Soft-tissue rim sign
 Discussion of Soft-tissue rim sign
- Sign helps distinguish a stone in the ureter from a phlebolith.
- The soft-tissue rim sign is caused by edema of the ureteral wall surrounding a stone at its site of impaction.
- It should be noted, however, that the soft-tissue rim sign may be absent with stones larger than 4 mm or when a stone is impacted at the ureterovesical junction.
 See Also
 References for Soft-tissue rim sign
- Raymond B. Dyer, Michael Y. Chen, and Ronald J. Zagoria. Classic Signs in Uroradiology. RadioGraphics 2004 24: S247-280S.