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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 colour 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.