From Embryology

Hydronephrosis.jpg(600 × 345 pixels, file size: 64 KB, MIME type: image/jpeg)


Hydronephrosis is the swelling of a kidney due to a backup of urine. There are several different causes of the condition in both development and adult renal function.

  • The most common type of obstruction is at the ureteropelvic junction (UPJ), between the junction of the ureter and the kidney.
  • Blockage lower as the ureter enters the bladder, the ureterovesicular junction (UVJ), usually involves only one kidney and the back flow enlarges the affected ureter.

Links: Renal System - Abnormalities | Renal System Development

Cite this page: Hill, M.A. (2024, June 12) Embryology Hydronephrosis.jpg. Retrieved from

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© Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G

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