Superficial mucosal invasion rate was 10%(5/50).Deep submucosal invasion was the major way of tumor spread in transglottic carcinoma which equally involved the supraglottic and glottic regions.

• 跨声门癌以粘膜下深层浸润为主要方式占90%25(45/50)，向声门上区、声门区呈基本均等态势浸润扩展。