Since LCK-expressing lymphocytes infiltrate prostate tumors [50], we exploited the fact that HULLK lacked LCK exons 1–5, and used the ratio of c-terminal LCK primers:n-terminal primers (HULLK:FL-LCK) to distinguish HULLK expression from LCK. We noticed that the ratios for the FFPE samples were higher than the fresh frozen tissue. This evidence concerns the gene LCK and prostate neoplasm.