Discussion of Ureterocele
- Cystic dilatation of the intravesical segment of the ureter.
- Ureteroceles may be associated with either a single or a duplex ureter.
- The congenital defect is the obstruction of the meatus, and the ureterocele is simply a hyperplastic response to this obstruction.
- Ureteroceles may be either simple or ectopic.
- An ectopic ureterocele is more inferiorly located than a simple ureterocele.
- It is usually unilateral and is far more common in girls than in boys.
 Imaging Findings for Ureterocele
- At US, the ureterocele is identified as a cystic intravesical mass contiguous with a dilated ureter.
- At VCUG, a collapsed simple ureterocele usually manifests as a rounded filling defect within the bladder.
- When performed, IVU will usually demonstrate a collection of contrast material within the ureterocele, which produces the classic cobra head sign consisting of a round or oval area of increased opacity surrounded by the radiolucent halo of the wall of the ureterocele.
 See Also
 External Links
 References for Ureterocele
- Teresa Berrocal, Pedro López-Pereira, Antonia Arjonilla, and Julia Gutiérrez. Anomalies of the Distal Ureter, Bladder, and Urethra in Children: Embryologic, Radiologic, and Pathologic Features. RadioGraphics 2002 22: 1139-1164.