CD34 and neoplasm: Histological analysis further confirmed the tumorigenicity and gastric origin of this combination by showing high expression levels of cytokeratin (PCK-26; 0.797 ± 0.026, 0.682 ± 0.025, 0.761 ± 0.072), CD-34 (0.730 ± 0.067, 0.722 ± 0.030, 0.749 ± 0.035) and low expression levels of SMA-α (0.092 ± 0.017s, 0.046 ± 0.013, 0.099 ± 0.017) in M0, M1, and M2 tumor tissues, respectively (p < 0.001; Figure 4) [40,41].