Given the number of patients with a histological diagnosis, it would be ideal to correlate the histologically proven HCC diagnosis with PSMA uptake; however, despite seven of the nine studies including cases with histology, only in two studies [23,27] was it certain which patients these were, and in relation to PSMA uptake data, unfortunately, for the remaining five studies, this was not clarified. This evidence concerns the gene FOLH1 and hepatocellular carcinoma.