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  • Title: [Local application of cidofovir as adjuvant therapy in recurrent laryngeal papillomatosis in children].
    Author: Pontes P, Weckx LL, Pignatari SS, Fujita RR, Avelino MA, Sato J.
    Journal: Rev Assoc Med Bras (1992); 2009; 55(5):581-6. PubMed ID: 19918660.
    Abstract:
    OBJECTIVE: Evaluate the efficacy of local application of cidofovir in association with surgical treatment of recurrent laryngeal papillomatosis in children. STUDY DESIGN: Prospective. METHODS: Fourteen patients, with an average age of 4.7 years and with two or more relapses after surgical treatment, were submitted to resection of the papillomas and injection of 22.5 mg of cidofovir (7.5 mg/ml) in the tissue where the lesions had been removed. After 2 to 3 week intervals, the same dose of cidofovir was repeated two or three times. In the case of relapse, a new cycle of surgery followed by local applications of cidofovir was repeated. Five children presented HPV-6 and five HPV-11, while in four, the type was not determined. RESULTS: Before beginning of the study, patients were submitted, on the average, to 2 operations a year for control of relapses. After treatment with cidofovir, the annual rate for surgery dropped to 1.1 (p = 0.013). The average interval between relapses before beginning of the study was 1.4 months; at the end of the study, the interval reached 4.4 months (p = 0.014). Patients with HPV-6 did not show a significant change in the intervals between relapses after treatment with cidofovir, while 60% of the children with HPV-11 were disease free at the study end. CONCLUSION: Cidofovir was found to be an effective adjuvant in the treatment of recurrent laryngeal papillomatosis in children, when used in the form of local applications in association with surgical resection of the lesions. HPV-11 may be more susceptible to the beneficial effects of cidofovir.
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