Extrarenal pelvis
Updates to Article Attributes
Body
was changed:
Extrarenal pelvis refers to the presence of the renal pelvis outside the confines of the renal hilum. It is a normal variant that is found in ~10% of the population 2.
The renal pelvis is formed by all the major calyces.
Ultrasound
An extarenal pelvis usually appears dilated giving a false indication of an, erroneously suggesting obstructive pathology. Subsequent investigation with CT, usually clarifies thea false interpretation on ultrasound.
Radiographic features
CT
- a normal extrarenal pelvis will demonstrate normal renal cortical thickness, bilateral symmetrical contrast excretion and normal appearing calyces 3
DifferenitalDifferential diagnosis
-
more distensible than anintrarenal (renal) pelvisand thus may be confused for proximalhydroureteror - PUJ obstruction
Practical points
After evaluation with ultrasound and/or CT, if there is still confusion whether a dilated renal pelvis is obstructed or not, renal scintigraphy can be pursued
-<p><strong>Extrarenal pelvis</strong> refers to the presence of the renal pelvis outside the confines of the <a href="/articles/renal-hilum">renal hilum</a>. It is a normal variant that is found in ~10% of the population <sup>2</sup>. </p><p>The <a href="/articles/renal-pelvis">renal pelvis</a> is formed by all the major calyces. An extarenal pelvis usually appears dilated giving a false indication of an obstructive pathology. Subsequent investigation with CT, usually clarifies the false interpretation on ultrasound.</p><h4>Radiographic features</h4><h5>CT</h5><ul><li>a normal extrarenal pelvis will demonstrate normal renal cortical thickness, bilateral symmetrical contrast excretion and normal appearing calyces <sup>3</sup>-</li></ul><h4>Differenital diagnosis</h4><ul><li>more distensible than an <strong>intrarenal (renal) pelvis</strong> and thus may be confused for proximal <a href="/articles/hydroureter">hydroureter</a> or <a href="/articles/pelvi-ureteric-junction-obstruction-1">PUJ obstruction</a>-</li></ul>- +<p><strong>Extrarenal pelvis</strong> refers to the presence of the renal pelvis outside the confines of the <a href="/articles/renal-hilum">renal hilum</a>. It is a normal variant that is found in ~10% of the population <sup>2</sup>. </p><p><strong>Radiographic features</strong></p><h5>Ultrasound</h5><p>An extarenal pelvis usually appears dilated, erroneously suggesting obstructive pathology. Subsequent investigation with CT usually clarifies a false interpretation on ultrasound.</p><p><strong>CT</strong></p><ul><li>a normal extrarenal pelvis will demonstrate normal renal cortical thickness, bilateral symmetrical contrast excretion and normal appearing calyces <sup>3</sup>
- +</li></ul><h4>Differential diagnosis</h4><ul>
- +<li>
- +<a href="/articles/hydronephrosis">hydronephrosis</a>, from whatever cause</li>
- +<li><a href="/articles/pelvi-ureteric-junction-obstruction-1">PUJ obstruction</a></li>
- +</ul><h4>Practical points</h4><p>After evaluation with ultrasound and/or CT, if there is still confusion whether a dilated renal pelvis is obstructed or not, <a href="/articles/renal-scintigraphy">renal scintigraphy</a> can be pursued</p>
Unable to process the form. Check for errors and try again.