GRPR and prostate cancer: Some notable examples are 3′-deoxy-3′[18F]fluorothymidine ([18F]FLT) for monitoring nucleoside transporters/cell proliferation, [18F]FAZA and [18F]FMISO for identifying regions of hypoxia, 68Ga-NOTA-bombesin derivatives for imaging prostate cancer by targeting gastrin-releasing peptide receptors (GRPR), and many others [7,8,9,10].