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  • Title: Platinum compound-related ototoxicity in children: long-term follow-up reveals continuous worsening of hearing loss.
    Author: Bertolini P, Lassalle M, Mercier G, Raquin MA, Izzi G, Corradini N, Hartmann O.
    Journal: J Pediatr Hematol Oncol; 2004 Oct; 26(10):649-55. PubMed ID: 15454836.
    Abstract:
    OBJECTIVES: The purpose of this study was to evaluate the severity of hearing loss after cisplatin and/or carboplatin treatment in young children and to analyze its evolution and its relation to different therapy schedules. METHODS: One hundred twenty patients treated in the Pediatrics Department at the Institut Gustave-Roussy from 1987 to 1997 for neuroblastoma, osteosarcoma, hepatoblastoma, or germ cell tumors were analyzed. Median age at diagnosis was 2.6 (range 0-17) years. Median follow-up was 7 (1-13) years. Chemotherapy regimens contained cisplatin and/or carboplatin. Three patients also received high-dose carboplatin. Cisplatin was administered at a dose of 200 mg/m/course in 72% of cases. The median cumulative dose was 400 mg/m for cisplatin and 1,600 mg/m for carboplatin. Hearing loss of grade 2 or above, according to Brock's grading scale, was revealed with pure tone audiometry and behavioral techniques. RESULTS: Carboplatin alone was not ototoxic. Deterioration of hearing of grade 2 or above was observed in 37% of patients treated with cisplatin and 43% of patients treated with cisplatin plus carboplatin (P = NS). Fifteen percent of patients experienced grade 3 or 4 ototoxicity. Ototoxicity was most often observed after a total cisplatin dose of at least 400 mg/m. No improvement was observed with time; on the contrary, worsening or progression of hearing loss at lower frequencies was detected during follow-up. Only 5% of audiograms showed toxicity of at least grade 2 before the end of therapy; in contrast, this level was observed in 11% of early post-therapy evaluations and in 44% after more than 2 years of follow-up. CONCLUSIONS: Children treated with cisplatin at cumulative doses approaching 400 mg/m require long-term surveillance to avoid overlooking hearing deficits. Carboplatin, at a standard dose, does not appear to be a significant risk factor for ototoxicity even in patients who have already been treated with cisplatin.
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