raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:1129

Arachnodactyly-abnormal ossification-intellectual disability syndrome

Synonyms: Kosztolanyi syndrome

Type
Malformation syndrome
Group
Disorder
Inheritance
Unknown
Age of onset
Infancy, Neonatal
Status
active

A multiple congenital developmental anomalies syndrome characterized by arachnodactyly of fingers and toes associated with craniofacial dysmorphism (including abnormal cranial ossification, frontal bossing, flat calvaria, shallow deformed orbits resulting in exophthalmos, midface hypoplasia and micrognathia), feeding difficulties in infancy, infantile muscular hypotonia, and developmental delay leading to intellectual disability.

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Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enArachnodactyly-abnormal ossification-intellectual disability syndromeKosztolanyi syndrome
frSyndrome d'arachnodactylie-ossification anormale-déficience intellectuelleSyndrome de Kosztolanyi
deArachnodaktylie-Ossifikationsstörungen-Intelligenzminderung-SyndromKosztolanyi-Syndrom
esSíndrome de aracnodactilia-osificación anómala-discapacidad intelectualSíndrome de Kosztolanyi
itSindrome aracnodattilia-anomalia dell'ossificazione-disabilità intellettivaSindrome di Kosztolanyi
nlArachnodactylie - abnormale ossificatie - intellectuele achterstand-syndroomSyndroom van Kosztolanyi
ptSíndrome de aracnodactilia-defeitos da ossificação-perturbação do desenvolvimento intelectualSíndrome Kosztolanyi
plArachnodaktylia - nieprawidłowa osteogeneza - niepełnosprawność intelektualnaZespół Kosztolanyi
csSyndrom zahrnující arachnodaktylii, abnormální osifikaci a mentální retardaciKosztolanyiův syndrom
ukСиндром арахнодактилії-аномального окостеніння-інтелектуальної недостатностіСиндром Коштолані
zh蜘蛛指畸形-异常骨化-智力障碍综合征Kosztolanyi 综合征
trAraknodaktili-anormal ossifikasyon-zihinsel yetersizlik sendromuKosztolanyi sendromu

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
ICD-10Q87.8NTBTattributedvalidated
MONDO0015234Evalidated
MeSHC537024Evalidated
UMLSC2931398Evalidated
GARD381Evalidated

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 (4):

No children.

4

Genes

0 direct

Orphanet records no gene directly on this code.

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Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families5 casesWorldwideCase(s)Validated8533819[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET_8533819[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

15 annotations · validated 2018-01-08
HPOTerm (as annotated by Orphanet)Diagnostic
Frequent (79-30%)
HP:0010565Aplasia/Hypoplasia of the Epiglottis
HP:0001166Arachnodactyly
HP:0000270Delayed cranial suture closure
HP:0000494Downslanted palpebral fissures
HP:0011968Feeding difficulties
HP:0008947Floppy infant
HP:0002007Frontal bossing
HP:0001263Global developmental delay
HP:0001249Intellectual disability
HP:0000347Micrognathia
HP:0011800Midface retrusion
HP:0000586Shallow orbits
HP:0003196Short nose
HP:0010539Thin calvarium
Occasional (29-5%)
HP:0002104Apnea

Annotation source: 8533819[PMID]

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Sources for this card