Frontal
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 indicates an uncomplica...”

Used in the following article:

  • Cobra head sign (ureter) - “ The cobra head sign, also known as the spring onion sign, refers to dilatation of the distal ureter, surrounded by a thin lucent line, which is se...”

View full size version of Cobra head sign - intravenous urogram

Updating… Please wait.

 Unable to process the form. Check for errors and try again.

 Thank you for updating your details.