The number of lymphatic metastatic cases is 31, within them SLN metastasis was found in 25 cases, the accurate rate is 80.6% (25/31), non-SLN metastatic rate is 19.4% (6/31).

• 在31例淋巴结转移患者中，有25例存在前哨淋巴结转移，准确率为80.；6%25(25/31)，非前哨淋巴结转移率为19