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Prof. Dr. Hasan Erdem image

Department of metabolic and bariatric (weight loss) surgery

Prof. Dr. Hasan Erdem
general surgery, bariatric surgery

About the department

The department of metabolic and bariatric (weight loss) surgery at Dr. HE Obesity Clinic Istanbul provides world-class care for obese patients. The department's medical staff has extensive experience in metabolic surgery and adheres to an individual approach to treating patients. After a thorough diagnosis, the department's surgeons analyze the patient's condition and suggest the appropriate type of surgery that best suits the patient. The department has modern diagnostic and treatment equipment and a hospitable and friendly atmosphere. In addition, the department operates a 24-hour obesity hotline if an urgent consultation is needed. First, doctors apply conservative treatment methods, especially drug therapy, diet therapy and lifestyle changes.

Treatments available at the department include gastric balloon surgery, gastric bypass surgery, gastric tube surgery, and non-surgical weight loss. Doctors offer the surgical treatment of diabetes mellitus using transit bilobed surgery. This surgery provides people with an improved quality of life by reducing long-term health problems associated with diabetes and obesity. Non-surgical weight loss involves the application of Botox to the fundus of the stomach through an endoscopic needle. The procedure is performed under light anaesthesia, and the patient does not feel pain.

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Treatment and diagnostic focus of the department

Causes of the obesity: 

  • Genetic predisposition 
  • Diabetes mellitus 
  • Physical inactivity 
  • Overeating
  • Frequency of eating
  • Medications (antidepressants) 
  • Psychological factors 
  • Hypothyroidism 
  • Insulin resistance 
  • Polycystic ovary syndrome 
  • Cushing's syndrome 
  • Prader-Willi syndrome 
  • Social issues


  • Anamnesis 
  • Physical examination 
  • Body mass index 
  • Ultrasound scanning 
  • Computed tomography (CT scan) 
  • Magnetic resonance imaging (MRI) 
  • Endoscopic procedures (gastroscopy) 
  • Lipid profile 
  • Hormone panel 
  • Kidney and liver function tests 
  • Glucose tolerance test 
  • Electrocardiography (ECG) 
  • Measures of the blood pressure 


  • Drug therapy 
  • Physical therapy 
  • Cognitive-behavioural therapy 
  • Diet therapy 
  • Physiotherapy 
  • Sleeve surgery on the stomach
  • Laparoscopic adjustable gastric banding (LAGB)
  • Gastric bypass
  • Mini gastric bypass
  • Gastric balloon surgery
  • Gastric Botox
  • Ellipse balloon
  • Surgical treatment of type 2 diabetes
  • Other treatment options 
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Doctor profile


  • 1996 - 2002 Medical education at the Istanbul Medical School of Istanbul University
  • 2008 Specialization in General Surgery at Bezmialem Vakıf Gureba Teaching Hospital in Istanbul


  • 2003 - 2008 Assistant Doctor, İstanbul Bezmialem Valide Sultan Vakıf Gureba Training and Research Hospital
  • 2009 - 2011 Government Hospital
  • 2010 - 2011 General Surgery Specialist at Elbistan State Hospital General Surgery Clinic
  • 2011 - 2016 Chief assistant in General Surgery at the Adana Training and Research Hospital General Surgery Clinic
  • 2016 Bariatric Surgeon at Dr. HE Obesity Clinic, İstanbul

Awards, memberships, publications

  • 2018 Granted the title Associate Professor of Obesity and Metabolic Conditions
  • International Federation for the Surgery of Obesity and Metabolic Disorders
  • Turkish Surgical Association
  • Endoscopic and Laparoscopic Surgery Association
  • Endocrine Surgery Association
  • Turkish Society of Colon and Rectal Surgery
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