Comet tail sign (phleboliths)

Comet tail sign (in urological imaging) is helpful in distinguishing a ureteric calculus from a phlebolith and strongly favours the latter. 

The sign refers to a tail of soft tissue extending from a calcification, representing the collapsed/scarred/thrombosed parent vein. When well seen it is said to have a positive predictive value of 100% 1

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Article information

rID: 10393
System: Vascular
Section: Signs
Synonyms or Alternate Spellings:
  • Comet tail sign (urology)
  • Comet tail sign (GUT)

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Cases and figures

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