Blood tests revealed total testosterone 0.5 ng/mL (NR 3.0–10.0), FSH 1.0 mIU/mL (NR 0.9–15.0), LH 0.4 mIU/mL (NR 1.3–13.0), thus indicating a diagnosis of hypogonadotropic hypogonadism. This evidence concerns the gene BRD2 and hypogonadotropic hypogonadism.