Rim sign (chronic hydronephrosis)
Right side urolithiasis
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You can see a rim like enhancement at the periphery of the right hydronephrotic kidney. There are also several radio opaque stones.
In a patient with chronic hydronephrosis, enhancement may occur at the periphery of the residual, but markedly atrophic, renal parenchyma, surrounding the dilated calices and renal pelvis. 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.
A case of Prof. Saeed Rad, Tabriz, Iran
See also other rim sign in radiology
- 2. Weissleder R, Wittenberg J, Harisinghani MG et-al. Primer of diagnostic imaging. Mosby Inc. (2007) ISBN:0323040683. Read it at Google Books - Find it at Amazon
- 1. Dyer RB, Chen MY, Zagoria RJ. Classic signs in uroradiology. Radiographics. 2004;24 Suppl 1 (suppl 1): S247-80. doi:10.1148/rg.24si045509 - Pubmed citation