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Duplicated ureter or duplex collecting system is a congenital condition in which the ureteric bud, the embryological origin of the ureter, splits (or arises twice), resulting in two ureters draining a single kidney. It is the most common renal abnormality, occurring in approximately 1% of the population.
Duplex-system ureterocele: treatment options vary with the individual and include: endoscopic incision of the corresponding ureteric orifice in case of ureteric meatal stricture; upper pole nephrectomy for a poorly functioning unit with ureterectomy or, where there is useful renal function, ureteropyelostomy.
Duplex kidneys, or double kidneys, occur in approximately 1% of the population. This occurrence normally causes no complications, but can occasionally cause urinary tract infections. [40] [41] Duplicated ureter occurs in approximately one in 100 live births; Horseshoe kidney occurs in approximately one in 400 live births
The drooping lily sign is a radiological finding observed on imaging studies of the kidneys, most commonly associated with duplex collecting system and obstruction of the upper moiety. [1] This sign is characterized by the appearance of a compressed, non-obstructed lower renal moiety, which takes on a "drooping" or displaced appearance due to ...
Multicystic dysplastic kidney (MCDK) is a condition that results from the malformation of the kidney during fetal development. The kidney consists of irregular cysts of varying sizes. Multicystic dysplastic kidney is a common type of renal cystic disease, and it is a cause of an abdominal mass in infants. [5]
A supernumerary kidney is an additional kidney to the number usually present in an organism. This often develops as the result of splitting of the nephrogenic blastema, or from separate metanephric blastemas into which partially or completely reduplicated ureteral stalks enter to form separate capsulated kidneys; in some cases the separation of the reduplicated organ is incomplete (fused ...
Ectopic ureter (or ureteral ectopia) is a medical condition where the ureter, rather than terminating at the urinary bladder, terminates at a different site. [1] [2] In males this site is usually the urethra, in females this is usually the urethra or vagina. [3]
The collecting duct system is the final component of the kidney to influence the body's electrolyte and fluid balance. In humans, the system accounts for 4–5% of the kidney's reabsorption of sodium and 5% of the kidney's reabsorption of water. At times of extreme dehydration, over 24% of the filtered water may be reabsorbed in the collecting ...