Congenital Ureteropelvic Junction Obstruction

  • Michela Maffi
  • Mario LimaEmail author


Primitive or congenital hydronephrosis is a dilation of renal pelvis and intrarenal calyces mostly due to an abnormality of the ureteropelvic junction (UPJ), which results in an inadequate drainage of urine from the pelvis into the ureter. Increased intrapelvic pressure and urinary stasis in the collecting ducts cause progressive damage to the kidney.


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© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.Department of Pediatric SurgeryS.Orsola Hospital, Bologna UniversityBolognaItaly

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