true vocal cords การใช้

• The true vocal cords and Subglottic area are rarely involved.
• For the purposes of tumour staging, the larynx is divided into three anatomical regions : the glottis ( true vocal cords, anterior and posterior commissures ); the supraglottis ( epiglottis, arytenoids and aryepiglottic folds, and false cords ); and the subglottis.