KRAS and neoplasm: Therefore, in our study, we evaluated FDG uptake pattern in patients who were initially staged with 18F-fluoro-2-deoxy-glucose positron emission tomography/computed tomography (18F-FDG PET/CT) imaging, which is increasingly used in the diagnosis, staging and prognosis determination of various types of cancer, and the presence of KRAS mutation and the association of tumor localization with these two factors and questioned the prognostic power and survival impact of these associations.