Another study showed that compared with other NSCLCs, 18F-fluorodeoxyglucose (18-FDG) uptake, glucose metabolism, angiogenesis, and cell proliferation were significantly elevated in patients with PPC [5], with 18F-FDG uptake significantly correlated with VEGF expression, which is an important prognostic indicator in various cancers [27]. This evidence concerns the gene VEGFA and cancer.