SOX4 and cancer: 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.