“…Up to now, by either analysis of a single dataset or integrated analysis of multiple datasets in GEO, several studies have dug out genes that exert important influence on the occurrence and progression of PCa, such as cadherin 1 (CDH1) (Fang et al, 2017), CDCA8 (Zhao et al, 2017), RPS21 (Fan et al, 2018), PIK3R1 (He et al, 2018), epithelial cell adhesion molecule (EPCAM) (Lu & Ding, 2019), LMNB1 (Song et al, 2019b), IGF2 (Tan, Jin & Wang, 2019), and IKZF1 (Tong, Song & Deng, 2019). However, the key genes detected by the above studies are largely different from each other and had little in common, and such discrepancy could be attributed to the fact that PCa is considered as a heterogenous disease as a whole (Liu et al, 2019a; Thomas & Pachynski, 2018). As a consequence, further studies in this regard is still required for the exploration and validation of key genes.…”