The average BSV of CD133 mRNA was 0.029 ± 0.060 (0~0.151) in the group of healthy volunteers, 0.059 ± 0.099 (0~0.266) in the group of patients with GU, and 0.262 ± 0.149 (0~0.746) in the group of patients with GC. The gene discussed is PROM1; the disease is gastric cancer.