highly significantp<0.001
GPC-3 showed non-significant difference between different grades (p>0.05) in both malignant and peri-malignant tissue Also, our study showed a highly significant difference in Ki-67 expression between different grades in peri-malignant tissue (N) (p<0.001) but nonsignificant difference between different grades in malignant tissue (T) (p>0.05).