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[Obstructive uropathy secondary to the periurethral injection of teflon paste].

A case of obstructive uropathy secondary to a periurethral teflon injection, performed to correct urinary incontinence, is presented. The obstruction of one ureter was caused by an inflammatory reaction followed by fibrosis, which could be explained by the presence of a local infection or of intolerance to the teflon paste. The use of prophylactic antibiotics and routine renal echography are mandatory after periureteral or periurethral injections of large quantity of teflon.