The analysis of immunohistochemistry stainings for PCNA and XRCC3 showed no significant differences for PCNA expression; in contrast the expression of XRCC3 was shown in the cytoplasm and nucleus and was four-fold higher in the periphery of the XRCC3 OE cell tumours where 61% of the cells showed high nuclear staining. Here, XRCC3 is linked to neoplasm.