Lardon Fernandez, MaritaUberos Fernandez, JoseMoreno Madrid, Francisco2023-02-122023-02-122017-02-010325-0075http://hdl.handle.net/10668/19377Ureterocele is a relatively common malformation of the urinary system in children; however, the ureterocele prolapse through the urethra is an extremely rare presentation. Urological nuclear magnetic resonance is the test of choice for definitive diagnosis. Initial treatment of a prolapsed ureterocele involves decompression of the mass.We report the case of a 7-month-old infant with duplication of the collecting system and right ectopic ureterocele appearing as a vulvar mass.esureterocelepediatricsprolapsevulvar massresearch articleopen access10.5546/aap.2017.e431668-3501https://doi.org/10.5546/aap.2017.e43396624200024