A.20%~28% B.40%~48% C.55%~58% D.70%~78% E.90%~98%
A.腫瘤對(duì)放射線敏感 B.腦轉(zhuǎn)移發(fā)生率高且腫瘤對(duì)放射線敏感 C.大腦神經(jīng)細(xì)胞對(duì)放射線不敏感 D.預(yù)防性照射比治療性照射療效好 E.照射40Gy以下,不良反應(yīng)少
A.不需處理 B.預(yù)防性上頸部放療 C.預(yù)防性頸清除術(shù) D.頸轉(zhuǎn)移發(fā)生時(shí)再放療或手術(shù) E.預(yù)防性全頸放療