[Triple ureter in crossed renal ectopy: an embryologic rarity].

Presentation of one case of CRE (crossed renale ectopia) with triplicity (trifidity) of the ortho and ectopic collector systems, due to the existence in both cases of pyelourethral bifidity and a third cranial blind ureter. This case represents a casual finding during a routine study of a female patient with orthostatic and exertion urinary incontinence (EUI). The case idiosyncrasies, which initially elicited the possibility of urethral ectopia, are analyzed. Incidence and variants of this unusual congenital anomaly are commented upon.