Prognostic impact of discordant lesions on [&lt;sup&gt;18&lt;/sup&gt;F]FDG and [&lt;sup&gt;68&lt;/sup&gt;Ga]Ga-FAPI-04 PET/CT compared to histological FAP expression in neuroendocrine neoplasms. The gene discussed is FAP; the disease is neuroendocrine neoplasm.