Meet Our Expert Team
At the heart of our practice is a dedicated team of highly skilled professionals, led by our renowned primary surgeon, Professor Ibrahim Dagher. With years of experience and a commitment to innovative, patient-centered care, our team is devoted to achieving the best possible outcomes for each patient we treat.

Beyond his clinical practice, Professor Dagher is an active researcher and educator. He directs two university diplomas:
- Advanced Laparoscopy (Inter-University Diploma)
- Minimally Invasive Surgery (University Diploma)
A leader in innovation and excellence, Professor Dagher's mission is to continually improve patient care through pioneering techniques and an unwavering commitment to quality.
Professor
Ibrahim Dagher
Surgeon, Researcher, and Pioneer in Minimally Invasive Surgery
Professor Ibrahim Dagher is a globally recognized surgeon and a professor at the Faculty of Medicine Paris-Sud. With over [X years] of experience, he specializes in bariatric, hepatobiliary, and oncological surgery, with a particular focus on minimally invasive techniques.
Currently serving as the Head of the Department of Minimally Invasive Digestive Surgery at Antoine Béclère Hospital in Paris, Professor Dagher leads a multidisciplinary team committed to providing cutting-edge, personalized care. His expertise spans three key areas:
- Bariatric Surgery:
A pioneer in single-port laparoscopic techniques and fast-track recovery protocols, Professor Dagher has revolutionized patient outcomes in the field. - Hepato-Pancreato-Biliary (HPB) Surgery:
Specializing in liver and pancreatic cancers, he is internationally renowned for advancing laparoscopic liver and pancreatic surgeries. - Minimally Invasive Techniques:
He has developed groundbreaking methods, such as single-port sleeve gastrectomy and micro-laparoscopy for gallbladder and abdominal hernia treatments.

Our Expert Team of Specialists
Alongside Professor Dagher, our team of experienced surgeons, nurses, and support staff is dedicated to providing the highest standard of care. Each team member is highly trained and continuously updates their skills to stay at the forefront of medical advancements. soins d’excellence à chaque patient. Chaque membre est hautement qualifié et suit une formation continue pour rester à la pointe des avancées médicales.
From Professor Hadrien Tranchart, an expert in mininvasive surgery, to Dr. Joseph Derienne, we work together seamlessly to deliver personalized, compassionate care to every patient.

Niaz Devaquet
She is a hospital practitioner specialized in robotic bariatric surgery, colorectal surgery, and abdominal wall surgery. Her work focuses on the multidisciplinary and minimally invasive management of digestive and metabolic diseases, with a particular interest in advanced surgical techniques.
Her areas of expertise include:
- Bariatric surgery (sleeve gastrectomy, gastric bypass) with robotic assistance
- Minimally invasive colorectal surgery for benign and malignant diseases of the colon and rectum
- Abdominal wall surgery (inguinal hernia, umbilical hernia, incisional hernia) using laparoscopic or robotic techniques
- Minimally invasive approaches (laparoscopy, single-incision surgery, robotic-assisted surgery)

Joseph Derienne
He is a Hospital Practitioner specialized in bariatric, minimally invasive, and robotic surgery. His practice focuses on advanced surgical techniques applied to the treatment of obesity and related metabolic conditions.
His areas of expertise:
- Bariatric surgery
- Minimally invasive surgery (laparoscopy, single-incision, mini-laparoscopy)
- Robotic-assisted surgery

Professor Hadrien Tranchart
He is a Professor at the University of Paris-Saclay and a Hospital Practitioner at Antoine Béclère Hospital. He is recognized for his expertise in minimally invasive digestive surgery, including laparoscopy, single-incision techniques, mini-laparoscopy, and robotic surgery. His approach combines innovation and precision, applied across multiple key areas:
Obesity and metabolic surgery
Abdominal wall reconstruction and hernia repair
Digestive oncology surgery
Emergency management of acute digestive conditions
Why Choose Us
Unmatched Expertise
With years of specialized experience in bariatric and hepatobiliary surgery, our team is equipped to manage even the most complex cases.As one of the top-ranking bariatric centers in France, we bring an extensive surgical volume and refined expertise that translate into safer procedures and better outcomes.
Qualified Staff
Our highly trained, dedicated professionals are committed to delivering compassionate and expert care. From surgeons to nursing staff, every team member is certified and experienced, ensuring you receive the highest standard of care at every stage of your journey.
Patient-Centered Care
We place your needs and well-being at the heart of everything we do. Our patient-centered approach ensures that your treatment plan is tailored to your unique health goals. We take the time to listen, support, and guide you — every step of the way.
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Address
Hôpital Antoine-Béclère 157, rue de la Porte de Trivaux 92140 Clamart
Call Us
Hospital secretaries: 6:45 - 17:00, Monday to Friday. Tel.: +33 1 45 37 43 39 | +33 1 45 37 43 48 | +33 1 45 37 43/47
Call Us
Medical secretaries: 8:30 - 17:00, Monday to Friday. Tel.: +33 1 45 37 43 39 | +33 1 45 37 43 48
Email Us
Cécile.huber@aphp.fr
Ibrahim.dagher@aphp.fr