[Septo-optical dysplasia: oligosymptomatic form (author's transl)].

It is reported on a nine year old boy with the oligosymptomatic form of the septo-optical dysplasia de Morsier: congenital nystagmus with nearly complete loss of visus due to a hypoplasia of the opticus-nerve of both sides, growth retardation (dwarfism) because of STH-deficiency and lack of the gonadotropins. The septum pellucidum is present. The cause of this embryologic malformation within the prosencephalon is not known.