How to improve the preoperative diagnosis,how to choose the most proper surgery way,whether the adjuvant therapy is effective,and what are the prognosis factors remain some disagreements.

• 如何提高术前诊断的正确性、如何选取最合适的手术方式、术后辅助治疗是否有价值以及预后评价指标的选择仍存在争议。