raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:586130

Sporadic fatal insomnia

Type
Disease
Group
Disorder
Inheritance
Not applicable
Age of onset
Adult, Elderly
Status
active

A rare sporadic human prion disease characterized by adult onset of progredient neurodegeneration presenting as a combination of psychiatric, sleep, and oculomotor disturbances, with development of progressive cognitive impairment (the predominantly affected cognitive domains being memory, temporal and/or spatial orientation, language, executive functions, and attention), postural instability, and sometimes additional motor abnormalities and autonomic hyperactivity, in the course of the disease. Bilateral thalamic hypometabolism on FDG-PET imaging and positive prion seeding activity in the cerebrospinal fluid are present in many cases. The disease is fatal within typically two to three years.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enSporadic fatal insomnia
frInsomnie fatale sporadique
deInsomnie, fatale sporadischeSFI
esInsomnio fatal esporádico
itInsonnia sporadica letale
nlSporadische fatale insomnie
ptInsónia fatal esporádica
plSporadyczna śmiertelna bezsenność
csSporadická fatální nespavost
ukСпорадичне фатальне безсоння
zhSporadic fatal insomnia
trSporadic fatal insomnia

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
ICD-10A81.9NTBTattributedvalidated
ICD-116D85.5NTBTindexvalidated
MONDO0035614Evalidated
UMLSC5567889Evalidated

E exact · NTBT this ORPHAcode is narrower than the target · BTNT broader than the target · ND not decided.

3

Classification

Preferential parent (Orphanet linearisation):

Parents in the classifications (1):

No children.

4

Genes

0 direct

Orphanet records no gene directly on this code.

5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families27 casesWorldwideCase(s)Validated30048013[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidated30048013[PMID]

Value is Orphadata's ValMoy: the mean estimate per 100 000 for prevalence and incidence, the number of cases or families for case reports.

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HPO phenotypes

Orphanet has no HPO annotation for this code in this release.

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Sources for this card