Ureteroceles are congenital, cystic dilations of the terminal, intravesical portion of the ureter. The associated ureteral orifice, often extremely difficult to visualize, may be partially or totally obstructed, resulting in variability in size from small to very large. Ureteroceles can also vary in location from intravesical to ectopic. The use of fetal ultrasonography has improved the diagnosis of ureteroceles; however, they often remain difficult to diagnose and require complete postnatal evaluation when suspected.