FOLH1 and neoplasm: A significant increase in radioactivity was detected in LNCAP tumours (PSMA positive) (0.637 ± 0.11 MBq) as compared to both PC3 tumours (PSMA negative) (0.234 ± 0.08 MBq) (Figure 2A) and all other examined organs after 30 min (Figure 2B).