POU5F1 and neoplasm: Oct4 high expression was significantly related to age >60 years (p=0.020), male (p=0.020), macroscopic type III-IV (p<0.001), tumor size >7cm (p=0.023), N3 stage (p=0.003), M1 stage (p=0.011) and TNM III-IV stage (p=0.001).