Ureteropelvic junction

The ureteropelvic junction (UPJ, also uretero-pelvic junction or ureteral pelvic junction) is the junction between the ureter and the renal pelvis of the kidney.

During the embryologic development of the kidney, this is the last part of the ureter to become patent.

Failure of this segment of ureter to become patent during development is the most frequent cause of bilateral hydronephrosis, particularly in male neonates. Pyeloplasty, which involves excision of the stenotic section and creation of a new junction, is the most common and effective treatment for this problem.

Anatomy of the urinary system

Kidneys

Layers

Circulation

Arteries
Veins

Nephron

Renal corpuscle	Glomerulus Bowman's capsule Glomerular basement membrane Podocyte Filtration slits Mesangium Intraglomerular mesangial cell

Renal tubule	Proximal convoluted tubule Loop of Henle Descending Thin ascending Thick ascending Distal convoluted tubule Connecting tubule Collecting ducts Tubular fluid Renal papilla Minor calyx Major calyx Renal pelvis

Juxtaglomerular apparatus	Macula densa Juxtaglomerular cells Mesangium Extraglomerular mesangial cell

Ureters

Bladder

Urethra

This article is issued from Wikipedia - version of the Tuesday, March 15, 2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.