Overexpression of G6PD is observed in several types of cancer, such as colorectal cancer [57], gastric cancer [58], lung cancer [59], bladder cancer [60], glioma [61], etc. Elevation of G6PD is associated with poor prognosis metastasis, and tumor growth in cancer patients [57, 59–63]. The gene discussed is G6PD; the disease is gastric cancer.