Cobra head sign (ureterocele)

Case contributed by Mohammad Taghi Niknejad
Diagnosis certain

Presentation

Work up for right flank pain.

Patient Data

Age: 5 years
Gender: Female
Fluoroscopy
Frontal
Frontal
Frontal
Frontal
Frontal
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Info

The right urinary drainage system is duplicated, and there is focal dilatation of the distal right ureter, surrounded by a thin lucent line resembling a cobra head sign consistent with the ureterocele. 

Case Discussion

The cobra head sign is an indicator of an uncomplicated ureterocele.

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