FGFR1 mutations have been identified in about 10% of patients with Kallmann syndrome. Recently cases of idiopathic hypogonadotropic hypogonadism (IHH) with a normal sense of smell (nIHH) have been reported.
Reproductive Endocrine Unit, Department of Medicine, The Harvard Center for Reproductive Endocrine Sciences, Massachusetts General Hospital, Boston, Massachusetts 02114, USA.
