Soft tissue rim sign

The soft-tissue rim sign is used to distinguish a ureteric calculus from a phlebolith. The former appears as a calcific density with a surrounding rim of soft tissue which represents the edematous ureteric wall. Phleboliths on the other hand usually have imperceptible walls (although up to 8% may have a soft tissue rim sign 2) but may have a comet-tail sign.

This sign may be absent in cases of a larger (>4mm) or ureterovesical calculus 3.

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Article information

rID: 10394
System: Urogenital
Section: Signs
Synonyms or Alternate Spellings:
  • Rim-sign (of ureteric calculi)

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Cases and figures

  • Case 1 - soft tissue rim sign - right
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  • Case 2
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