The resulting data may provide scientific evidence supporting Bmi-1 as a novel target for the development of new therapies for gastric cancer and as a new biomarker to be evaluated by the maximum standardized uptake value (SUVmax) using 18F-deoxyglucose positron emission tomography/computed tomography (18F-FDG PET/CT) imaging. The gene discussed is BMI1; the disease is gastric cancer.