Abstract
Ureteroceles are cystic dilatations of the submucosal terminal ureter that present anatomical variations, with several possible combinations of clinical and radiological presentations (uni or bilateral, orthotopic or ectopic, related to single or duplicated systems). An important concept is that ectopic and extravesical ureteroceles are not synonyms: an ectopic ureterocele may be intravesical, as the definition of ectopic ureterocele refers to any ureterocele that does not correspond to the implantation of the distal ureter in the normal site (the lateral limit of the trigonal bar). As a consequence, a ureterocele inserted near the bladder neck, for example, is ectopic, but still intravesical. The misunderstanding of this concept may cause difficulties to compare research data about ureteroceles, due to equating intravesical to orthotopic ureteroceles or to excluding intravesical ureteroceles from analyses concerning ectopic ureteroceles.
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