raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:85286

X-linked intellectual disability, Shashi type

Synonyms: Syndromic X-linked intellectual disability type 11

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

X-linked intellectual disability, Shashi type is characterised by moderate intellectual deficit, obesity, macroorchidism and a characteristic facies (large ears, a prominent lower lip and puffy eyelids). It has been described in nine boys from two families. Transmission is X-linked and the causative gene has been localised to the q21.3-q27 region of the X chromosome.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enX-linked intellectual disability, Shashi typeSyndromic X-linked intellectual disability type 11
frDéficience intellectuelle liée à l'X type ShashiDéficience intellectuelle liée à l'X syndromique type 11
deIntelligenzminderung, X-chromosomale, Typ ShashiIntelligenzminderung, X-chromosomale, syndromale, Typ 11
esDiscapacidad intelectual ligada al cromosoma X tipo ShashiDiscapacidad intelectual sindrómica ligada al cromosoma X tipo 11
itDisabilità intellettiva legata all'X, tipo ShashiDisabilità intellettiva sindromica legato all'X, tipo 11
nlX-gebonden intellectuele achterstand, Shashi-typeSyndromale X-gebonden intellectuele achterstand type 11
ptPerturbação do desenvolvimento intelectual ligada ao X, tipo ShashiPerturbação do desenvolvimento intelectual sindromática ligada ao X tipo 11
plNiepełnosprawność intelektualna typu Shashi sprzężona z chromosomem XSyndromiczna niepełnosprawność intelektualna sprzężona z chromosomem X typu 11
csX-vázaná mentální retardace, Shashiové typSyndromická X-vázaná mentální retardace, typ 11
ukХ-зчеплена розумова відсталість, тип ШашіСиндромальна Х-зчеплена розумова відсталість, тип 11
zhX连锁智力障碍,Shashi型综合征性X-连锁智力障碍11型
trX'e bağlı zihinsel yetersizlik, Shashi tipiSendromik X'e bağlı zihinsel yetersizlik tip 11

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM300238Evalidated
ICD-10Q87.8NTBTattributedvalidated
ICD-11LD90NTBTattributedvalidated
MONDO0010277Evalidated
UMLSC4305085Evalidated
GARD4119Evalidated

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
RBMXDisease-causing germline mutation(s) inAssessedHGNC:9910ENSG00000147274300199Xq26.3RNA binding motif protein X-linked25256757[PMID]_34260915[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families9 casesWorldwideCase(s)Validated12605440[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET_12605440[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

12 annotations · validated 2016-06-01
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0000581Blepharophimosis
HP:0000414Bulbous nose
HP:0000280Coarse facial features
HP:0000750Delayed speech and language development
HP:0000232Everted lower lip vermilion
HP:0002342Intellectual disability, moderate
HP:0000053Macroorchidism
HP:0000400Macrotia
HP:0001513Obesity
HP:0100540Palpebral edema
HP:0000336Prominent supraorbital ridges
Occasional (29-5%)
HP:0001250Seizure

Run the differential on the 11 obligate / very frequent terms

Annotation source: 10677307[PMID]

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Sources for this card