Purpose: Evaluate changes in hearing thresholds in patients undergoing cancer treatment.Method: Prospective, longitudinal study carried out at Cancer Center of a Sergipe´s public hospital, Brazil. Audiological evaluation (Conventional Pure Tone Audiometry) have been performed in 20 patients following eight weeks of cancer treatment (reference exam) and 20 weeks (sequential exam) of treatment. All survivors had normal hearing thresholds before cancer treatment. The procedure has been approved by the Ethics in Research Committee, under protocol # 33665014.7.0000.5546.Results: Head and neck cancer displayed oncology highest incidence (35%). Referential exam, eight weeks before treatment, displayed 15% with sensorineural hearing loss and 17.5% at second tests. It was observed a slight worsening for all test frequencies of referential and sequential exam. Tinnitus was the biggest complaint (81.3%), but there was no statistic correlation between hearing loss (p=0.89). Conclusion:Hearing monitoring form this small sample suggest chemotherapy and radiotherapy treatments can have a detrimental effect on hearing thresholds significate for 2 to 8kHz eight weeks after cancer treatment and 4 to 8kHz 20 weeks before.
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