Vesicoureteric junction calculus - value of twinkling artifact

Case contributed by Subhan Iqbal


Severe right groin pain

Patient Data

Age: 4 years
Gender: Male

An obstructing 4 mm calculus noted in right ureterovesical junction causing mild hydroureteronephrosis proximal to it. Note nice demonstration of twinkling artifact

Case Discussion

Twinkling artifact is the consequence of intrinsic machine noise seen with color Doppler ultrasound. It happens as a focus of alternating colors on Doppler signal behind a reflective object (such as calculi), which gives the appearance of turbulent blood flow. It occurs with or without an associated color comet-tail artifact.

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