Immunochemistry analysis showed that PCBP1 protein level was high in L-OHP resistant patient tumor tissues (Figure 4A), but was very low in L-OHP resistant peri-cancerous tissues, L-OHP sensitive patient tumor tissues or L-OHP sensitive peri-cancerous tissues (Figure 4B–4D), and the difference in PCBP1 expression level between L-OHP resistant cancerous tissue and sensitive cancer tissue or peri-cancerous tissue was significant (p < 0.05). Here, PCBP1 is linked to cancer.