Cytochrome P450 17A1 (CYP17A1), also known as 17α-monooxygenase or 17α-hydroxylase/17,20-lyase/17,20-desmolase, is essential in steroidogenesis, including androgen biosynthesis, and contributes significantly to prostate cancer pathogenesis (Aherrahrou et al. 2020; Cao et al. 2020). The gene discussed is CYP17A1; the disease is Familial prostate cancer.