21 min
21 min
Modality: X-ray (Frontal)

- “ A surrounding radiolucent halo is present at the distal end of the ureter filled with contrast media. The cobra head sign is an indicator of an u...”

Used in the following article:

  • Cobra head sign (ureter) - “ The cobra head sign (or spring onion sign) refers to dilatation of the distal ureter, surrounded by a thin lucent line, which is seen in patients ...”

View full size version of Cobra head sign during IVU

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