raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:163708

Cryptogenic late-onset epileptic spasms

Synonyms: Late-onset infantile spasms

Type
Disease
Group
Disorder
Age of onset
Childhood
Status
active

Cryptogenic late-onset epileptic spasms is a rare epilepsy syndrome characterized by late-onset (after 1 year old) epileptic spasms that ocurr in clusters, associated with tonic seizures, atypical absences and cognitive deterioration. Language difficulties and behavior problems are frequently present. EEG is characterized by a temporal, or temporofrontal, slow wave or spike focus combined with synchronous spike-waves and no hypsarrhythmia or background activity.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enCryptogenic late-onset epileptic spasmsLate-onset infantile spasms
frSpasme cryptogénique à début tardifSpasme infantile à début tardif
deEpilepsie, kryptogenetische, spät beginnende
esEspasmos epilépticos criptogénicos de inicio tardíoEspasmos infantiles de inicio tardío · Espasmos infantiles tardíos
itSpasmi epilettici criptogenici ad esordio tardivo
nlCryptogene epileptische spasmen met late aanvangInfantiele spasmen met late aanvang
ptEspasmos epilépticos criptogénicos de início tardio
plKryptogenne drgawki padaczkowe o późnym początkuDrgawki dziecięce o późnym początku
csKryptogenní epileptické spazmy s pozdním nástupemInfantilní spazmy s pozdním nástupem
ukКриптогенні пізні епілептичні спазмиПізній початок дитячих спазмів
zh隐源性迟发性癫痫痉挛晚发性婴儿痉挛
trKriptojenik geç başlangıçlı epileptik spazmlarGeç başlangıçlı infantil spazmlar

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
ICD-10G40.4NTBTattributedvalidated
ICD-118A61.2YNTBTindexvalidated
MONDO0015585Evalidated
UMLSC4755310Evalidated

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

1 record
TypeClassValueAreaQualificationValidationSource
Point prevalenceUnknown—WorldwideClass onlyValidatedORPHANET

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

6

HPO phenotypes

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

7

Sources for this card