6 根據American Joint Committee on Cancer（AJCC）出版的Cancer Staging Manual（2002年, 第6版），有關大腸直腸癌之病理分期之敘述，何者為非？

在stageⅠ時，並沒有淋巴結轉移

在stageⅡ時，並沒有淋巴結轉移

StageⅡ大腸癌經手術治療後，五年存活率大約為75%

有遠端轉移時（stage Ⅳ）五年存活率大約為15%

ANS D

According to the American Cancer Society statistics in 2006,^[71] over 20% of patients present with metastatic (stage IV) colorectal cancer at the time of diagnosis, and up to 25% of this group will have isolated liver metastasis that is potentially resectable. Lesions which undergo curative resection have demonstrated 5-year survival outcomes now exceeding 50%.^[7