hypogonadotropic hypogonadism 6 with or without anosmia (MONDO_0012988) is any hypogonadotropic hypogonadism in which the cause of the disease is a mutation in the FGF8 gene. Also known as: FGF8 hypogonadotropic hypogonadism, hypogonadotropic hypogonadism caused by mutation in FGF8.