Clinical Features:
A 28 years old male patient came with left flank pain.
Ultrasound Features:
A bright echogenic structure casting posterior acoustic shadow on gray scale & twinkling artifact on color Doppler is noted within the left renal pelvis with mild pelvicalyceal system dilatation & increased renal parenchymal echogenicity.
Remember:
Color Doppler twinkling artifact is a useful finding to confirm tiny urinary calculus in confusing cases.
Ultrasound Images:
Fig: A bright echogenic structure casting posterior acoustic shadow on gray scale & twinkling artifact on color Doppler is noted within the left renal pelvis with mild pelvicalyceal system dilatation & increased renal parenchymal echogenicity.
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