raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:2274

Ichthyosis-hepatosplenomegaly-cerebellar degeneration syndrome

historical

Synonyms: Dykes-Marks-Harper syndrome

Type
Disease
Group
Disorder
Inheritance
Autosomal recessive, X-linked recessive
Age of onset
Infancy, Neonatal
Status
historical

A rare genetic neurologic syndrome characterized by the triad of ichthyosis, hepatosplenomegaly and late-onset cerebellar ataxia that presents with progressive dysarthria, unsteadiness of gait. Ichthyosis usually manifests with marked hyperkeratosis, affecting the hands, arms and legs, primarily on the extensor surfaces of the limbs. The severity of ataxia and disability of limb movements are variable. Upward vertical gaze palsy, sluggish reflexes and impaired memory may also be present. There have been no further descriptions in the literature since 1979.

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Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enIchthyosis-hepatosplenomegaly-cerebellar degeneration syndromeDykes-Marks-Harper syndrome
frSyndrome d'ichtyose-hépatosplénomégalie-dégénérescence cérébelleuseSyndrome de Dykes-Marks-Harper
deIchthyose-Hepatosplenomegalie-zerebelläre Degeneration-SyndromDykes-Markes-Harper-Syndrom
esSíndrome de ictiosis-hepatoesplenomegalia-degeneración cerebelosa
itIttiosi - epatosplenomegalia - degenerazione cerebellareSindrome di Dykes-Markes-Harper
nlIchthyosis - hepatosplenomegalie - cerebellaire degeneratie-syndroomSyndroom van Dykes-Markes-Harper
ptSíndrome de ictiose-hepatoesplenomegalia-degenerescência cerebelosaSíndrome Dykes-Markes-Harper
plRybia łuska - powiększenie wątroby i śledziony - zwyrodnienie móżdżkuZespół Dykesa, Markesa i Harpera
csSyndrom zahrnující ichtyózu, hepatosplenomegalii a cerebelární degeneraciDykesův-Markesův-Harperův syndrom · Dykes-Markes-Harperův syndrom
ukСиндром іхтіозу-гепатоспленомегалії-мозочкової дегенераціїСиндром Дайкса-Маркса-Харпера
zh鱼鳞病-肝脾肿大-小脑退化综合征Dykes-Marks-Harper综合征
trİktiyoz-hepatosplenomegali-serebellar dejenerasyon sendromuDykes-Marks-Harper sendromu

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM242520Evalidated
ICD-10Q87.8NTBTattributedvalidated
MONDO0009445Evalidated
MeSHC535727Evalidated
UMLSC1275088Evalidated
GARD1993Evalidated

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

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Classification

Preferential parent (Orphanet linearisation):

Parents in the classifications (2):

No children.

4

Genes

0 direct

Orphanet records no gene directly on this code.

5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families2 casesWorldwideCase(s)Validated444432[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET_444432[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.

6

HPO phenotypes

8 annotations · validated 2017-11-08
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0002167Abnormality of speech or vocalization
HP:0001251Ataxia
HP:0000726Dementia
HP:0001288Gait disturbance
HP:0002240Hepatomegaly
HP:0001265Hyporeflexia
HP:0008064Ichthyosis
HP:0001744Splenomegaly
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Sources for this card