What is Extrarenal pelvis of kidney?
An extrarenal pelvis is a normal anatomical variant that is predominantly outside the renal sinus and is larger and more distensible than an intrarenal pelvis that is surrounded by sinus fat.
How can you tell the difference between hydronephrosis and extrarenal pelvis?
On a sonogram, extrarenal pelvis appears as a hypoechoic or anechoic mass just outside the renal sinus and unlike hydronephrosis, it is not associated with dilated calyces, parenchymal thinning, hydroureter, or enlarged kidney per se.
What causes an extra renal pelvis?
Hydronephrosis occurs when there is either a blockage of the outflow of urine, or reverse flow of urine already in the bladder (called reflux) that can cause the renal pelvis to become enlarged. Hydronephrosis may or may not cause symptoms.
What are bilateral Extrarenal Pelves?
Bilateral extrarenal calyces, which are characterized by calyces and renal pelvis that lie outside the renal parenchyma, associated with variations of renal vessels is one of the rare anomalies of the collecting system.
What is renal pelvis?
Listen to pronunciation. (REE-nul PEL-vus) The area at the center of the kidney. Urine collects here and is funneled into the ureter, the tube that connects the kidney to the bladder.
What is Pelvicaliectasis of the kidney?
Pelvicaliectasis is a term used to describe a dilated renal pelvis and calyces. It is not synonymous with the word hydronephrosis. Hydronephrosis is a term used to describe a dilated renal pelvis and calyces that are specifically caused by an obstructive process.
Is Extrarenal pelvis harmful?
This bulging out of the kidney pelvis beyond the hilum is called extra renal pelvis. It does not cause any harm…. The problem is that extra renal pelvis can be confused at many times and might appear like an obstruction in the passage of urine due to a stone in the ureter.
Is the renal pelvis the same as the extrarenal pelvis?
A: Extrarenal pelvis is a variant of normal renal pelvis, a chamber where all urine forming ducts meet before transmitting the formed urine via a long tube, ureter, to the urinary bladder. Normally, the renal pelvis is surrounded by kidney substance and fat, and hardly has any capacity.
Is there such a thing as bilateral extrarenal calyces?
Bilateral extrarenal calyces, which are characterized by calyces and renal pelvis that lie outside the renal parenchyma, associated with variations of renal vessels is one of the rare anomalies of the collecting system.
When to use a CT for an extrarenal pelvis?
An extrarenal pelvis usually appears dilated, erroneously suggesting obstructive pathology. Subsequent investigation with CT usually clarifies a false interpretation on ultrasound. After evaluation with ultrasound and/or CT/MRI, if there is still confusion about whether a dilated renal pelvis is obstructed or not, renal scintigraphy can clarify
Is the renal pelvis part of the sinus?
There is considerable variation in the number of renal calyces and the shape of the renal pelvis, but there is also a marked variation in the position of the pelvis. Thus a pelvis may lie almost entirely within the sinus, an intrarenal pelvis, or its main portion may be a dilated sac and lie outside the kidney proper, an extrarenal pelvis [1].