Rim sign (chronic hydronephrosis)
Updates to Article Attributes
Body
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The rim sign can be seen in association with chronic hydronephrosis.
In patient's with chronic hydronephrosis, in all forms of contrast contrast-enhanced imaging of the obstructed kidney, enhancement may occur in the residual, but markedly atrophic, renal parenchyma parenchyma, surrounding the dilated calices and renal renal pelvis.1-2
The inner margin of this hydronephrotic rim is concave toward the renal hilum, and enhancement enhancement of the cortical columns between the dilated dilated collecting system elements may be seen. The unopacified urine within the dilated system may act as a negative pyelogram.
See also
Other rim signs in radiology
- cortical rim sign - useful in distinguishing lobar nephronia from a segmental renal infarct
- soft tissue rim sign - used to distinguish a ureteric calculus from a phlebolith
- bright rim sign - described in DNETs
- rim sign (of AVN)
-<p>The <strong>rim sign</strong> can be seen in association with <a href="/articles/chronic-hydronephrosis" title="chronic hydronephrosis">chronic hydronephrosis</a>. </p><p>In patient's with <strong style="font-family: Helvetica, Arial, sans-serif;">chronic hydronephrosis,</strong> in all forms of contrast-enhanced imaging of the obstructed kidney, enhancement may occur in the residual, but markedly atrophic, renal parenchyma, surrounding the dilated calices and renal pelvis.<sup>1-2</sup></p><p>The inner margin of this hydronephrotic rim is concave toward the renal hilum, and enhancement of the cortical columns between the dilated collecting system elements may be seen. The unopacified urine within the dilated system may act as a <strong style="font-family: arial; font-size: 13px; line-height: 19px;">negative pyelogram</strong>.</p><h4><strong>See also </strong></h4><p><strong>Other rim signs in radiology</strong></p><ul>-<li>-<a href="/articles/cortical-rim-sign" title="Cortical rim sign">cortical rim sign</a> - useful in distinguishing <a href="/articles/lobar-nephronia" title="lobar nephronia" style="color: rgb(45, 83, 154); font-family: Helvetica, Arial, sans-serif;">lobar nephronia</a> from a segmental <a href="/articles/renal-infarct" title="renal infarct" style="font-family: Helvetica, Arial, sans-serif;">renal infarct</a>-</li>-<li>-<a href="/articles/soft-tissue-rim-sign" title="Soft tissue rim sign">soft tissue rim sign</a> - used to distinguish a <a href="/articles/urolithiasis" title="Ureteric calculus" style="font-family: Helvetica, Arial, sans-serif;">ureteric calculus</a> from a <a href="/articles/phlebolith" title="phlebolith" style="color: rgb(45, 83, 154); font-family: Helvetica, Arial, sans-serif;">phlebolith</a>-</li>-<li>-<a href="/articles/bright-rim-sign-in-dnets" title="Bright rim sign">bright rim sign</a> - described in <a href="/cases/dysembryoplastic-neuroepithelial-tumour-dnet-6" style="font-family: Helvetica, Arial, sans-serif;">DNETs</a>-</li>-<li><a href="/articles/rim-sign-of-avn-1" title="Rim sign (of AVN)">rim sign (of AVN)</a></li>- +<p>The <strong>rim sign</strong> can be seen in association with <a href="/articles/chronic-hydronephrosis">chronic hydronephrosis</a>. </p><p>In patient's with <strong>chronic hydronephrosis,</strong> in all forms of contrast-enhanced imaging of the obstructed kidney, enhancement may occur in the residual, but markedly atrophic, renal parenchyma, surrounding the dilated calices and renal pelvis.<sup>1-2</sup></p><p>The inner margin of this hydronephrotic rim is concave toward the renal hilum, and enhancement of the cortical columns between the dilated collecting system elements may be seen. The unopacified urine within the dilated system may act as a <strong>negative pyelogram</strong>.</p><h4><strong>See also </strong></h4><p><strong>Other rim signs in radiology</strong></p><ul>
- +<li>
- +<a href="/articles/cortical-rim-sign">cortical rim sign</a> - useful in distinguishing <a href="/articles/lobar-nephronia">lobar nephronia</a> from a segmental <a href="/articles/renal-infarct">renal infarct</a>
- +</li>
- +<li>
- +<a href="/articles/soft-tissue-rim-sign">soft tissue rim sign</a> - used to distinguish a <a href="/articles/urolithiasis">ureteric calculus</a> from a <a href="/articles/phlebolith">phlebolith</a>
- +</li>
- +<li>
- +<a href="/articles/bright-rim-sign-in-dnets-1">bright rim sign</a> - described in <a href="/cases/dysembryoplastic-neuroepithelial-tumour-dnet-6">DNETs</a>
- +</li>
- +<li><a href="/articles/rim-sign-of-avascular-necrosis">rim sign (of AVN)</a></li>
Images Changes:
Image 1 CT (renal excretory phase) ( update )
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Case 1 -: Left kidney severe hydronephrosis
Image 2 X-ray ( update )
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Case 2: IVU, right kidney