Ureterocele

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Contents 1 Discussion of Ureterocele 2 Imaging Findings for Ureterocele 3 Images 4 See Also 5 External Links 6 References for Ureterocele

[edit] 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.

[edit] 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.

[edit] Images

Patient #1

Patient #2

[edit] See Also

• Pseudoureterocele

[edit] External Links

• Goldminer: Ureterocele

[edit] 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.