[Contralateral reflux after unilateral antireflux surgery]

108 unilateral antireflux surgical procedures are analysed over a period of seven years. All the cases were operated upon for essential or primary renal reflux, using ureteral advancement techniques crossing the bladder midline. There were 10 patients who developed contralateral renal reflux (CRR) in the postoperative evolution (9,2%). The CRR disappeared in all cases, but three of them needed surgical treatment because of urinary tract deterioration (Reflux nephropathy, bladder lithiasis, and shift of reflux grade from I to III). Two different surgical antireflux techniques were utilised. Using the Glenn-Anderson's technique the incidence of CRR was 9/68 (13,2%) whereas this incidence was 1/40 (2,5%) using the Cohen's technique, which does not disrupt the trigonal area. The authors do not believe that systematic bilateral antireflux surgery for unilateral reflux is necessary. When CRR occurs an initially conservative management is recommended.