Abstract
The aim of the study was to update our experience treating patients with glottic carcinoma in situ (CIS) with curative radiotherapy (RT). Fifty patients received continuous-course RT using once-daily fractionation. Twenty-eight (56%) had recurrent or persistent CIS after resection. Median total dose was 63.0 Gy; median dose per fraction was 2.25 Gy. Median follow-up was 9.6 years for all patients and 8.4 years for survivors. After RT, 5 patients (10%) recurred locally; salvage surgery was performed in 4 (1 refused). Five-year outcomes were as follows: local control, 91%; ultimate local control (including patients successfully salvaged after local recurrence), 100%; ultimate local control with larynx preservation, 93%; local-regional control, 91%; ultimate local-regional control, 100%; distant metastases-free survival, 100%; cause-specific survival, 100%; and overall survival, 81%. No patient experienced a severe complication. RT is an excellent treatment for patients with CIS recurrent after transoral excision and those with previously untreated CIS who are unsuitable for partial laryngectomy.
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