Abstract: ［ABSTRACT］Objective: To evaluate the surgical methods and prognosis of glottic carcinoma originating from posterior commissure of vocal cord. Methods: Eight patients with glottic carcinoma originating from posterior commissure were enrolled in this study. Of them, 3 cases of TisN0M0 were operated on with selfretaining laryngoscope, 3 cases of T1M0N0 and 2 cases of T2N0M0　were dealt with partial laryngectomy and the laryngeal defects were reconstructed by bipedical sternohyoid muscle flap. Results: After a followup over 5 years, 8 patients were extubated successfully and could speak and take food by mouth freely; 2 patients had cervical lymph node metastasis in the same side and 3 recurred including 1death without therapy. Conclusion: Compared with general glottic carcinoma, the recurrence rate and the cervical lymph node metastasis rate of carcinoma originating from posterior commissure are high significantly. Neck dissection in the same side would be necessary for tumor not in situ and the cutting edge should be over 5 mm away from the tumor. Bipedical sternohyoid muscle flap is credible for the laryngeal defects.

Key words: Neck dissection, Glottic carcinoma, Sternohyoid muscle flap