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Best Appendectomy gastroenterologists: TOP 102 doctors

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Content meets the Bookimed Editorial Policy and is medically reviewed by
Fahad Mawlood - General practitioner. Winner of 4 scientific awards. Served in Western Asia. Former Team Leader of a medical team supporting Arabic-speaking patients. Now responsible for data processing and medical content accuracy.
Yilmaz Bilgic
Yilmaz Bilgic
Gastroenterologist
24 years of experience
5.0
2 reviews
Turkey, Istanbul
Medipol Acibadem District Hospital

Yilmaz Bilgic

Gastroenterologist
24 years of experience

ACADEMIC CAREER SUMMARY

Degree: Bachelor's
Field: Medicine
University: Atatürk University
Year: 2001

Degree: Master's
Field: Medicine
University: Atatürk University
Year: 2001

Specialization/Doctorate: Internal Medicine/Gastroenterology
University: İnönü University
Year: 2012

Associate Professorship: Gastroenterology
University: İnönü University
Year: 2018

Foreign Language: English, 67.5, 2007

H-index (WoS/Google): 8/10

Impact Factor: 8.1577

Key Research Work:
“Does apocynin increase liver regeneration in the partial hepatectomy model?” Yılmaz Bilgiç, Burhan Hakan Kanat, Onural ÖZHAN, Azibe YILDIZ, Zeynep AKSUNGUR, Mehmet Erman ERDEMLİ, Nigar VARDI, Yusuf TÜRKÖZ, Sami AKBULUT, Adem KÖSE, Hakan PARLAKPINAR. Turkish Journal of Medical Sciences, 2023 (53), 1-12 Q3.

Declared Project Title, Year:
K.3.6. “Investigation of the Effects of Vinpocetine in Sepsis Created by Cecal Ligation and Puncture in Rats” (Principal Investigator), 2023

International Experience:
Advanced Endoscopy Training, Anam Hospital, South Korea (3 months, 2016)
Advanced ERCP Course, Olympus Training Center, Hamburg (2017)

ADMINISTRATIVE POSITIONS

  • Institution: İnönü University Turgut Özal Medical Center
    City: Malatya
    Position: Assistant Chief Physician
    Period: 2021 - 2024
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Samet Yardimci
Samet Yardimci
General surgeon
22 years of experience
5.0
1 review
Turkey, Istanbul
VM Medical Park Pendik Hospital

Samet Yardimci

General surgeon
22 years of experience

Prof. Dr. Samet Yardımcı - Specialist in Gastroenterology and General Surgery

Education and Specialization:

  • Medical Degree: Ankara University Faculty of Medicine (2003)
  • Residency in General Surgery: Haydarpaşa Numune Training and Research Hospital (2003-2009)
  • Fellowship in Gastroenterology Surgery: Türkiye Yüksek İhtisas Training and Research Hospital (2009-2012)

Professional Experience:

  • 2003-2009: Assistant Doctor at Haydarpaşa Numune Training and Research Hospital
  • 2009-2012: Specialist at Türkiye Yüksek İhtisas Training and Research Hospital
  • 2012-2017: Specialist at Marmara University Pendik Training and Research Hospital
  • 2017-2018: Associate Professor at Marmara University Pendik Training and Research Hospital
  • 2018-Present: Professor at VM Medical Park Pendik Hospital

Areas of Expertise:

  • Obesity Surgery
  • Gastroenterology Surgery
  • Reflux Surgery
  • Stomach Surgery
  • Laparoscopic Surgery
  • Inflammatory Bowel Diseases
  • Colorectal Surgery

Research and Publications: Prof. Dr. Yardımcı has numerous publications in international journals, focusing on topics such as liver regeneration, splenic hydatid cysts, and the surgical treatment of gastrointestinal diseases. His research includes innovative methods in bariatric surgery and the treatment of inflammatory bowel diseases.

Certifications and Awards:

  • Turkish Surgery Competency Certificate
  • International Observership Certificate from Memorial Hermann Hospital, Houston, Texas
  • Best Young Researcher Award at the Congress of Transplantation (2011)
  • Istanbul Provincial Health Directorate Patient Satisfaction Certificate

Professional Memberships:

  • Turkish Surgery Association
  • Turkish Hepato-Pancreato-Biliary Surgery Association
  • Gastroenterology Surgery Association
  • Turkish Obesity Surgery Association
  • International Federation for the Surgery of Obesity and Metabolic Disorders
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Akin Unal
Akin Unal
General surgeon
15 years of experience
Turkey, Istanbul
Sava clinic

Akin Unal

General surgeon
15 years of experience

He was born in Istanbul in 1982. He graduated from Kocaeli University, Faculty of Medicine. In 2012, he worked as an emergency medical assistant at Taksim First Aid EAH.

 

Between 2013-2018, he specialized in general surgery at Haseki EAH. Then, between 2018-2020, he completed his compulsory service at Bitlis Tatvan State Hospital. 

Since 2020, with Dr. Hasan Lice, they have worked with the Sava team for bariatric surgeries. He is married and has two kids.

He is also the deputy chief physician of the hospital.

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Dr Sanchez Yague
Dr Sanchez Yague
Gastroenterologist
26 years of experience
4.5
4 reviews
Spain, Marbella
Quirónsalud Marbella

Dr Sanchez Yague

Gastroenterologist
26 years of experience

In 2007 he joined the Costa del Sol Hospital and left this position when he obtained an international scholarship that would take him back to San Francisco. In 2010 he moved to Japan to complete his training in the submucosal endoscopic dissection technique that he would later on introduce in Andalusia in 2011, thus becoming one of the pioneers in the performance of this technique in Spain. In 2011 he became the first medical professional in the world to use the 15-mm AXIOS stent in pancreatic fluid collection drainage. In 2018 he began to perform gastroenteroanastomosis with luminal apposition stent in patients with pancreatic cancer and bowel obstruction, thus becoming a pioneer in Andalusia to perform such technique.

He is a coauthor of the reference guides of the European Society of Gastrointestinal Endoscopy on the endoscopic treatment of chronic pancreatitis and non-variceal gastrointestinal haemorrhage.

Professional Experience

Over 24 years' experience

1999 - Degree in Medicine and Surgery. Malaga University, Spain.

2003 to 2006 - Medical Residency in the Digestive System at the Virgen Macarena Hospital in Seville, Spain.

2006 - International Scholar at the California Pacific Medical Center in San Francisco, USA.

2007 – Digestive System Specialist at the Costa del Sol Hospital, Marbella. Spain.

2008 - California Pacific Medical Center in San Francisco, USA.

2009 - Top Reviewer Award received from the Gastrointestinal Endoscopy Journal.

2011 – Pioneer in Spain in the introduction of the submucosal endoscopic dissection technique.

2011 – First professional in the world to use the AXIOS (15mm) stent for pancreatic fluid collection drainage.

2016 - Gold Medal of the Andalusian Society for Digestive Disease (SAPD, in its Spanish abbreviation).

2017 - Fellow of the American College of Gastroenterology (FACG).

2018 - Pioneer in Andalusia to perform gastroenteroanastomosis with luminal apposition stent to treat bowel obstruction.

2019 - Fellow of the American Society for Gastrointestinal Endoscopy (FASGE).

 

The Digestive System Unit of the Quirónsalud Marbella Hospital offers a patient service portfolio that includes all the clinical aspects of gastroenterology, hepatology, biliary duct and pancreatic disease, as well as the diagnostic and treatment techniques used in this speciality such as abdominal ultrasound, endoscopy and other functional tests.

Our specialists have solid professional backgrounds and the team is highly qualified for the diagnosis and treatment of complex diseases such as conditions related to acidity (gastric ulcers, helicobacter pylori, gastroesophageal reflux disease), enteropathies (Crohn's Disease, ulcerative colitis; coeliac disease...), viral hepatitis, hepatic cirrhosis, pancreatic disease...

The Digestive System Unit of the Quirónsalud Marbella Hospital is a pioneer in the implementation of a specific check-up programme for digestive disease with special attention to the diagnosis and treatment of colon precancerous lesions.

Diseases, treatments and techniques:

• Diagnostic and therapeutic endoscopic ultrasound

• Endoscopic resection techniques (mucosectomy/submucosal dissection)

• Submucosal or third-space endoscopy (POEM and variants)

• Bariatric endoscopy (Apollo Method)

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Hanifi Onalan
Hanifi Onalan
Surgical oncologist
26 years of experience
5.0
1 review
Turkey, Istanbul
Atlas University Medicine Hospital

Hanifi Onalan

Surgical oncologist
26 years of experience

Gallbladder and bile duct surgery

Breast disease treatment and surgery

Anal region disease treatment and surgery (hemorrhoids, anal fissure, perianal abscess and fistula surgery)

Obesity treatment (Gastric balloon, botox and surgical treatment)

Thyroid diseases and surgical treatment

Hernia surgery (open and laparoscopic) (groin, umbilical, wound hernias)

Colon, rectum, stomach diseases and surgical treatment

Endoscopic diagnosis and treatment interventions (gastroscopy, colonoscopy, ercp, peg)

 

2009- Atlas University Medicine Hospital

2004-2009 Tosya State Hospital

1994-2004 Taksim Education and Research Hospital

 

1999-2004 Taksim Education and Research Hospital General Surgery Clinic

1992-1998 Istanbul University Istanbul Faculty of Medicine

 

Courses and Conferences

Bakırkoy Dr. Sadi Konuk Education and Research Hospital General Surgery Clinic Endoscopy Unit Videoendoscopy Application Certificate (March 2006)

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Xavier Centeno Fornies
Xavier Centeno Fornies
Colorectal surgeon
31 years of experience
4.7
410 reviews
Spain, Barcelona
Centro Médico Teknon

Xavier Centeno Fornies

Colorectal surgeon
31 years of experience

Dr. Javier Centeno obtained his Doctorate in Medicine and Surgery from the University of Barcelona in 1988 and completed his specialization in General and Gastrointestinal Surgery at the Hospital de Mutua de Terrassa between 1989 and 1993.

Afterwards, Dr. Centeno completed additional training in the colorectal surgery department at the Mayo Clinic de Rochester, Minnesota (USA). Since 1993, Dr. Centeno has been a leading specialist in the surgery department at the Teknon Medical Center.

Clinical and scientific work:

Co-organizer of the Seminar on Endorectal Ultrasound Diagnostics. Advances in Colon, Rectum and Anus Surgery. Barcelona. March 1995.

"Visiting Surgeon" in the Department of Colorectal Surgery, Cleveland Clinic Florida, Fort Lauderdale, Florida, USA, February 1996.

Advanced Course in Laparoscopic Colorectal Surgery. ICARD. EITS, Strasbourg. November 2002.

Postgraduate student, associate professor of the Department of Urogynecoproctological Physiotherapy.

School of Nursing and Physiotherapy, University of Blanquerna. Ramon Llull University. Barcelona. 2003 2015

Accreditation by ERAS-Society (Sweden) in 2016.

Member of scientific communities:

Asociación Española de Cirujanos

· Societat Catalana de Cirurgia

· American Society of Colon and Rectal Surgeons y de la University of Minnesota Alumni Association.

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Erdem Akbal
Erdem Akbal
Gastroenterologist
22 years of experience
Turkey, Istanbul
Erdem Akbal

Erdem Akbal

Gastroenterologist
22 years of experience

Prof. Dr. Erdem Akbal was born in 1978 in Kırıkkale. In 2015, he received training at the Johns Hopkins Hospital Advanced Endoscopy Unit, focusing on Endoscopic Ultrasonography and advanced endoscopic procedures. In 2017, he trained at the Amsterdam Academic Medical Center in techniques such as endoscopic submucosal dissection, endoscopic mucosal resection, diffuse esophageal spasm, and endoscopic full-thickness resection for treating early-stage gastrointestinal system tumors. He also received training in high-resolution manometry and POEM (Peroral Endoscopic Myotomy) for diagnosing esophageal diseases like achalasia. In 2018, he furthered his education in ESD and Balloon Enteroscopy at Jichi University.

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Miquel Sans Cuffí
Miquel Sans Cuffí
Gastroenterologist
37 years of experience
4.7
410 reviews
Spain, Barcelona
Centro Médico Teknon

Miquel Sans Cuffí

Gastroenterologist
37 years of experience

A specialist in the digestive system through MIR from the Hospital Clinic of Barcelona and a Doctor of Medicine from the University of Barcelona, he received his PhD from the University of Barcelona.

He completed his postgraduate training in the Gastroenterology Service of the Barcelona Hospital Clinic and then in the Department of Gastroenterology at Case Western Reserve University (Cleveland, USA), where he conducted cutting-edge research on inflammatory bowel diseases (IBD, Crohn's disease and ulcerative colitis).

From 2004 to 2011 he worked in the Gastroenterology Department of the Barcelona Hospital Clinic / IDIBAPS, and since 2011 he has worked as a specialist doctor in the Digestive System Department of the Teknon Medical Center in Barcelona.

He was a member of the Scientific Committee of ECCO and coordinator of the European project "IBDChip". He is the author of more than 150 publications and 500 presentations at conferences and conferences.

Experience:

Digestive system specialist, completed the MIR training program and completed his residency in this specialty at the Provincial Hospital of Barcelona between 1993 and 1996.

Doctor of Medicine from the University of Barcelona with the qualification "Distinguished Diploma Unanimously". In 2001 he received the Distinguished Doctorate from the University of Barcelona.

Between 1997 and 1999, he completed his postgraduate training in the Gastroenterology Department of the Provincial Hospital of Barcelona. Subsequently, he completed two internships in the Gastroenterology Department of Case Western Reserve University in Cleveland, USA, between 2000 and 2003, where he conducted cutting-edge research in the field of gastroenterology.

Since 2004 he has been working in the Gastroenterology Service of the Provincial Hospital of Barcelona / IDIBAPS, focusing on the treatment and research of inflammatory bowel diseases.

He is the author of numerous publications, conference papers and book chapters both nationally and internationally.

Member of the Catalan Society of Gastroenterology, the Spanish Association of Gastroenterology, the Spanish Working Group on Crohn's Disease and Ulcerative Colitis and the American Gastroenterological Association.

Areas of special interest: storage rhythm disorders, chronic diarrhea, inflammatory bowel diseases (Crohn's disease and ulcerative colitis) and other causes of chronic intestinal inflammation.

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Ismail Ayman
Ismail Ayman
Gastrointestinal surgeon
20 years of experience
Italy, Bologna
Maria Cecilia Hospital

Ismail Ayman

Gastrointestinal surgeon
20 years of experience

Dr. Ayman is a Medical Doctor and Surgeon specializing in General and Bariatric Surgery, with extensive training and experience in minimally invasive surgery and obesity management.

Doctor earned his Master's Degree in Medicine and Surgery from the University of Brescia in 2005. He then completed his specialization in General Surgery at the same university in 2016, with a thesis titled "Fast track in minimally invasive colon surgery. He has complete autonomy in the clinical management of complex patients and extensive experience in performing a variety of surgical procedures, including major surgeries. His expertise includes gastric and colorectal surgery, bariatric surgery, abdominal wall surgery, videolaparoscopic (VLC) and laparotomic (VLA) procedures, and proctology. He is particularly skilled in performing medium and major surgeries in emergency settings.

Currently, he practices at Maria Cecilia Hospital in Bologna, where he evaluates the degree of obesity and associated conditions. Based on these assessments, he determines the most suitable surgical intervention, such as sleeve gastrectomy, gastric bypass, and mini laparoscopic bypass.

He has advanced training in colorectal and abdominal wall surgery from top institutions in Italy and Belgium.

He is an active member of the Italian Society of Obesity Surgery and Metabolic Disorders (S.I.C.OB.) and the International Federation for the Surgery of Obesity and Metabolic Disorders (IFSO), contributing to the advancement of bariatric surgery on an international level.

Dr. Ayman is distinguished by his dedication to patient care and his advanced skills in minimally invasive and bariatric surgery.

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Walter Querevalú
Walter Querevalú
General practitioner
35 years of experience

Walter Querevalú

General practitioner
35 years of experience
Mexico, Mexico City
DR. IRERI ASTEINZA Clinic
Edmundo Pichardo
Edmundo Pichardo
Plastic surgeon
38 years of experience

Edmundo Pichardo

Plastic surgeon
38 years of experience
Mexico, Mexico City
DR. IRERI ASTEINZA Clinic
Jan Kulawik
Jan Kulawik
General surgeon
31 years of experience
3.8
56 reviews
Poland, Jelenia Góra
KCM Clinic

Jan Kulawik

General surgeon
31 years of experience

Dr. Jan Kulawik, MD, PhD, is a member of the Bariatric and Laparoscopic Surgery Team. He is a bariatrician and general surgery specialist.

Jan Kulawik, M.D., assists with procedures in the field of:

Obesity surgery

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3.8
56 reviews
Doctor's visit price on request
Appendectomy $3527.66 - $3570.95
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Professor Burhan Mayir Md
Professor Burhan Mayir Md
Colorectal surgeon
25 years of experience
Turkey, Antalya
Prof. Dr. Burhan Mayir Scarless Sleeve Clinic

Professor Burhan Mayir Md

Colorectal surgeon
25 years of experience

Professor Burhan Mayir isespecially interested in metabolic and bariatric surgery, also. He performs single port (scarless) sleeve gastrectomy, gastric by pass procedures and revisional bariatric surgeries. He has experience about metabolic-bariatric surgery, gastro-esophagus reflux surgery, endoscopic thyroid surgery (scarless thyroidectomy), cancer surgery, hernia surgery, adrenal gland surgery, other gastrointestinal surgical procedures, liver surgery, spleen surgery, hemorrhoid surgery and anal fissure surgery. He has speeches in various congresses and meetings, over 60 articles published in national and international refereed journals, and over 100 abstracts presented at congresses.

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Doctor's visit price on request
Appendectomy $2488.84
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Alaettin Celik
Alaettin Celik
Pediatric surgeon
48 years of experience
5.0
32 reviews
Turkey, Istanbul
Istanbul Florence Nightingale Hospital

Alaettin Celik

Pediatric surgeon
48 years of experience

Prof. Dr. Alaettin Çelik graduated from Adapazarı İlyaslar Primary School in 1960, from Haydarpaşa High School in 1966, and from Istanbul University Faculty of Medicine in 1972. In the same year, he became an assistant in the 2nd Surgery Department of the Faculty of Medicine. Between November 1975 and February 1976, he completed his military service for 4 months at the Gelibolu Military Hospital as a Reserve Officer. In 1977, he became a General Surgery Specialist in the Department of Surgery.

To establish the pediatric surgery department at the faculty and to specialize further, he worked as a registrar at the University of London's "The Hospital for Sick Children" from 01.12.1978 to 01.12.1980. After returning to the faculty, he continued his pediatric surgery studies and became an associate professor in 1982.

In the same year, he was appointed as the founding chairman of the Pediatric Surgery Department at Istanbul Faculty of Medicine on 06.09.1982. He established the department, which included a 30-bed inpatient unit, an ICU, a polyclinic, and an operating room for students, assistants, and specialists. In 1988, he became a professor. In addition to leading the Pediatric Surgery Department, he served as the Vice President of the Department of Surgical Medical Sciences between 1990 and 1995. From 1995 to 1998, he was the Head of the Department of Surgical Medical Sciences at Istanbul Faculty of Medicine.

He is a specialist in General Surgery, Pediatric Surgery, and Pediatric Urology. He has numerous cited and published clinical and experimental research articles, case reports, expert theses, and free papers presented at domestic and international congresses. He is the author of several books, including Pediatric Surgery Book of Pediatric Surgery (2014), Newborn Surgery (2008), and Pediatric Surgery Book (2013).

He is a member of various professional medical associations, including the Turkish Ministry of Health Pediatric Surgery Society. He established, developed, and trained a large number of students, assistants, specialists, and faculty members at the Istanbul Faculty of Medicine, Department of Pediatric Surgery. He left the Department of Pediatric Surgery in 2013 and retired due to age limits on 16.03.2016. His contracted working period at the same faculty ended on 22.10.2016. He continues to work as a Pediatric Surgery Specialist at Istanbul Florence Nightingale Hospital and participates in weekly meetings of the Council of Children's Tumors.

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Pichai Kittipanyaworakul
Pichai Kittipanyaworakul
Gastroenterologist
14 years of experience
4.0
1 review
Thailand, Bangkok
Intrarat Hospital

Pichai Kittipanyaworakul

Gastroenterologist
14 years of experience

Pichai Kittipanyaworakul, M.D.
Pichai Kittipanyaworakul, M.D.

 

INTERNAL MEDICINE / GASTROENTEROLOGIST AND HEPATOLOGIST

 

Graduation (M.D. From)

Bachelor of Medicine, Faculty of Medicine, Chiang Mai University

 

Certificates

Diploma in Internal Medicine, Faculty of Medicine, Chulalongkorn Memorial Hospital, Thai Red Cross Society

Diploma of Internal Medicine in Gastroenterology and Hepatology, Faculty of Medicine, Ramathibodi Hospital, Mahidol University

 

Current Positions

INTERNAL MEDICINE / GASTROENTEROLOGIST AND HEPATOLOGIST AT INTRARAT HOSPITAL

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Viktor Alexander Krol
Viktor Alexander Krol
Gastroenterologist
25 years of experience
4.0
1 review
Germany, Dusseldorf
St. Martinus-Krankenhaus Düsseldorf

Viktor Alexander Krol

Gastroenterologist
25 years of experience

Dr. Victor Alexander Krol - Chief of Gastroenterology, Internal Medicine and Obesity Treatment Center at Martinus Hospital

Dr. Victor Alexander Krol is a highly qualified specialist, heading the departments of gastroenterology and internal medicine. With many years of experience and deep knowledge in his field, Dr. Krol has established himself as an outstanding expert, providing patients with comprehensive treatment and an individual approach. He actively uses the latest methods of diagnosis and treatment of diseases of the gastrointestinal tract, metabolism, as well as diseases of the cardiovascular and respiratory systems.

Dr. Krol is also the director of the certified Obesity Treatment Center at Martinus Hospital, which provides surgical and endoscopic treatments for obesity. The center uses advanced technology to diagnose and treat obesity (adiposis), including methods such as bariatric surgery, endoscopic weight loss, and specialized programs for patients with different stages of obesity. The center is certified to high standards and has excellent results in the treatment of this serious disease.

The Gastroenterology Department, headed by Dr. Krol, diagnoses and treats diseases of the stomach, intestines, liver, pancreas, and gallbladder. The doctors of the department use a wide range of methods, including endoscopic procedures, ultrasound, and other modern diagnostic technologies.

The Department of Internal Medicine covers a wide range of diseases, including cardiology, diabetology, infectology, and therapy of respiratory and renal diseases. Dr. Krol and his team provide a comprehensive approach to treatment using the most advanced methods of medicine.

Thanks to his high professionalism and humane approach to each patient, Dr. Krol deservedly enjoys the respect of colleagues and patients.

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Enrique Pliego Esquivel
Enrique Pliego Esquivel
Gastrointestinal surgeon
9 years of experience
Mexico, Cancún
Dr. Enrique Pliego Private Practice

Enrique Pliego Esquivel

Gastrointestinal surgeon
9 years of experience

I’m Dr. Enrique Pliego Esquivel, a surgeon specializing in bariatric and metabolic surgery with over 8 years of experience transforming lives through advanced surgical solutions. I am proud to be one of the few bariatric surgeons in Mexico who is a member of the American Society for Metabolic and Bariatric Surgery (ASMBS). I am also certified by the Mexican Board of Obesity Surgery and the Mexican College of General Surgery.

My primary focus is providing comprehensive care to patients dealing with obesity, obesity-related conditions such as diabetes and hypertension, as well as managing complications from bariatric surgery. I also treat gastroesophageal reflux and reflux-related esophagitis, offering tailored solutions that significantly enhance my patients' quality of life.

Patients often highlight my professionalism, empathy, and dedication to understanding their unique needs. I take the time to listen and fully grasp their goals because I believe every case deserves a personalized approach and a clear path toward success.

My priority isn’t to see the most patients—it’s to deliver exceptional care and outstanding results for each individual. I am deeply committed to quality, staying accessible, and maintaining close communication with my patients throughout their journey.

If you’re looking for expertise, compassion, and results you can trust, I’m here to help you take the first step toward a healthier, happier life.

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Doctor's visit price on request
Appendectomy $2900 - $5500
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Assoc Prof Dr Guner Cakmak
Assoc Prof Dr Guner Cakmak
General surgeon
28 years of experience
4.4
74 reviews
Turkey, Istanbul
Lokman Hekim Istanbul Hospital

Assoc Prof Dr Guner Cakmak

General surgeon
28 years of experience

 

Assoc. Prof. Dr. Güner ÇAKMAK is a highly skilled and experienced specialist in General Surgery, currently practicing at Lokman Hekim University İstanbul Hospital. With a medical degree earned from Haydarpaşa Numune Hospital in 1997, he has built an extensive career, focusing on various advanced surgical techniques. His areas of expertise include laparoscopic surgery, bariatric and metabolic surgery, hepatopancreatobiliary surgery, and various types of laparoscopic gastrointestinal surgeries, including those for hernias, reflux, and esophageal issues. He is also highly experienced in hemorrhoid surgery and surgeries for anal fistulas and fissures.

Throughout his career, Dr. Çakmak has made significant contributions to medical literature, having published over 43 articles in international peer-reviewed journals and 16 in national journals. He is also the author of 20 technical notes, case reports, and research articles. His commitment to advancing medical knowledge is reflected in the numerous awards he has received, with a total of 9 prizes recognizing his exceptional work in surgery. Fluent in Turkish, English, and German, Dr. Çakmak offers comprehensive care to his patients, employing the latest minimally invasive techniques to ensure the best outcomes.

At Lokman Hekim University İstanbul Hospital, he continues to provide expert care, focusing on complex surgeries, with an emphasis on laparoscopic and metabolic procedures. His work is marked by a dedication to patient well-being and continuous professional development, making him a trusted choice for individuals seeking high-quality surgical care in Turkey.

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Ullrich Graeven
Ullrich Graeven
Gastroenterologist
39 years of experience
Germany, Dusseldorf
Клинический комплекс "Мария Хильф"

Ullrich Graeven

Gastroenterologist
39 years of experience

Prof. Dr. med. Ulrich Graven

Head of the Clinic of Hematology, Oncology and Gastroenterology

Head of a certified oncology center

Head of Clinical Research Department

Specialization:

Hematology, including stem cell transplantation

Abdominal oncology, especially colorectal and pancreatic cancer therapy

Metastasis therapy, including the use of off-label drugs

Membership in professional societies:

Professional Union of German Therapists

German Society for Internal Medicine

German Cancer Society

Abdominal Oncology Working Group

German Society of Hematology and Oncology

German Working Group on Bone Marrow and Hematopoietic Cell Transplantation

German Society for Digestive and Metabolic Diseases

European Society for Medical Oncology

American Society of Clinical Oncology

American Association for Cancer Research

Activities in professional communities:

German Cancer Society:

Since 2013, speaker of the commission for certification of oncology centers

Since November 2007, member of the board

Since September 2022, Speaker of the Section of National Societies on Cancer Control

Chairman of the working group on abdominal oncology of the German Cancer Society, drafting clinical guidelines for the treatment of colorectal and pancreatic cancer.

Chairman of the Oncology Society of North Rhine-Westphalia.

Member of the Colorectal Cancer Clinical Guidelines Working Group, European Society for Medical Oncology.

Member of the Scientific Council, National Cancer Registry at the Robert Koch Institute.

Chairman of the Regional Cancer Registry of the State of North Rhine-Westphalia.

Leading expert for clinical research, German Research Foundation and Federal Ministry of Research and Technology.

Member of the Commission on the Use of Medicines for Therapy "Off-Label", Federal Institute of Medicines and Medical Devices.

Member of the committee for the development of clinical guidelines for colorectal cancer.

Member of the commission on the development of approaches to metastasis and the use of palliative therapy in clinical guidelines for colorectal cancer.

Reviewer of scientific journals such as Journal of Cancer Research and Clinical Oncology, Tumor Diagnostik und Therapie, Der Schmerz, BMC Pharmacology, Onkologie, Strahlentherapie und Onkologie, International Journal of Colorectal Disease, Annuals of Oncology, European Journal of Cancer.

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Osman Aktas
Osman Aktas
Gastrointestinal surgeon
33 years of experience
Turkey, Istanbul
Avicenna International Hospital

Osman Aktas

Gastrointestinal surgeon
33 years of experience

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.

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Doctor's visit price on request
Appendectomy $2705.26
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This page may feature information relating to various medical conditions, treatments, and healthcare services available in different countries. Please be advised that the content is provided for informational purposes only and should not be construed as medical advice or guidance. Please consult with your doctor or a qualified medical professional before starting or changing medical treatment.

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