CDK12 and ovarian serous carcinoma: The mutations, amplifications, deletions, or fusion of CDK12 gene have been recently reported in different types of cancers, such as loss-of-function mutations of genomic are correlated with tandem duplications (TDs) and homologous recombination (HR) in high-grade serous ovarian carcinoma and prostate cancer, which suggests that CDK12 is a tumor suppressor.