PCGEM1 and posterior cortical atrophy: About 15,000 lncRNAs have been identified in the human genome,[28] many of which have shown to be involved in carcinogenesis.[29] Recently, several studies disclosed a potential diagnostic or prognostic value of diverse lncRNAs in PCa.[30] For example, Petrovics et al[31] assessed PCGEM1 expression in PCa, and suggested that this lncRNA is a promising biomarker and potential therapeutic target in high-risk PCa patients.