[Congenital adrenal hyperplasia causing male infertility. Report of one case]

In males, congenital adrenal hyperplasia due to 21 hydroxylase deficiency is associated to normal fertility or infertility caused by a hypogonadotrophic hypogonadism (HH) or gonadal damage caused by intratesticular adrenal remnants. We report a 29-year-old male with azoospermia, without any important personal or family background. Physical examination was normal, his height was 150 cm and his testicular volume was 10 ml (normal 15 to 25 ml). Laboratory showed a normal testosterone and FSH and LH in the low normal limit. These results discarded a HH, whose diagnostic requirements are a low testosterone and inadequately normal or low gonadotrophins. A testicular biopsy was informed as compatible with HH. A 21 hydroxylase deficiency was suspected and confirmed with extremely high levels of 17 hydroxyprogesterone at baseline and after stimulation with fast acting ACTH. Clomiphene citrate did not increase testosterone or gonatrophin levels. Testicular ultrasound discarded the presence of adrenal nodules. Betametasone therapy resulted in a normal testicular development, normalization of sperm count, reduction of 17 hydroxyprogesterone and testosterone levels with an ulterior rise of the latter. Spontaneous paternity was achieved twice. It must be remembered that in cases of azoospermia due to congenital adrenal hyperplasia, testosterone produced by adrenal glands hinders the laboratory diagnosis of HH.