IV, 205) cases, 234 were originated from pyriform sinus, 21 from postcricoid, 35 from posterior pharyngeal wall and 15 from superior hypopharynx.
英
美
- IV期205例),其中梨状窝癌234例,环后癌21例,下咽后壁区癌35例,下咽上区癌15例。