raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:2850

Alopecia-intellectual disability syndrome

Synonyms: Perniola-Krajewska-Carnevale syndrome

Type
Disease
Group
Disorder
Inheritance
Autosomal recessive
Age of onset
Neonatal
Status
active

An extremely rare genetic syndromic intellectual disability described in less than 20 families to date and characterized by total or partial alopecia associated with intellectual deficit. The syndrome can be associated with other anomalies such as seizures, sensorineural hearing loss, delayed psychomotor development, and/or hypertonia.

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Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enAlopecia-intellectual disability syndromePerniola-Krajewska-Carnevale syndrome
frSyndrome de Perniola-Krajewska-CarnevaleSyndrome d'alopécie-déficience intellectuelle
deAlopezie-Intelligenzminderung-SyndromPerniola-Krajewska-Carnevale-Syndrom
esSíndrome de alopecia-discapacidad intelectualSíndrome de Perniola-Krajewska-Carnevale
itSindrome alopecia-disabilità intellettivaSindrome di Perniola-Krajewska-Carnevale
nlAlopecie - intellectuele achterstand-syndroomSyndroom van Perniola-Krajewska-Carnevale
ptSíndrome de alopecia-perturbação do desenvolvimento intelectualSíndrome Perniola-Krajewska-Carnevale
plZespół łysienie - niepełnosprawność intelektualnaZespół Perniola, Krajewskiej i Carnevale
csSyndrom zahrnující alopecii a mentální retardaciPerniolův-Krajewské-Carnevaleův syndrom · Perniola-Krajewska-Carnevaleův syndrom
ukСиндром алопеції та інтелектуальної недостатностіСиндром Перніоли-Краєвської-Карневале
zh脱发-智力障碍综合征Perniola-Krajewska-Carnevale综合征
trAlopesi-zihinsel yetersizlik sendromuPerniola-Krajewska-Carnevale sendromu

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM203650Evalidated
OMIM610422BTNTvalidated
OMIM613930BTNTvalidated
OMIM618840BTNTvalidated
ICD-10Q87.8NTBTattributedvalidated
MONDO0008756Evalidated
MeSHC536660Evalidated
UMLSC2931280Evalidated
GARD612Evalidated

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 (3):

No children.

Codes that Orphanet moved or referred to this one:

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Genes

3 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
AHSGDisease-causing germline mutation(s) inAssessedHGNC:349ENSG000001451921386803q27.3alpha 2-HS glycoprotein28054173[PMID]
ITGB6Disease-causing germline mutation(s) inAssessedHGNC:6161ENSG000001152211475582q24.2integrin subunit beta 626695873[PMID]
LSSDisease-causing germline mutation(s) inAssessedHGNC:6708ENSG0000016028560090921q22.3lanosterol synthase30723320[PMID]
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Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET_28054173[PMID]
Cases/families15 familiesWorldwideFamily(ies)Validated18616779[PMID]_28054173[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

26 annotations · validated 2016-06-01
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0001596Alopecia
HP:0100840Aplasia/Hypoplasia of the eyebrow
HP:0002750Delayed skeletal maturation
HP:0000365Hearing impairment
HP:0001252Hypotonia
HP:0001249Intellectual disability
HP:0000252Microcephaly
HP:0002231Sparse body hair
HP:0002209Sparse scalp hair
Frequent (79-30%)
HP:0011842Abnormality of skeletal morphology
HP:0001156Brachydactyly
HP:0002353EEG abnormality
HP:0001510Growth delay
HP:0000815Hypergonadotropic hypogonadism
HP:0008064Ichthyosis
HP:0000613Photophobia
HP:0001250Seizure
HP:0200012Short corpus callosum
HP:0004322Short stature
HP:0008070Sparse hair
HP:0001171Split hand
Occasional (29-5%)
HP:0005105Abnormal nasal morphology
HP:0001371Flexion contracture
HP:0000962Hyperkeratosis
HP:0000400Macrotia
HP:0002650Scoliosis

Run the differential on the 9 obligate / very frequent terms

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Sources for this card