Comet tail sign (phleboliths)
The comet tail sign (in urological imaging) is helpful in distinguishing a ureteric calculus from a phlebolith and strongly favors 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% .
See also
Siehe auch:
![Click für weniger anzeigen](/sites/all/modules/pacs/tools/imgs/collapse_up.png)
![](/sites/all/modules/pacs/tools/imgs/Iris_color_40.png)