Comet tail sign: Urology

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

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

See also

Edit Article Share Article

Article Information

rID: 10393
System: Vascular
Section: Signs
Synonyms or Alternate Spellings:
  • Drag
    Comet tail: photo
    Drag here to reorder.
  • Updating… Please wait.


    Error Unable to process the form. Check for errors and try again.

    Alert_accept Thank you for updating your details.