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Is it reasonable to treat refractory voiding dysfunction in children with botulinum-A toxin?Radojicic ZI, Perovic SV, Milic NM Department of Urology, University Children's Hospital, Tirsova 10, 11000 Belgrade, Yugoslavia-Serbia. zotiogiv@Eunet.yu PURPOSE: We present our results with botulinum-A toxin transperineal pelvic floor/external sphincter injection combined with behavioral and biofeedback reeducation in children with voiding dysfunction who had been resistant to previously applied therapies. MATERIAL AND METHODS: Eight boys and 12 girls between 7 and 12 years old (mean age 9) with recurrent urinary tract infection, an interrupted or fractional voiding pattern and high post-void residual urine in whom behavioral, short biofeedback and alpha-blocker therapies had failed were included in the study. They were treated with botulinum-A toxin at a dose of 50 to 100 U. Botulinum-A toxin was injected transperineally into the pelvic floor and/or external sphincter in all patients. In boys the sphincter was localized endoscopically before injection (endoscopically assisted transperineal approach). Behavioral and biofeedback reeducation started 15 days after injection. RESULTS: Followup was between 9 and 14 months. All patients were without urinary tract infection and fever, while 5 were still on chemoprophylaxis. Six months after treatment residual urine decreased in 17 of 20 patients by 0 to 130 ml (mean +/- SD 45.75 +/- 32.17 ml, t = 6.360, p <0.001). Nine patients reestablished a normal voiding curve and 8 showed improvement. Three did not manifest any significant improvement. In 1 girl transitory incontinence resolved spontaneously within 48 hours. There were no other complications. CONCLUSIONS: The effect of botulinum is transitory. However, it can break the circle of detrusor-sphincter dyssynergia and the period when it is sustained can be used for retraining the patient in normal voiding. At this moment botulinum-A toxin is one of last options in refractory cases of voiding dysfunction. Published 6 June 2006 in J Urol, 176(1): 332-6; discussion 336.
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