From the case: Cobra head sign

Fluoroscopy
Frontal
Modality: Fluoroscopy (Frontal)

- “ A surrounding radiolucent halo is present at the distal end of the ureter filled with contrast media during an excretory phase of an intravenous u...”

Used in the following article:

  • Ureterocele - “ Ureteroceles represent abnormal congenital dilatation of the distal-most portion of the ureter. The dilated portion of the ureter may herniate int...”
  • 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

Updating… Please wait.

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

 Thank you for updating your details.