Kallmann syndrome (KS) is defined by the association of idiopathic hypogonadotropic hypogonadism and anosmia/hyposmia.
[scienceopen.com]
[…] or anosmia Yousem, DM; Geckle, RJ; Bilker, W; McKeown, DA; Doty, RL Epidemiology, diagnosis, and treatment of male hypogonadotropic hypogonadism Lenzi, A; Balercia, G; Bellastella
[deepdyve.com]
Anosmia or hyposmia is related to the absence or hypoplasia of the olfactory bulbs and tracts.
[uniprot.org]