Presentation
Right side urolithiasis
Patient Data
You can see a rim like enhancement at the periphery of the right hydronephrotic kidney. There are also several radio opaque stones.
Case Discussion
The findings of the intravenous urogram (IVU) are compatible with the rim sign in the right kidney due to chronic hydronephrosis.
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
- 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)