Stage II includes: T2, N0, M0. T2: (Supraglottis) Tumor invades mucosa of more than one adjacent subsite of supraglottis or glottis or region outside the supraglottis (e.g., mucosa of base of tongue, vallecula, medial wall of pyriform sinus) without fixation of the larynx. (Glottis) Tumor extends to supraglottis and/or subglottis, and/or with impaired vocal cord mobility. (Subglottis) Tumor extends to vocal cord(s) with normal or impaired mobility. N0: No regional lymph node metastasis. M0: No distant metastasis. (AJCC 6th and 7th eds.) [from NCI]