Dr. Gulumser Kiziltas Tokmak is a neurologist at Hisar Hospital Intercontinental in Istanbul. She holds a master’s degree in electrophysiology from Istanbul University. Dr. Tokmak specializes in brain health, treating conditions like dementia, chronic headaches, and vertigo. She works at a JCI-accredited facility known for international patient safety standards.

• Specializes in diagnostic studies including EMG, EEG, and polysomnography (PSG).
• Treats complex neurodegenerative disorders like Alzheimer’s, Parkinson’s, and multiple sclerosis.
• Manages specialized neurological therapies, including medication for essential tremors and ALS.
• Performs advanced diagnostic monitoring, such as video-EEG and electroneurography.

2022 - Present, Istanbul/Türkiye

MEMORIAL BAHCELIEVLER HOSPITAL

Pediatric Neurology Specialist

2021 - 2022, Istanbul/Türkiye

BEZMIALEM FOUNDATION UNIVERSITY

Pediatric Neurology Specialist

2020 - 2021, Istanbul/Türkiye

ISTANBUL BAGCILAR EDUCATION AND RESEARCH HOSPITAL

Pediatric Neurology Specialist (Compulsory Service)

2019 - 2020, Izmir/Türkiye

IZMIR BEHÇET UZ CHILD HEALTH DISEASES AND SURGERY TRAINING AND RESEARCH HOSPITAL

Pediatric Neurology Specialist (Compulsory Service)

2013 - 2015, Istanbul/Türkiye

ISTANBUL GAZİOSMANPAŞA TAKSİM FIRST AID TRAINING RESEARCH HOSPITAL

Pediatric Specialist (Compulsory Service)

AFTER COMPLETING MY MEDICAL EDUCATION AT BURSA ULUDAĞ UNIVERSITY FACULTY OF MEDICINE BETWEEN 2007-2014, I COMPLETED MY CARDIOLOGY EDUCATION AT ERZURUM ATATÜRK UNIVERSITY FACULTY OF MEDICINE BETWEEN 2015-2019. AFTER COMPLETING MY COMPULSORY SERVICE IN ERZURUM, I WORKED IN DÜZCE ATATÜRK STATE HOSPITAL BETWEEN 2021-2022. AS OF SEPTEMBER 2022, I HAVE BEEN PROVIDING CARDIOLOGY POLYCLINIC SERVICE IN HİSAR INTERCONTIINENTAL HOSPITAL. 

MEDICAL INTERESTS

• Diagnosis of Coronary Artery Disease (Stress Test, MPS, Coronary Angiography) and Treatment (Stent, Balloon)
• Diagnosis and Treatment of Heart Failure
• Heart Valve Diseases
• Hypertension
• Transesophageal Echocardiography (TEE)
• Diagnosis (Holter Monitoring) and Treatment of Arrhythmias
•  

Dr. Rahib Hasanov is a medical oncologist. He graduated from Istanbul University Cerrahpaşa Faculty of Medicine (1999–2005). He completed an internal medicine residency (2009–2013) and a medical oncology fellowship at Marmara University (2015–2018). He also completed an observership at Houston Methodist Hospital (2006–2007).

He focuses on personalized oncology. His treatments include immunotherapy, targeted therapy, and novel agents. His clinical interests include gastrointestinal, breast, lung, and genitourinary cancers.

He attends national and international conferences. He welcomes patients from Turkey, Azerbaijan, Montenegro, Georgia, Uzbekistan, the Middle East, Europe, and the United States.

Dr. Toluy Özgümüş has graduated from Istanbul University, Cerrahpaşa Faculty of Medicine in 2008 and completed his internal medicine specialty training at Haydarpaşa Numune Training and Research Hospital between 2009 and 2013. He received his Hematology subspecialty training at Marmara University Hematology Department between 2014-2017; He performed his compulsory service at Kars Harakani State Hospital between 2017-2019. He worked at Sancaktepe Şehit Prof. Dr. Ilhan Varak Training and Research Hospital between 2019-2023.

He is experienced in the field of bleeding and coagulation disorders, especially coagulation disorders (thrombophilia), and has dealt with the diagnosis and treatment of more than 1000 patients. Since he worked in the pandemic hospital of the Anatolian side of Istanbul during the pandemic period, he has extensive experience in the hematological findings of Covid-19 infection and the management of Covid-19 infection in hematological diseases. Hundreds of patient experiences are available in the diagnosis of myeloproliferative diseases such as Polycythemia Vera and Essential Thrombocytosis, in their differentiation from blood cell elevations due to other frequently confused causes, and in their treatment. He has experience in the diagnosis and all treatment processes of rare hematological cancers such as multiple myeloma, acute and chronic leukemias, lymphomas and histiocytosis, as well as bone marrow transplantation.

MEDICAL INTERESTS 

Clotting Disorders (Thrombophilia)

Bleeding Disorders

Myeloproliferative Diseases

Anemias (Anemia)

Acute and Chronic Leukemias

lymphomas

Bone marrow transplantation

2009 - Present, Istanbul/Istanbul/Türkiye

MEMORIAL SISLI HOSPITAL

Orthopedics and Traumatology Specialist

2009 - 2009, Istanbul/Istanbul/Türkiye

MEDICANA INTERNATIONAL ISTANBUL HOSPITAL

Orthopedics and Traumatology Specialist

2008 - 2009, Istanbul/Istanbul/Türkiye

Esenler Life Hospital

Orthopedics and Traumatology Specialist

2006 - 2008, Van/Van/Türkiye

VAN STATE HOSPITAL

Orthopedics and Traumatology Specialist

Prof. Dr. Şebnem İzmir Güner was born in 1970 in Istanbul and took her first steps in her medical career at Istanbul University Faculty of Medicine. Successfully completing her undergraduate and medical education here between 1987-1993, Güner received her internal medicine specialty training at Istanbul University Cerrahpaşa Faculty of Medicine from 1995 to 2000. Deepening her interest in hematology, Prof. Dr. Güner completed her hematology subspecialty training at Cerrahpaşa Faculty of Medicine again between 2003-2006, solidifying her expertise in this field.
Prof. Dr. Güner’s professional journey began as an internal medicine specialist at Istanbul Education and Research Hospital from 2000 to 2003. She established the Hematology Clinic at the same hospital from 2006 to 2010 and served as the responsible physician. Here, she developed innovative approaches in the treatment of patients and made significant contributions to the field of hematology. From 2010 to 2016, she established the Hematology Clinic, Therapeutic Apheresis, and Adult Bone Marrow Transplantation Center at Medicalpark Bahçelievler Hospital and served as the responsible physician. During this period, she conducted studies that set national and international standards in the field of hematology.
Between 2016-2018, Prof. Dr. Güner took on similar roles at Şişli Kolon International Hospital, where she was also the founder and responsible physician of the Hematology Clinic, Therapeutic Apheresis, and Adult Bone Marrow Transplantation Center. Güner, who became an associate professor in 2017, obtained her professorship title in 2023. Between 2019-2024, she worked at Memorial Şişli Hospital in the Hematology Clinic, Therapeutic Apheresis, and Adult Bone Marrow Transplantation Center.
Prof. Dr. Şebnem İzmir Güner is recognized for her scientific contributions, with over 19 articles published in international peer-reviewed journals. Additionally, she has over 18 articles published in national peer-reviewed journals and 51 presentations at national scientific meetings that have been published in proceedings books. She has also made a name for herself in the academic world with over 18 presentations at meetings and published in proceedings books. Güner, who has held positions on the boards of domestic hematology associations and has active memberships, has crowned her success with more than three awards given at universities and conferences.
Prof. Dr. Şebnem İzmir Güner, who speaks English and German, is also recognized as an educator. In this capacity, she has contributed to the training of young doctors in the field of hematology, providing education to research assistant doctors and students.
Prof. Dr. Şebnem İzmir Güner has established a respected place in the field of hematology with her achievements and scientific contributions throughout her professional life, continuing her career as a physician who inspires her patients and colleagues.

MEDICAL INTERESTS

• Leukemia
• Lymphoma
• Multiple myeloma
• Bone marrow transplantation
• Anemia
• Bleeding and coagulation disorders
• Hemophilia

EXPERIENCE

2024 - Currently, Istanbul/Turkey

MEMORIAL ŞİŞLİ HOSPITAL

INTERNAL DISEASES AND HEMATOLOGY SPECIALIST

2010 - 2013, Istanbul/Turkey

İSTANBUL BİLİM UNİVERSİTY FACULTY OF MEDİCİNE DEPT OF INTERNAL MEDİCİNE/HEMATOLOGY

PROFESSOR

2010 - 2024, Istanbul/Turkey

ISTANBUL FLORENCE NİGHTİNGALE HOSPİTAL ADULT HSCT UNİT

Director

2008 - 2008, Minnesota/ABD

UNİVERSİTY OF MİNNESOTA DEPT. OF HOT, BMT UNİT

Visiting Professor

2004 - 2009, Ankara/Turkey

ANKARA UNİVERSİTY FACULTY OF MEDİCİNE DEPT. OF HEMATOLOGY

Assoc. Prof.

2001 - 2004, Ankara/Turkey

ANKARA UNİVERSİTY FACULTY OF MEDİCİNE DEPT. OF HEMATOLOGY

Hematologist

1999 - 2001, Ankara/Turkey

ANKARA UNİVERSİTY FACULTY OF MEDİCİNE DEPT. OF HEMATOLOGY

Fellow

1997 - 1999, Ankara/Turkey

ANKARA UNİVERSİTY FACULTY OF MEDİCİNE DEPT. OF HEMATOLOGY

Internist

1996 - 1997, Vienna/Austria

DONAU SPİTAL– UNİVERSİTY OF VİENNA KMT UNİT

Observer

EDUCATION

2001 - 2003, Ankara / Turkey

Ankara University Faculty of Medicine

Hematologist

1996 - 2001, Ankara / Turkey

Ankara University Faculty of Medicine

Internist

1991 - 1996, Ankara / Turkey

Hacettepe University Medical Faculty

MD

2005 - Present, Istanbul/Istanbul/Türkiye

MEMORIAL SISLI HOSPITAL

Ophthalmologist

2004 - 2005, Ankara/Ankara/Türkiye

GATA TRAINING HOSPITAL

Ophthalmologist

2001 - 2004, Muğla/Muğla/Türkiye

MARINE HOSPITAL

Ophthalmologist

1994 - 2001, Istanbul/Istanbul/Türkiye

MARINE HOSPITAL

Ophthalmologist

1991 - 1993, Hatay/Hatay/Türkiye

MARINE HOSPITAL

Ophthalmologist

1986 - 1988, Kocaeli/Kocaeli/Türkiye

COMMODATE OF THE MINESHIP FLOTILLA

General Practitioner

1985 - 1986, Ankara/Ankara/Türkiye

GATA TRAINING HOSPITAL

General Practitioner

Associate Professor Dr. Burak Teymen is a cardiologist. He earned his M.D. from Hacettepe University in 2000 and completed cardiology training in 2005. He specializes in heart and vascular diseases.

He has extensive experience in interventional cardiology, including angiography, balloon angioplasty, and stent placement. He uses up-to-date diagnostic and treatment methods.

He worked at Emsey Hospital from 2014 to 2022. He opened his own clinic in Kadıköy in September 2022.

2015 - Present, Istanbul/Istanbul/Türkiye

MEMORIAL SISLI HOSPITAL

Obstetrician and Gynaecologist

2014 - 2015, Istanbul/Istanbul/Türkiye

ACIBADEM FULYA HOSPITAL

Obstetrician and Gynaecologist

2008 - 2014, Istanbul/Istanbul/Türkiye

KASIMPASA MILITARY HOSPITAL / YESILYURT FAMILY HEALTH CENTER

Obstetrician and Gynaecologist

2001 - 2008, Ankara/Ankara/Türkiye

ETİMESGUT MILITARY HOSPITAL

Obstetrician and Gynaecologist

1995 - 1997, Konya/Konya/Türkiye

KONYA MILITARY HOSPITAL

General Practitioner

Dr. Seniz Ustundag is a certified orthodontics specialist at the JCI-accredited Hisar Hospital Intercontinental. She earned her doctorate from Marmara University with a focus on temporomandibular disorders. Dr. Ustundag treats complex dental alignment issues in children, teens, and adults.

• Performs orthodontic preparation for patients undergoing orthognathic surgery.
• Uses clear aligner systems including Invisalign First, Teen, and MA.
• Specially trained in lingual therapy and Roth techniques.
• Treats congenital conditions such as cleft lip and palate.

Dr. Faruk Eroglu is an ophthalmologist at Hisar Hospital Intercontinental in Istanbul. He has performed over 10,000 argon laser procedures. Dr. Eroglu specializes in retinal diseases, cataract surgery, and excimer laser therapy. He trained at Istanbul University’s Faculty of Medicine. His practice focuses on diabetes-related yellow spot treatment and refractive surgery.

• Completed over 5,000 excimer laser treatments and 1,000 cataract surgeries.
• Maintains membership with the American Academy of Ophthalmology.
• Member of the European VitreoRetinal Society and the International Ocular Inflammation Society.
• Works at Hisar Hospital, a JCI-accredited facility serving 500,000 patients annually.

2021 - Present, Istanbul/Türkiye

MEMORIAL SISLI HOSPITAL

Ear Nose Throat Diseases Specialist

2020 - 2021, Istanbul/Türkiye

SERVICE HOSPITAL

Ear Nose Throat Diseases Specialist

2018 - 2018, /USA

UNIVERSITY OF ARKANSAS FOR MEDICAL SCIENCES

Ear Nose Throat Diseases Specialist Observer

2013 - 2019, Istanbul/Türkiye

BAKIRKÖY DR. SADİ KONUK TRAINING AND RESEARCH HOSPITAL

Ear Nose Throat Diseases Specialist

2016 - Present, Istanbul/Istanbul/Türkiye

MEMORIAL SISLI HOSPITAL

Gastroenterology Specialist

2012 - 2016, Istanbul/Istanbul/Türkiye

BEZMIALEM FOUNDATION UNIVERSITY

Gastroenterology Specialist, Lecturer

2010 - 2012, Diyarbakir/Diyarbakir/Türkiye

DIYARBAKIR TRAINING AND RESEARCH HOSPITAL

Gastroenterology Specialist

2009 - 2010, Istanbul/Istanbul/Türkiye

HASEKİ TRAINING AND RESEARCH HOSPITAL

Gastroenterology Specialist

1996 - 2006, Istanbul/Istanbul/Türkiye

HASEKİ TRAINING AND RESEARCH HOSPITAL

Internal Medicine Specialist

Dr. Mehmet Aydogan is a specialist in Orthopedics, Traumatology, and Spine Surgery at Memorial Şişli Hospital. He worked in Spine Surgery there in 2024–2025 and has been in Orthopedics since 2026. He previously led the Orthopedic Surgery, Traumatology & Advanced Spine Surgery Center at Emsey Hospital (2018–2022). His experience includes the EURO SPINE Surgical Spine Center of Excellence in Switzerland (2022–2024) and a research fellowship at the UCLA Comprehensive Spine Center (2009–2011). He also held posts at Boğaziçi Spine Center, Medical Park Göztepe, and Florence Nightingale.

Education: MD, Ege University (1990–1996). Residency in Orthopedics and Traumatology at Dr. Lütfi Kırdar Kartal TRH (2000–2004). Publications: 50 journal articles and 37 presentations.

Memberships: TTB, TOTBİD, Turkish Spine Society, MINOD, NASS, SRS, European Spine Society, and APSS.

Dr. Volkan Turunc is the Kidney Transplant Center Responsible Specialist at Memorial Sisli Hospital in Istanbul. He specializes in kidney and liver transplantation alongside laparoscopic general surgery. He treats patients at a JCI-accredited facility known for its 90% organ transplant success rate. Dr. Turunc holds dual expertise in both renal and hepatic transplant procedures.

• Specialist in charge of the kidney transplant center at Memorial Sisli.
• Performs complex liver transplant surgeries and laparoscopic interventions.
• Member of the National Association of Endoscopic and Laparoscopic Surgery.
• Member of the Turkish Association of Reconstructive Microsurgery.

Dr. Sinan Çomu is a pediatric neurologist at Memorial Şişli Hospital in Istanbul. He applies American treatment methods learned during his extensive training in the USA. Dr. Çomu treats movement disorders, epilepsy, and developmental delays in children. He is a member of the Child Neurology Society.

• Specializes in pediatric neurology, genetic problems, and behavioral disorders.
• Completed a child neurology residency at the University of Pittsburgh.
• Treats neurological conditions in fetuses during high-risk pregnancies.
• Practices at JCI-accredited Memorial Şişli Hospital.

Dr. Orhan Shencan is a medical oncology specialist. He graduated from Hacettepe University Faculty of Medicine in 1988. He completed his Internal Medicine residency at Ankara Training Hospital between 1990 and 1994. He finished his Medical Oncology training at Ankara University between 1997 and 1999. He became an Associate Professor in Medical Oncology in 2009.

He has held Internal Medicine and Medical Oncology posts at İnönü University, Ankara Training Hospital, and Ankara University Faculty of Medicine. He also worked at Ankara Etlik Specialty Hospital, Private Lokman Hekim Hospital, Acıbadem Maslak Hospital, and Fatih University (Associate Professor, 2012–2016). He later worked at Sante Oncology Center and Medical Park Gebze Hospital.

He practiced at King Hamad University Hospital, Bahrain Oncology Center, from 2017 to 2023. In 2024 he worked at Acıbadem Bodrum Hospital. He currently practices at Avicenna Ataşehir Hospital (2024–) and Lokman Hekim Istanbul Hospital (2025–).

Assoc. Prof. Dr. Oğuzhan BABACAN completed his undergraduate, specialty and sub-specialty education at GATA Military Medical Faculty/Ankara. After becoming a specialist in Pediatrics, he worked in the field of Social Pediatrics for two years, where Healthy Baby Monitoring and vaccine follow-up were carried out. Then, she completed her subspecialty training in Pediatric Hematology and Oncology and continued her studies in the field of pediatric blood and cancer diseases. In addition to the treatment of children suffering from leukemia, lymphoma, solid tumors and other blood diseases, she has been working in the Bone Marrow Transplantation (Transplant) Unit for 13 years in Allogeneic (unrelated and intrafamilial), Autologous (from the patient himself) and Haploidentical (partially HLA compatible) hematopoietic stem cell transplantation. In 2018, he received the title of Associate Professor in the field of Pediatric Hematology and Oncology Science/Art.

MEDICAL AREAS OF INTEREST

Healthy baby follow-up and vaccinations

Lymph node enlargement

Pediatric patients with anemia (anemia)

Leukemia

Lymphoma

Bone Marrow Transplant

ITP

Thalassemias

Hemophiliacs

Solid tumors

Hemangioma

Childhood blood disorders

Children with frequent infections

Fever of unknown origin

Malnutrition in children