disease > genetic disease > hereditary disease > fatal familial insomnia

... > disease > nervous system diseases > central nervous system diseases > cerebral disorder > prion disease > fatal familial insomnia

disease > degenerative disease > prion disease > fatal familial insomnia

disease > infectious disease > prion disease > fatal familial insomnia

... > disease > nervous system diseases > neurological disorder > sleep disorder > insomnia > fatal familial insomnia