MEDICAL SECOND OPINION

Medical School

Hacettepe University Faculty of Medicine, 2002


Post-Graduate Training

Ankara Numune Training and Research Hospital, Department of Internal Medicine, 2003-2008

Ankara Dışkapı Yıldırım Beyazıt Training and Research Hospital, Endocrinology and Metabolism Diseases (Subspecialty), 2009-2013

USA, University of Miami Miller School of Medicine, Diabetes Research Center, Endocrinology and Metabolism Diseases (Research Fellow with Scholarship), 2011-2012


Professional Experience:

Ankara Gölbasi Hasvak State Hospital, Internal Medicine (Compulsory Service), 2008-2009

Ankara Training and Research Hospital, Endocrinology (Compulsory Service, Specialization), 2013-2017

Ankara Yüksek İhtisas University Faculty of Medicine, Private Koru Hospital (Assistant Professor), 2017-2018

Istanbul Aydın University Faculty of Medicine (Assistant Professor), 2018-2021

VM Medical Park Florya Hospital, 2018-2019

Memorial (Şişli) Hospital (Associate Professor, ENT Specialist), 2019-2020

Medicana International Istanbul Hospital, Biruni University Faculty of Medicine (Professor, Assistant Professor), 2020-Present


Medical Fields of Interest:


Type 1 Diabetes, Type 2 Diabetes, Gestational Diabetes, Insulin Resistance, Insulin Pump

Thyroid Diseases, Thyroiditis, Hashimoto's Disease, Graves' Disease, Thyroid Nodule Ultrasonography and Biopsy

Obesity, Obesity Treatment, Obesity Surgery, Metabolism, Diet, Weight Loss

Reproductive Health, Menstrual Irregularities, Polycystic Ovary Syndrome, Hirsutism

Pituitary Gland Diseases, Prolactinoma, Cushing's Syndrome, Acromegaly

Adrenal Gland Diseases, Adenoma

Osteoporosis, Bone Loss, Bone Diseases

Parathyroid Gland Diseases


Special Experience:

Thyroid Ultrasonography

Fine Needle Aspiration Biopsy for Thyroid Nodules (Guided by Ultrasonography)

Insulin Pump and Continuous Glucose Monitoring Technologies





Scientific Publications

A. Articles published in international journals within the scope of SCI (Science Citation Index), SCI Expanded, SSCI (Social Science Citation Index):

1.Çolak Nujen(1), Dede Fatih, Canbakan Basol, Odabas Alı Rıza, Akyürek Nalan (2007) Acute tubulointerstitial nephritis associated with mantle cell lymphoma presented as acute renal failure. Nephrology, 12(1), 107-108, Doi: 10.1111/j.1440-1797.2006.00758.x.

2.Dede Fatih, Yıldız Ayla, Aylı Deniz, Colak Nujen(4), Odabas Ali Rıza, Akoglu Hadim, Eskioglu Erdal, Covic Adrian (2010). Modulation of the immune response to HBV vaccination by hemodialysis membranes. International Urology and Nephrology, 42(4), 1069-1075, Doi: 10.1007/s11255-009-9616-z

3.Cakir Evrim, Ozbek Mustafa, Ozkaya Enes, Colak Nujen(4), Cakal Erman, Sayki Muyesser, Gungunes Askin, Aliyazicioglu Y, Mentese A, Delibasi Tuncay (2011). Oxidative stress markers are not valuable markers in lean and early age of polycystic ovary syndrome patients. Journal of Endocrinological Investigation, 34(7), 178-182, Doi: 10.3275/7352

4.Özbek Mustafa, Çakır Evrim, Özkaya Enis, Çolak Nujen(4), Çakal Erman, Yazıcıoglu Yüksel Ali,Mentese Ahmet, Turan Ibrahim, Delibası Tuncay (2011). Oxidative stress markers in metabolic syndrome. Turkish Journal of Endocrinology and Metabolism, 15, 57-61.

5.Karbek Basak, Özbek Mustafa, Bozkurt Nujen(3), Ginis Zeynep, Güngünes Askın, Ünsal Ilknur, Cakal Erman, Delibası Tuncay (2011). Heart-Type Fatty Acid Binding Protein (H-FABP): Relationship with arterial ıntima- media thickness and role as diagnostic marker for atherosclerosis in patients with ımpaired glucose metabolism. Cardiovascular Diabetology, 10(1), 37, Doi: 10.1186/1475-2840-10-37

6.Bozkurt Nujen Colak(1), Karbek Basak, Cakal Erman, Firat Hikmet, Ozbek Mustafa, Delibasi Tuncay (2012). The association between severity of obstructive sleep apnea and prevalence of Hashimoto's thyroiditis. Endocrine Journal, 59(11), 981-988, Doi: 10.1507/endocrj.EJ12-0106.

7.Bozkurt Nujen Colak(1), Cakal Erman, Sahin Mustafa, Ozkaya Evrim Cakir, Firat Hikmet, Delibasi Tuncay (2012). The relation of serum 25-hydroxyvitamin-D levels with severity of obstructive sleep apnea and glucose metabolism abnormalities. Endocrine, 41(3), 518-525., Doi: 10.1007/s12020-012-9595-1

8.Cakir Evrim, Sahin Mustafa, Topaloglu Oya, Colak Nujen(4), Karbek Basak, Gungunes Askin, Arslan Muyesser, Unsal Ilknur, Tutal Esra, Ucan Bekir, Delibasi Tuncay (2012). The relationship between LH and thyroid volume in patients with PCOS. Journal of Ovarian Research, 5(1), 43, Doi:10.1186/1757-2215-5-43

9.Duru Serap, Firat Ibrahim Hikmet, Colak Nujen(3), Ginis Zeynep, Delibasi Tuncay, Ardiç Sadik (2012). Serum S100B protein: a useful marker in obstructive sleep apnea syndrome. Neurologiai Neurochirurgia Polska, 46(5), 450-455, Doi: 10.5114/ninp.2012.31355

10.Cakir Evrim, Ozbek Mustafa, Colak Nujen(3), Cakal Erman, Delibasi Tuncay (2012). Is NAFLD an independent risk factor for increased IMT in T2DM? Minerva Endocrinologica, 37(2), 187-193 İmpakt faktörü: 1,46

11.Fırat Hikmet, Çolak Nujen(2), Bilgin Esra, Çakal Erman, Yüceege Melike, Demir Ahmet, Ardıç Sadık, Delibası Tuncay (2012). Relationship between non-thyroidal illness syndrome and obstructive sleep apnea syndrome. Turkish Journal of Geriatrics, 15(2), 121-126.

12.Cakal Erman, Cakir Evrim, Dilli Alper, Colak Nujen(4), Unsal Ilknur, Aslan Müyesser Sayki, Karbek Basak, Ozbek Mustafa, Kilic Mehmet, Delibasi Tuncay, Sahin Mustafa (2012). Parathyroid adenoma screening efficacies of different imaging tools and factors affecting the success rates. Clinical Imaging, 36(6), 688-694., Doi: 10.1016/j.clinimag.2012.01.

13.Sahin Mustafa, Dilli Alper, Karbek Basak, Unsal Ilknur Oztürk, Gungunes Askın, Colak Nujen(6), Uçan Bekir, Cakal Erman, Ozbek Mustafa, Delibasi Tuncay (2012). Unusual cause of primary amenorrhea due to kissing internal carotid arteries. Pituitary, 15(2), 258-259., Doi: 10.1007/s11102-012-0393-9.

14.Bozkurt Nujen Colak(1), Karbek Basak, Ucan Bekir, Sahin Mustafa, Cakal Erman, Ozbek Mustafa, Delibasi Tuncay (2013). The Association Between Severity of Vitamin D Deficiency and Hashimoto's Thyroiditis. Endocrine Practice, 19(3), 479-484, Doi: 10.4158/EP12376.OR

15.Karbek Basak, Cakal Erman, Cakir Evrim, Bozkurt Nujen Colak(4), Unsal Ilknur, Sahin Mustafa,Delibasi Tuncay (2013). Cardiovascular risk factors, carotid artery intima media thickness, and HSCRP levels in patients with impaired glucose metabolism. Minerva Endocrinologica, 38(3), 297-304.

16.Sahin Mustafa, Uçan Bekir, Ginis Zeynep, Topaloglu Oya, Güngünes Askın, Bozkurt Nujen Çolak(6), Arslan Müyesser Sayki, Ünsal Ilknur Öztürk, Akkaymak Esra Tutal, Demirci Taner, Karaköse Melia,Çalıskan Mustafa, Çakal Erman, Özbek Mustafa, Delibası Tuncay (2013). Vitamin D3 levels and insulin resistance in papillary thyroid cancer patients. Medical Oncology, 30(2), 589, Doi: 10.1007/s12032-013-0589-5

17.Bozkurt Nujen Colak(1), Leao Peixoto Eduardo Moraes, Froud Tatiana, Herrada Eva, Corrales Andrea,Ricordi Camillo, Alejandro Rodolfo (2013). Hepatic Hematoma After Islet Cell Transplantation. Transplantatıon, 95(12), 73-76., Doi: 10.1097/TP.0b013e31829468e2.

18.SahinMustafa,ÇakalErman,ÖzbekMustafa,GüngünesAskın,ArslanMüyesserSayki,AkkaymakEsraTutal, Uçan Bekir, Ünsal Ilknur Öztürk, Bozkurt Nujen Çolak(9), Delibası Tuncay (2014). Elastography in the differential diagnosis of thyroid nodules in Hashimoto thyroiditis. Medical Oncology, 31(8), Doi: 10.1007/ s12032-014-0097-2

19.Karbek Basak, Bozkurt Nujen Colak(2), Topaloglu Oya, Aslan Muyesser Sayki, Gungunes Askin, Cakal Erman, Delibasi Tuncay (2014). Relationship of vaspin and apelin levels with insulin resistance and atherosclerosis in metabolic syndrome. Minerva Endocrinologica, 39(2), 99-105.

20.Peixoto Eduardo Leao, Bozkurt Nujen Colak(2), Messinger Shari, García Maria Isabel delOlmo, Lauriola Vincenzo, Corrales Andrea, Herrada Eva, Ricordi Camillo, Alejandro Rodolfo (2014). The Use of 1.5- Anhydroglucitol for Monitoring Glycemic Control in Islet Transplant Recipients. Cell Transplantation, 23(10), 1213-1219, Doi:10.3727 /096368913X669734.

21.Çakır Evrim, Topaloglu Oya, Çolak Bozkurt Nujen(3), Karbek Bayraktar Basak, Güngünes Askın, Saykı Arslan Müyesser, Öztürk Ünsal Ilknur, Tutal Esra, Uçan Bekir, Delibası Tuncay (2014). Insulin-like growth factor 1, liver enzymes, and insulin resistance in patients with PCOS and hirsutism. Turkısh Journal Of Medıcal Scıences, 44, 781-786., Doi: 10.3906/sag-1303-80.

22.Cakal Erman, Sahin Mustafa, Unsal Ilknur Ozturk, Gungunes Askin, Akkaymak Esra, Ozkaya Evrim Cakir, Bozkurt Nujen Colak(7), Ozbek Mustafa, Delibasi Tuncay (2014). Elastography in the Differential Diagnosis of Thyroid Nodules. Ultrasonic Imaging, Doi: 10.1177/0161734614547542.

23.Ucan Bekir, Delibasi Tuncay, Cakal Erman, Arslan Muyesser Sayki, Bozkurt Nujen Colak(5), Demirci Taner, Özbek Mustafa, Şahin Mustafa (2014) Papillary thyroid cancer case masked by subacute thyroiditis. Arq Bras Endocrinol Metabol. 58(8):851-4. Epub 2014 Nov 1.

24.Karbek Basak, Ozbek Mustafa, Karakose Melia, Topaloglu Oya, Bozkurt Nujen(5), Cakır Evrim, Aslan Muyesser, Delibasi Tuncay (2014). Copeptin, a surrogate marker for arginine vasopressin, is associated with cardiovascular risk in patients with polycystic ovary syndrome. Journal of Ovarian Research, 7(1), 31, Doi: 10.1186/1757-2215-7-31.

25.Sefayet Karaca, Nujen Colak Bozkurt(2), Tomris Cesuroglu, Mehmet Karaca, Mehmet Bozkurt, Erdal Eskioglu, Renato Polimanti. International warfarin genotype-guided dosing algorithms in the Turkish population and their preventive effects on major and life-threatening hemorrhagic events. Pharmacogenomics;16(10):1109-18. doi: 10.2217/pgs.15.58.

26.Tuncay Delibasi, Basak Karbek, Nujen Colak Bozkurt(3), Evrim Cakir, Askin Gungunes, İlknur Öztürk Ünsal, Muyesser Sayki Aslan, Erman Cakal. (2015) Circulating E-selectin levels and insulin resistance are associated with early stages of atherosclerosis in nonfunctional adrenal incidentaloma. Arch Endocrinol Metab. (Arq Bras Endocrinol Metabol) Aug;59(4):310-7. doi: 10.1590/2359-3997000000053.

27.Nujen Çolak Bozkurt(1), Selvihan Beysel, Başak Karbek, İlknur Öztürk Ünsal, Evrim Çakır, Tuncay Delibaşı (2016) Visceral Obesity Mediates the Association Between Metabolic Syndrome and Obstructive Sleep Apnea Syndrome. Metab Syndr Relat Disord. doi: 10.1089/met.2015.0086.

28.Ucan B, Sahin M, Sayki Arslan M, Colak Bozkurt N, Kizilgul M, Güngünes A, Cakal E, Ozbek M. Vitamin D Treatment in Patients with Hashimoto's Thyroiditis may Decrease the Development of Hypothyroidism. Int J Vitam Nutr Res. 2017 Jul 12:1-9. doi: 10.1024/0300-9831/a000269.


B. Articles and case reports published in refereed journals outside the scope of international SCI/SCI-E index:


1.Bozkurt Nujen(1), Karbek Basak, Özkaya Evrim, Çakal Erman, Delibasi Tuncay (2011). Struma ovarii presenting with Hashimoto's thyroiditis: a case report. Journal of Medical Case Reports, 5(1), 572, Doi: 10.1186/1752-1947-5-572

2.Cakir Evrim, Ozbek Mustafa, Colak Nujen(3), Cakal Erman, Delibasi Tuncay (2012). Hypokalemia with ECG Abnormalities Mimicking Acute Coronary Syndrome in a Diabetic Ketoacidotic Patient. Journal of Academic Emergency Medicine Case Reports, 3(1), 18-20., Doi: 10.5505/jaemcr. 2011.78942

3.Unsal Ilknur Ozturk, Topaloglu Oya, Cakir Evrim, Bozkurt Nujen Colak(4), Karbek Basak, Gungunes Askin, Arslan Muyesser Sayki, Akkaymak Esra Tutal, Ucan Bekir, Demirci Taner, Karakose Melia,Caliskan Mustafa, Cakal Erman, Delibasi Tuncay (2014). Effect of L-thyroxin therapy on thyroid volume and carotid artery lntima-media thickness in the patients with subclinical hypothyroidism. Journal of Medical Disorders, 2(1), 1, Doi: 10.7243/2053-3659

4.Mine Araz, Derya Cayir, Nujen Colak Bozkurt, Ulku Yazici, Erman Cakal. (2016) Unexpected Appearance of Ectopic Mediastinal Toxic Nodulary Thyroid Hyperplasia in a Case of Recurrent Hyperthyroidism. International Journal of Nuclear Medicine Research, 2016, 3, 41-44


C. Books:

Cardiovascular Surgery (Editors: Prof. Dr. Mustafa Paç, Prof. Dr. Atıf Akçevın, Dr. Serap Aykut Aka, Prof. Dr. Suat Büket, Prof. Dr. Tayyar Sarıoglu). Chapter 48; Cardiovascular Surgery and Diabetes Mellitus (Authors: Nujen Çolak Bozkurt, Tuncay Delibaşı). Nobel Medical Publishing, 2nd Edition, ISBN: 9789755670799, Turkish (Scientific Book), 2013.


From the Past to the Future: Diabetes Mellitus (Editors: Prof. Dr. Şazi İmamoğlu, Prof. Dr. İlhan Satman, Prof. Dr. N. Sema Akalın, Dr. Serpil Salman, Prof. Dr. Candeğer Yılmaz). Chapter 72; Pancreatic Islet Cell Transplantation in Diabetes Treatment and its Situation in Turkey (Authors: MS Aslan, NÇ Bozkurt, H Altunbaş, T Delibaşı). Turkish Society of Endocrinology and Metabolism, 1st Edition, ISBN: 978-605-4011-24-7, 2015.

Clinical Endocrinology (Editors: Saffron Whitehead, John Miell). Chapter 2; Pituitary Gland (Translated by: Nujen Çolak Bozkurt). Translation Editor: Prof. Dr. Tuncay Delibaşı, Assistant Translation Editor: Dr. Erman Çakal). Pelikan Publishing, 1st Edition, ISBN: 9786059160, 2015.


Memberships

Turkish Society of Endocrinology and Metabolism (TEMD)

Clinical Endocrinology and Diabetes Association (KEDD)

European Society of Endocrinology (ESE/EASD)

American Association of Clinical Endocrinology (AACE)

Medical Second Opinion
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