[Feasibility and efficacy of a thyroid cartilage window technique for transoral CO₂ laser resection of early glottic cancer involving the anterior commissure].

Objective:To evaluate the feasibility and efficacy of a thyroid cartilage window resection（TCWR） technique for transoral CO₂ laser resection of early glottic cancer with involvement of the anterior commissure. Methods:Twenty-one patient who underwent a TCWR technique for transoral CO₂ laser resection early glottic carcinoma involving the anterior commissure, were retrospectively analyzed. Indices including margin status, perioperative comorbidities, voice outcomes, local control rate and recurrence free survival, were assessed. Results:All 21 patients underwent a TCWR technique for resection, the organ preservation rate and negative margin achieved 100%. The local control rate achieved 100%. For two patients with subglottic involvement（9.5%）, regional recurrence with confirmation of a positive pre-laryngeal lymph node was subsequently observed; and the 5 years recurrence free survival was 90.5%. Postoperative granulomas were detected in all 21 patients in 4 weeks postoperatively, 13 of which（61.9%） spontaneously disappeared; whereas the remaining 8 patients（38.1%） demonstrated consistent presence of granuloma more than 12 weeks and underwent an additional surgical extirpation under topical anesthesia. Despite the laryngeal web developed in all 21 patients, no dyspnea and laryngeal stenosis occurred at the time of analysis. By comparison with preoperative baseline, postoperative self-assessment voice demonstrated a significant improvement（P=0.01）, while objective voice indices were not significantly altered（P>0.05）. Conclusion:TCWR technique is a valuable means for transoral CO₂ laser resection of early glottic laryngeal cancer involving the anterior commissure, with favorable voice quality and seemingly low comorbidities, which can effectively improve the safety of the anterior resection margin.