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Prof. Dr. Abdurrahman Onen image

Department of pediatric urology

Prof. Dr. Abdurrahman Onen
pediatric urology

About the department

The department of pediatric urology at Memorial Sisli Hospital Istanbul is one of Turkey's leading centres for diagnosing and treating diseases of the genitourinary system in children. The department's specialists mainly accept patients with congenital urological pathologies for treatment. The department has modern technical equipment for minimally invasive, endoscopic and robotic interventions, characterized by minimal trauma and performed through several small incisions. Thanks to such innovative techniques, the period of postoperative recovery of the child is significantly reduced, and a pronounced pain syndrome is also excluded. Furthermore, the department doctors get along well with children and do their best to make little patients comfortable without fearing the upcoming treatment.

Doctors prefer conservative treatment methods as first-line therapy. Usually, urinary tract infections, nocturnal enuresis, and urolithiasis do not require surgical intervention. Doctors mainly use drugs, advanced stone crushing systems, and other conservative methods with these pathologies. Surgery is the most common treatment for identifying hypospadias, cryptorchidism, undescended testis, or genitourinary malformations. Surgical interventions are often performed on an outpatient basis, and young patients do not need hospitalization.

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Treatment and diagnostic focus of the department


  • Urinary tract infections
  • Hypospadias
  • Hydrocele
  • Cryptorchidism (undescended testicle)
  • Malignant diseases of the urinary tract 
  • Varicocele
  • Vesicoureteral reflux
  • Urolithiasis disease
  • Obstruction of the urinary tract
  • Enuresis
  • Bladder exstrophy
  • Epispadias


  • History of the disease
  • Clinical examination 
  • Hormone panel 
  • Measures of the blood pressure 
  • Ultrasound examination 
  • Doppler and duplex sonography 
  • Pyelography (an intravenous pyelogram (an X-ray exam of the urinary tract)
  • Cystoscopy (to look inside the bladder using a thin camera)
  • Computed tomography (CT scan) 
  • Magnetic resonance imaging (MRI) 
  • Laboratory tests (blood, urine) 
  • Kidney function analysis (glomerular filtration rate and albumin to creatinine ratio)


  • Pharmaceutical therapy 
  • Biofeedback therapy
  • Botox treatments
  • HIFU treatment
  • Neuromodulation
  • Laser lithotripsy
  • Shock wave lithotripsy
  • Circumcision
  • Hypospadias repair
  • Endoscopic management of stricture
  • Minimally invasive procedures 
  • Laparoscopic surgery 
  • Open surgery
  • Physiotherapy 
  • Other treatment services
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Doctor profile


  • 1996 Highly specialized training in Pediatric Surgery, Cerrahpaşa Faculty of Medicine, Istanbul University, Istanbul, Turkey
  • 1992 - 1997 Specialized training in Pediatric Surgery, Faculty of Medicine, Dicle University, Diyarbakir, Turkey
  • 1985 - 1991 Study of Human Medicine at the Faculty of Medicine of Istanbul University, Istanbul, Turkey


  • Since 2015 Chief Physician of the Department of Pediatric Urology at the Memorial Sisli Hospital Istanbul, Istanbul, Turkey
  • 2011 - 2018 Pediatric Urology Specialist, Department of Pediatric Urology, Memorial Diyarbakir Hospital, Diyarbakir, Turkey
  • 2007 Pediatric Urology Specialist, Pittsburgh Children's Hospital, USA
  • 2007 - 2011 Specialist in Pediatric Surgery and Pediatric Urology, Hospital at Dicle University, Diyarbakir, Turkey
  • 2005 Pediatric Urology Specialist, the University of Groningen, the Netherlands
  • 2000 - 2007 Specialist in Pediatric Surgery and Pediatric Urology, Hospital at Dicle University, Diyarbakir, Turkey
  • 1999 - 2000 Pediatric Urology Specialist, Children's Hospital in Columbus, USA
  • 1997 - 1999 Pediatric Surgery Specialist, Hospital at Dicle University, Diyarbakir, Turkey
  • 1991 - 1992 Practitioner, Gerede Macarlar Health Unit, Bolu, Turkey

Awards, memberships, publications

  • European Society for Paediatric Urology (ESPU)
  • 2000 American Academy of Pediatrics (AAP) Section of Pediatric Urology
  • 2005 Society for Fetal Urology (SFU)
  • 1996 Turkish Society of Pediatric Surgery
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