Abstract
Patients with early glottic cancer sometimes exhibit new glottic cancer events after 5 years. This study aimed to analyse the patterns and risk factors of new glottic cancer events in patients with early glottic cancer 5 years after initial treatment. In total, 209 patients were included in this study. Age, sex, T stage, anterior commissure involvement, smoking pattern and treatment modality were retrospectively analysed. The median follow-up was 91 (range, 60-266) months. The median time for the occurrence of new glottic cancer events was 97 (range, 61-199) months. New glottic cancer events occurred 5 years after initial treatment in 16 (7.6%) patients, among whom 12 (75.0%) had new glottic cancer event lesions overlapping with initial lesions. Smoking cessation after treatment was significantly correlated with fewer new glottic cancer events after 5 years. New glottic cancer events occurring 5 years after initial treatment in patients with early glottic cancer are not negligible. In particular, if smoking is continued after treatment, these patients can experience new glottic cancer events even after 5 years.
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