Notably, the 68Ga-labelled prostate cancer radiotracer, 68Ga-HBED-PSMA, consists of at least two distinguishable (and as yet, undefined) chemical species.33,34 However, the biological profiles of each separate 68Ga-HBED-PSMA species have not been elucidated, and this has not prevented widespread and routine use of 68Ga-HBED-PSMA, and its recent FDA approval, for clinical prostate cancer imaging.4,35. Here, FOLH1 is linked to prostate carcinoma.