Specializations
Weight Loss / Gain Programs
Nutrition in Bariatric Surgery
Nutrition in Diabetes
Childhood Nutrition
Pregnancy Nutrition
Nutrition in Cardiovascular Diseases
Nutrition in Digestive System Diseases
Nutrition During Breastfeeding
Education
1991 to 1997 Istanbul University Cerrahpaşa Faculty of Medicine
1998 to 2003 Ministry of Health Göztepe Training and Research Hospital
Experience
1997 to 1998 Van Edremit Health Center
1998 to 2003 Ministry of Health Göztepe Training and Research Hospital, Resident Doctor
2004 to 2007 Sivas State Hospital, General Surgery Clinic, Specialist Doctor
2007 to Present Medical Park Bahçelievler Hospital, Associate Professor
Professional Memberships
-Turkish Medical Association
-Turkish Surgical Society
-Society of Bariatric and Metabolic Surgery
-Turkish Society of Colon and Rectal Surgery
-Society of Endocrine Surgery
Dr. Hector Acosta is the Chief Anesthesiologist at OCC. He is certified by the Mexican Council of Anesthesiologists. He completed his residency in anesthesiology at the Autonomous University of Baja California General Hospital.
He has over 19 years of clinical practice. He leads anesthesia services in a busy surgical setting. He oversees patient safety and improves perioperative care. He manages a multidisciplinary team to keep operations smooth. He has worked at OCC since 2007 and supports the center’s weight-loss surgery program.
プラガー教授は、ヨーロッパで最も経験豊富な、そして最も優れた消化器専門医および肥満外科手術のスペシャリストの一人です。
ゲーハルト・プラガー教授は、あらゆる種類の肥満手術を専門としています。彼は、肥満治療のために3,000以上の手術を行ってきました。
Dr. Rafał Marszałek is a general, oncologic, and bariatric surgeon. He specializes in minimally invasive and laparoscopic techniques. He leads the General Surgery Department at the Hospital in Legionowo, affiliated with the Military Medical Institute. He has many years of clinical experience from leading centers in Warsaw and the region.
As department head, he applies current treatment standards and advances modern surgical practice. The unit performs a high volume of procedures each year and provides full perioperative care. His key focus is bariatric surgery. He manages patient qualification, selects tailored laparoscopic methods, and provides postoperative monitoring. The goal is durable weight loss and reduced obesity‑related risk. His work also includes hernia repair, gallbladder surgery, thyroid and parathyroid surgery, breast surgery, and oncologic procedures.
Dr. Cemal Kara is a general surgeon with 26 years of experience. He specializes in cosmetic and weight-loss surgeries. He has performed more than 6,200 procedures. Dr. Kara co-founded the Aegean Medical Health Center and is recognized as a leader in his field.
He holds a Certificate of Surgical Competence from the Turkish Surgical Association, awarded in 2008. Dr. Kara has received several awards in both international and national scientific competitions. He invented and patented a laparoscopic surgical instrument. He has also published over 30 medical articles.
Dr. Kara is an active member of several professional organizations. These include the Turkish Surgical Association, Turkish Colon and Rectum Surgery Association, and the Aegean Region Surgery Association.
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I was born in 1967 in Izmir.
I have a happy marriage. I am the father of 3 beautiful girls, more beautiful than each other.
I have a love for Altınordu,inherited from my father.
I speak English and French.
The education you have received describes you…
After becoming a general surgery specialist in 1996, I served as a General Surgery and Organ Transplantation Specialist at SSK (social insurance institution), for a period of 9 years. In 2005, was granted the title of Associate Professor-General Surgery. Between 2005 and 2012, I established the kidney transplant centers in İzmir Private Kent Hospital, Istanbul Private Gaziosmanpasa Hospital, and Medicalpark Goztepe Hospital respectively, and served as the chief executive of these centers.
I have worked in İzmir Private Kent Hospital since 2013. I established Obesity Clinic at Gazi Hospital, and performed more than 200 gastric reduction operations.
More than 50 international publications
Approximately 100 national publications
Section authorship of 12 books
Editorship of 2 books
Serving as a lecturer, session moderator, science board member, and regulatory board member in many scientific congresses held both at home and abroad.
Serving as a referee and editor in domestic and international magazines.
Citation in approximately 100 international scientific publications
Awards
Certificate of Achievement granted by SSK General Directorate for the first kidney transplant operations performed at SSK Hospitals (1997).
Young Researcher Award in ONKKD (Turkish Organ Transplantation Centers Coordination Association) 2002 Congress held in Adana (2002).
Certificate of Appreciation granted by SSK General Directorate for the first small intestine transplant in Turkey (2003).
Young Researcher Award in the World Congress of Nephrology held in Berlin (2003).
The Firsts
Besides these, I have broken many new grounds in Turkey.
Laparoscopic donor nephrectomy (laparoscopic removal of the donor kidney intended to be transplanted) (2004)
Kidney-transplant without tissue adaptation (2005)
Cross-over (cross-donor) kidney transplantation (2005)
Small intestine transplantation (2005)
I have worked in the management boards of many associations engaging in scientific and social activities, and served as a founding member in some of them.
The most important one of these is that I have served as a coordinator in the project intended for providing 150.000 elementary school students and 5,000 adults with training on organ donation, for a period of 10 years, through various social activities.1
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Dr. Taha Sonmez is a renowned aesthetic plastic and reconstructive surgeon with over 17 years of professional experience. He specializes in a variety of procedures including hand surgery, tissue transplants, rhinoplasty, liposuction, body shaping, and head and neck surgery. Dr. Sonmez has received recognition as the Best Male Plastic Surgeon in Turkey and is affiliated with several esteemed medical associations. His range of operations includes liposuction, breast lift, rhinoplasty (nose job), tummy tuck, otoplasty (ear surgery), botox injections, stem cell rejuvenation therapy, and various types of liposuction.
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Dr. Osman Aktas has been serving as a general surgeon at Ataşehir Avicenna Hospital since 2005. Born in Kayseri in 1960, he graduated with his medical degree from Ankara University in 1983. Following his graduation, he fulfilled his military service in medical units for two years. He completed his general surgery residency at GATA from 1986 to 1990. After specializing in general surgery, He held key positions as head of general surgery departments and chief physician in several prominent military hospitals, including Tatvan, Diyarbakır, Ankara, and Manisa.
Dr. Osman has had a special focus on endoscopic surgery since 1995. He received advanced training in laparoscopic surgery techniques in Germany and has successfully performed a wide range of laparoscopic procedures. His expertise extends to gallbladder surgery, abdominal wall and inguinal hernia repairs, appendicitis, reflux and stomach surgeries, as well as complex cases such as gastrointestinal tumors, intestinal obstructions, and various other intestinal diseases, all managed through minimally invasive methods.
In 2002, Dr. Osman transitioned to the private sector, where he broadened his practice to include modern treatments for anal diseases like hemorrhoids, fistulas, and fissures, utilizing advanced techniques such as laser therapy.
Dr. Osman is also recognized for his significant contributions to oncological surgery. He has a wealth of experience in the surgical treatment of various cancers, including breast and thyroid cancer, where he has implemented new treatment methods that reduce the risk of complications. His surgical expertise spans critical cancer surgeries, such as the Whipple procedure for pancreatic cancer, colorectal cancer resections, gastric cancer, and other complex malignancies. Additionally, his skills in metabolic surgery have led to lasting outcomes for patients suffering from obesity and diabetes, ensuring a better quality of life through sustained weight loss and reduced risk of diabetes.
With his vast experience and advanced skills in both laparoscopic and cancer surgeries, Dr. Osman remains at the forefront of surgical excellence, offering innovative and comprehensive care to all his patients.
Some of the most relevant points in Dr. Rosales' CV are:
- Dr. Gabriel Rosales obtained his medical degree from the Universidad de Monterrey in Monterrey, Mexico, accredited by the Southern Association of Colleges and Schools (SACS).
- He completed his residency in general surgery and advanced laparoscopy at the Hospital Christus Muguerza Alta Especialidad hospital endorsed by the Joint Commission International (JCI).
- He completed his advanced training in laparoscopic skills at the Hospital Christus Muguerza Alta Especialidad.
- Member of the International Federation for the Surgery of Obesity and Metabolic Diseases (IFSO)
- Member of the American Society of Endoscopist Surgeons (ASMBS)
- Active Member of the Society of American Gastrointestinal and Endoscopic Surgeons (SAGES) .
- Member of the Mexican Association of Endoscopic Surgery.
- Belongs to the International Council of Medicine and Surgery based on the United States (International Board of Medicine and Surgery (IBMS).
- Certified by the Mexican Council of General Surgery.
- Has completed multiple training courses in Mexico and the United States.
- Member of the surgical staff of the most recognized Hospitals in northern Mexico.
- As an experienced surgeon in obesity surgery in Monterrey, Piedras Negras and Laredo, he is recognized by his patients and colleagues.
EXPERIENCE AND STUDIES/MEETINGS
He focused his career in the field when he realized that bariatric surgery procedures offer patients such a life-changing experience.
Throughout his career he has participated in more than 8000 gastric sleeve and Lap band procedures.
- Completed his general surgery and advanced laparoscopic residency at Christus Muguerza High Speciality Hospital a Joint Commission International accredited hospital.
- Multiple training courses in Mexico and USA.
- As an experienced weight loss surgeon in Piedras Negras, Nuevo Laredo and Monterrey, Mexico, he is highly regarded by his patients and peers a like.
These professional affiliations allow Dr. Rosales to remain on the leading-edge of developments in weight loss surgery, so that he can provide innovative, effective treatment to all of his patients. Fluent in English and Spanish, Dr. Rosales welcomes patients from throughout Mexico, the United States, and Canada.Dr. Rosales takes pride in his work, and nothing gives him more satisfaction than the health, happiness, and joy that his patients are able to achieve following weight loss surgery.
Dr. Gabriel Rosales earned his medical degree at the Universidad de Monterrey in Monterrey, Mexico, a Southern Association of Colleges and Schools accredited university. (SACS from the U.S.)
He completed his residency in General Surgery at Christus Muguerza High Specialty Hospital.
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Dr. Nail Ersoz is a highly accomplished surgeon with credentials from Erciyes and Fırat Universities, as well as experience from Sevgi and Dünyam Hospitals. He has achieved 1st place in the Turkish Surgery Association Board Exam and has published numerous national scientific publications. His areas of expertise include General Surgery, Gluteal Abscess, Breast Cancer, Polyps, Reflux, and Colon Cancer, among many others.
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Dr. Specialist Surgeon Rafail Ibayev is an expert in advanced gastrointestinal surgery. He specializes in both laparoscopic and open procedures for diseases of the stomach, intestine, and rectum. Dr. Ibayev is a recognized leader in obesity and metabolic surgery. He has extensive experience in sleeve gastrectomy, gastric bypass, and gastric balloon procedures. His patients achieve high success rates in weight management and metabolic health.
Dr. Ibayev is known for his work in minimally invasive surgery. He performs a wide range of laparoscopic operations that help patients recover faster and with less scarring. He is also skilled in endocrine and breast surgery, including advanced oncoplastic techniques for both benign and malignant conditions. As a gastrointestinal cancer specialist, he performs complex surgeries for liver, stomach, and colorectal tumors. He provides modern and effective oncological care.
Dr. Ibayev is highly trained in anti-reflux surgery, treatment of digestive disorders, endoscopic procedures, hernia repair, splenectomy, and proctologic surgeries. He is committed to patient-centered care and long-term health outcomes.
Education
Experience
Professional Memberships
TTB-Istanbul Medical Chamber
Turkish Surgery Association
Turkish Colon and Rectum Surgery Association
Turkish Hepato-Pancreato-Biliary Surgery Association
Procedures Performed
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Dr. Abu Shamsiya Rami Nuamanovych is a specialist in general and laparoscopic surgery, oncology, and ultrasound diagnostics. He is a Candidate of Medical Sciences, an associate professor, and a doctor of the highest category. Dr. Nuamanovych is a member of the Ukrainian Association of Bariatric Surgeons and the World Organization of Bariatric Surgeons (IFSO).
He works as a WHO consultant on laparoscopic surgery. He is also President of the Association of Arab Doctors of Ukraine. Dr. Nuamanovych has performed thousands of surgeries, including hernia repairs, bariatric procedures, and cancer operations. His skills are recognized internationally. He speaks English and Arabic fluently.
After completing her medical education in English at KARADENİZ TECHNİC University Faculty of Medicine in 2005, Volkan TUMENTEMUR gained the title of specialist in the field is General Surgeon of our clinic.
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Kiss. Dr. Lecturer Hüseyin Akyol presents the obesity and metabolic surgery processes of all his patients at the highest standards by using personalized treatment methods, his experienced team and high technology equipment. Operations and treatment follow-up processes are carried out in fully equipped and up-to-date A-plus hospitals.
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Assoc. Dr. Ali DURMUŞ was born in the Fevzipaşa township of İslahiye, Gaziantep. Because his father worked at Tekel, he started his education at Malatya Derme Primary School and completed it at Adıyaman Atatürk Primary School. When his father was appointed to Amasya Taşova district, he attended secondary school at Taşova Atatürk Secondary School. He finished high school at Gaziantep Kilis High School, ranking 3rd.
Since his uncle was in Çanakkale, he chose Çanakkale Education Institute as a university. Assoc. Prof. Dr. is a teacher. Ali Durmuş was appointed to Yukarı Tutak village in Ağrı's Diyadin district within the scope of compulsory service. After working as a teacher for a period, he took the university exam again.
He was accepted to Erciyes University Faculty of Medicine, one of the two medical faculties that taught in English at that time. He completed one year of English preparation and 6 years of medical education without any loss. He was a member of the ski team and basketball team at the university, and also managed social events such as the annual medical ball.
He was assigned to Iskenderun State Hospital in compulsory service. Assoc. Prof. Dr., who served as the emergency manager. Ali Durmuş passed the General Surgery Department of Okmeydanı Training and Research Hospital in the Medical Specialization Exam. Assoc. Prof. Dr. completed his specialization and became a specialist. Due to his success in his compulsory service, Ali Durmuş was appointed as assistant chief physician to the Oncology department at Okmeydanı Training and Research Hospital.
Later, he was appointed as a training officer in the Department of General Surgery and Gastroenterology. He helped develop laparoscopic stomach and intestinal surgeries (sleeve gastrectomy, gastric bypass, reflux, colon cancer, stomach cancer, etc.) in Turkey. Between 2002 and 2015, he trained dozens of assistants and helped them become general surgeons.
In 2015, he left his job in Okmeydanı and worked as Assistant Professor. He started working as a faculty member at Nişantaşı University.
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