Positive rates of PTEN protein expression was not associated with the pathological types and cellular differentiation degree (P>0.05), but was highly associated with lymph node metastasis(P=0.009).

• PTEN蛋白阳性表达率分别在肺癌的组织学分型、分化程度之间比较，差异均无显著性(P>0.；05)；而与淋巴结转移有关(P=0