raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:85335

Fried syndrome

Type
Malformation syndrome
Group
Disorder
Inheritance
X-linked recessive
Age of onset
Infancy, Neonatal
Status
active

Fried syndrome is a rare X-linked mental retardation (XLMR) syndrome characterized by psychomotor delay, intellectual deficit, hydrocephalus, and mild facial anomalies.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enFried syndrome
frSyndrome de Fried
deFried-Syndrom
esSíndrome de Fried
itSindrome di Fried
nlSyndroom van Fried
ptSíndrome Fried
plZespół Frieda
csFriedův syndrom
ukСиндром Фріда
zhFried综合征
trFried sendromu

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM304340NTBTvalidated
ICD-10Q87.8NTBTattributedvalidated
MONDO0019428Evalidated
UMLSC4305134Evalidated

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 (2):

No children.

4

Genes

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
AP1S2Disease-causing germline mutation(s) inAssessedHGNC:560ENSG00000182287300629Xp22.2adaptor related protein complex 1 subunit sigma 217617514[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET_5054319[PMID]
Cases/families1 familiesWorldwideFamily(ies)Validated5054319[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

21 annotations · validated 2016-06-01
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0002514Cerebral calcification
HP:0001263Global developmental delay
HP:0000238Hydrocephalus
HP:0001252Hypotonia
HP:0002342Intellectual disability, moderate
HP:0002465Poor speech
HP:0001264Spastic diplegia
Frequent (79-30%)
HP:0000718Aggressive behavior
HP:0000729Autistic behavior
HP:0000280Coarse facial features
HP:0001288Gait disturbance
HP:0000218High palate
HP:0000276Long face
HP:0000400Macrotia
HP:0002650Scoliosis
HP:0000322Short philtrum
Occasional (29-5%)
HP:0001317Abnormal cerebellum morphology
HP:0000587Abnormal optic nerve morphology
HP:0000365Hearing impairment
HP:0003202Skeletal muscle atrophy
HP:0002684Thickened calvaria

Run the differential on the 7 obligate / very frequent terms

Annotation source: 9222959[PMID]_18428203[PMID]

7

Sources for this card