PDGFRA and gastrointestinal stromal tumor: This cohort study patients with platelet-derived growth factor receptor α (PDGFRA)-mutant GIST who underwent F 18–labeled positron emission tomography ([18F]FDG-PET) assess the degree of [18F]FDG uptake of PDGFRA-mutant gastrointestinal stromal tumors, with a focus on the D842V-mutant subgroup.