PCNA and neoplasm: On the other hand, in the protein expression profile of SSC-2, the neoplastic proliferation of the tumor cells was related to the overexpression of PCNA, MPM2, KRAS, STAT3, EGFR, and bFGF and supported by the overexpression of protein translation factors, e.g., eIF5A, DHS, and DOHH, compared to SSC-1.