ARG1 and neoplasm: The expression of tumour markers CDKN2A and KRT7 by qPCR was found to be significantly higher in biopsies positive for HOP-HPV as compared to the LOP-HPV group, while a significantly lower expression was found for the immune marker ARG1. Furthermore, to predict CIN2/3 versus CIN1, a combination of the HPV group (HOP/LOP) and the expression of CDKN2A, ARG1, or KRT7 was statistically significantly better than the HPV group alone.