Gallium-68 is the most widely used radionuclide, labeled against PSMA-11 and in combination with [177Lu]-Lu-DOTA-PSMA-617, in the diagnosis of prostate cancer with additional theranostic application, due to 68Ga/177Lu-radiolabelled tracers’ similar biological behavior [177]. The gene discussed is FOLH1; the disease is prostate cancer.