The thickness of peritumor low-density band was associated with lymph node metastasis (P< 0.01), histologic type (P<0.001) and tumor location (P<0.05).
瘤周低密度带厚度与淋巴结转移（P<0.01）、组织学类型（P<0.001）及肿瘤部位（P<0.05）均密切相关。
The positive expression of DPC4 had no correlation with tissue type and cellular differentiation(P>0.05), but it was closely associated with lymph node metastasis(P<0.05).
DPC4与组织学类型、肿瘤细胞分化程度无关（P>0.05），但与淋巴结转移显著相关（P<0.05）。
VEGF expression was more frequent in lymph node(P<0.05) and hematogenous(P<0.05) metastatic tumors than in non-metastatic tumors.
VEGF表达阳性率在发生淋巴结转移、远处转移病人明显高于无转移者（P均<0.05）。
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