Sox4, a transcription factor of the member of the Sry‐related high mobility group box (Sox) family, was recognized a master mediator in cancer stemness and tumorigenicity.21 SOX4 has been revealed to promote tumorigenesis in diverse cancers, including prostate cancer, gastric cancer and liver cancer.22, 23, 24 A recent study demonstrated that Sox4 was regulated by lncBRM via competitively binding miR‐204.25 The present study found the overexpression of SOX4 both in EOC cell lines and tissues. This evidence concerns the gene SOX4 and prostate cancer.