A.當(dāng)腫瘤已轉(zhuǎn)移則無(wú)需手術(shù) B.對(duì)Ⅱ期腫瘤,手術(shù)應(yīng)結(jié)合化療和放療 C.手術(shù)切除范圍越廣泛越好 D.對(duì)各期腫瘤,術(shù)前化療均無(wú)必要 E.對(duì)Ⅱ期腫瘤,局部切除腫瘤后不必化療