CD34 and neoplasm: Immunohistochemical detection of blood vessels in the tumor sections by anti-mouse CD34 antibody revealed that presented a mass of blood vessels in PBS or CIK group, whereas only few blood vessels which detected in AdCN205-GFP, AdCN205-IL12, CIK plus AdCN205-GFP or AdCN205-IL12 group (Figure 5).