68(3):141-143. 
• Taşlı H, Birkent H, Gerek M. Three Cases of Relapsing Polycondritis with Isolated Laryngotracheal Stenosis. Turk Arch Otorhinolaryngol. 2017 Jun;55(2):77-82.
• Tasli H, Karakoc O, Birkent H. A Grading System for Transnasal Flexible Laryngoscopy. J Voice. 2018 May 2. pii: S0892-1997(17)30617-3.
• Tasli H, Eser B, Asik MB, Birkent H. Does Pepsin Play a Role in Etiology of Laryngeal Nodules? J Voice. 2018 May 11. pii: S0892-1997(18)30041-9.
• Tasli H, Birkent H, Karakoc O, Gokgoz MC .Optimal Position for Transnasal Flexible Laryngoscopy. J Voice. 2018 Dec 20. pii: S0892-1997(18)30420-X.
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Articles published in national refereed journals:

• F Tosun, M Gerek, H Birkent, Y Özkaptan. "Pharyngocutaneous fistula after total laryngectomy; analysis of different risk factors." Türkiye Klinikleri KBB Dergisi, 2, 133-139 (2002). 
• T Akcam, H Birkent, M Gerek, Y Özkaptan. "Giant cervical lipoma." Türkiye Klinikleri KBB Dergisi, 3, 48-52 (2003).
• T Akçam, E Bolu, C Durmuş, H Birkent, Y Özkaptan. "Voice fundamental frequency evaluation in male patients with isolated hypogonadotropic hypogonadism." Turkey Clinics ENT Journal, 4, 65-68 (2004).
• H Birkent, T Akçam, M Gerek, İ Ertaş, Y Özkaptan. "Our results of voice therapy in functional voice disorders." Journal of Otorhinolaryngology Specialization, 12, 120-127 (2004). 
• AH Birkent, S Karahatay, T Akçam, M Gerek, S Yetişer. "Solitary cystic lymph node metastasis of thyroid papillary cancer." ENT-Forum Electronic Journal of Otolaryngology and Head and Neck Surgery, 4, 157-161 (2005).
• T Akçam, Ö Karakoç, S Karahatay, H Birkent, M Gerek. "Investigation of position-related airway changes in patients with snoring by acoustic pharyngometry." ENT- Forum Electronic Journal of Otolaryngology and Head and Neck Surgery, 4, 84-87 (2005).
• H Birkent, T Akçam, M Gerek, İ Ertaş, Y Özkaptan. "Our results of voice therapy in functional voice disorders." Journal of Otorhinolaryngology Specialization, 12, 120-127 (2004). 
• AH Birkent, S Karahatay, T Akçam, M Gerek, S Yetişer. "Solitary cystic lymph node metastasis of thyroid papillary cancer." ENT-Forum Electronic Journal of Otolaryngology and Head and Neck Surgery, 4, 157-161 (2005).
• T Akçam, Ö Karakoç, S Karahatay, H Birkent, M Gerek. "Investigation of position-related airway changes in patients with snoring by acoustic pharyngometry." ENT- Forum Electronic Journal of Otolaryngology and Head and Neck Surgery, 4, 84-87 (2005).
• H Birkent, T Akçam. "Tonsillectomy and adenoidectomy: traditional and new techniques." Turkey Clinics of Surgical Medical Sciences Otorhinolaryngology, 1, 16-25 (2005).
• H Birkent, H Söken. "Halitosis." Turkey Clinics of Surgical Medical Sciences Otolaryngology, 1, 30-37 (2005).
• H Birkent. "History and definitions of snoring and sleep apnea." Current Approach in Otolaryngology Head and Neck Surgery, 2, 11-13 (2006).
• H Karadeniz, AH Birkent, S Karahatay, A Durmaz, T Akçam, M Gerek. "Efficacy of radiofrequency tissue ablation in the treatment of inferior turbinate hypertrophy."  Journal of Otolaryngology Head and Neck Surgery ,15, 18-26 (2007).
• E Gönül, S Yetişer, S Şirin, A Coşar, M Taşar, H Birkent. "Intraventricular traumatic pneumocephalus: case report." Journal of Otorhinolaryngology Specialization, 17, 231-234 (2007). 
• Ö Karakoç, T Akçam, M Gerek, H Birkent. "Reliability of Epworth sleepiness scale in patients with snoring and obstructive sleep apnea." ENT-Forum Electronic Journal of Otolaryngology and Head and Neck Surgery, 6, 86-89 (2007). 
• Ö Karakoç, T Akçam, M Gerek, H Birkent. "Obstructive sleep apnea and chronic diseases." ENT-Forum Electronic Journal of Otolaryngology and Head and Neck Surgery, 7, 15-20 (2008).      
• S Karahatay, A Sütbaş, H Tuğcu, H Birkent, A Ceyhan, M Gerek. "Diagnostic times and legal aspects of laryngeal cancer." Türkiye Klinikleri Tıp Bilimleri Dergisi, 28, 275-279 (2008). 
• H Birkent, F Tosun. "Endonasal endoscopic approach in the treatment of cysts, congenital anomalies and rare benign tumors of the anterior skull base." Current Approach in Otolaryngology Head and Neck Surgery, 4, 27-33 (2008).
• H Birkent, S Karahatay, A Durmaz, B Kurt, F Tosun. "Choanal polyp originating from the nasal septum: Septochoanal polyp." Journal of Otorhinolaryngology Specialization, 19(3), 163-6 (2009).
• M Gerek, U Erol, Y Hidir, H Birkent. "Endolaryngeal Laser Excision of a Giant Hypopharynx Lipoma Causing Severe Respiratory Distress. "Türkiye Klinikleri Tıp Bilimleri Dergisi, (2012).

Publications:

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• Publications: 
  S Yetişer, H Birkent. "Vestibular Disorders" (Book chapter translation) Current Otorinolaryngology-Head and Neck Surgery Diagnosis and Treatment. Editor: AK Lalwani Translation Editor: C Cingi, Page:761-770 Güneş Kitapevi 2005 Ankara
  H Birkent, Sertaç Yetişer. "Neuroplasticity in otology" (Book chapter translation) Otolaryngology Head and Neck Surgery Editors: CW Cummings, B Haughey, JR Thomas, LA Harker, PW Flint, KT Robbins, DE Schuller, MA. Richardson Translation Editor: C Koç, Page: 2815-2832 Güneş Kitapevleri 2007 Ankara
  H Birkent, Sertaç Yetişer. "Approach to temporal bone trauma" (Book chapter translation) Otolaryngology Head and Neck Surgery Editors: CW. Cummings, B Haughey, JR Thomas, LA. Harker, PW. Flint, KT Robbins, DE. Schuller, MA. Richardson Translation Editor: C Koç, Page: 2848-2867 Güneş Kitapevleri 2007 Ankara
  H Birkent, T Akçam, S Yetişer. "Otitis media with effusion". Ear Nose Throat Infections. Editor: C Cingi, Page: 122-140 Senk Matbaacılık 2008 Istanbul
  H.Birkent, Y.Hidir. Evidence-Based Indications and Outcomes of Pediatric Tonsillectomy. Evidence Based Diagnosis and Treatment in Otorhinolaryngology. Editor: C.Cingi, Page: 343-51 Sebad Publications 2011 Eskişehir.
• S Yetişer, H Birkent. "Vestibular Disorders" (Book chapter translation) Current Otorinolaryngology-Head and Neck Surgery Diagnosis and Treatment. Editor: AK Lalwani Translation Editor: C Cingi, Page:761-770 Güneş Kitapevi 2005 Ankara
• H Birkent, Sertaç Yetişer. "Neuroplasticity in otology" (Book chapter translation) Otolaryngology Head and Neck Surgery Editors: CW Cummings, B Haughey, JR Thomas, LA Harker, PW Flint, KT Robbins, DE Schuller, MA. Richardson Translation Editor: C Koç, Page: 2815-2832 Güneş Kitapevleri 2007 Ankara
• H Birkent, Sertaç Yetişer. "Approach to temporal bone trauma" (Book chapter translation) Otolaryngology Head and Neck Surgery Editors: CW. Cummings, B Haughey, JR Thomas, LA. Harker, PW. Flint, KT Robbins, DE. Schuller, MA. Richardson Translation Editor: C Koç, Page: 2848-2867 Güneş Kitapevleri 2007 Ankara
• H Birkent, T Akçam, S Yetişer. "Otitis media with effusion". Ear Nose Throat Infections. Editor: C Cingi, Page: 122-140 Senk Matbaacılık 2008 Istanbul
• H.Birkent, Y.Hidir. Evidence-Based Indications and Outcomes of Pediatric Tonsillectomy. Evidence Based Diagnosis and Treatment in Otorhinolaryngology. Editor: C.Cingi, Page: 343-51 Sebad Publications 2011 Eskişehir.
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• Turkish Otorhinolaryngology Head and Neck Surgery Association, 
• Turkish Ear Nose Throat Head and Neck Surgery Foundation, 
• Ankara Ear Nose Throat Head and Neck Surgery Association 
• Turkish Laryngological Society 
• Professional Audio Association 
• Voice, Speech, And Swallowing Disorders Association 
• Union of the Europian Phoniatricians, 
• European Laryngological Society

• Poster Presentation First Place Award, Triologic Society, USA,2014. 
• Poster Presentation Third Place Award, Fall Voice Conference, USA,2014.