Vesicoureteric junction and renal calculi: the value of twinkle artifact
Diagnosis almost certain
Presentation
Left sided abdominal pain.
Patient Data
Age: 60 years
Gender: Male
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Left vesicoureteric junction (VUJ) stone creating a twinkle artifact; there was no evidence of this calculus with B-mode imaging.
Left renal caclulus: a small, markedly echogenic region is seen in the lower pole with B-mode imaging. No soft or hard shadowing was demonstrated. The use of color Doppler produced twinkle artifact posterior to this area identifying a small calculus.
The collecting system and ureter were not dilated, suggesting that the VUJ calculus was non-obstructive.
Case Discussion
Non-obstructive left VUJ and left renal calculi were demonstrated using color Doppler to generate the twinkle artifact. These stones were confirmed with CT (not shown).
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