raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:1150

Arthrogryposis multiplex congenita-whistling face syndrome

Synonyms: Illum syndrome

Type
Malformation syndrome
Group
Disorder
Inheritance
Autosomal recessive
Age of onset
Antenatal, Neonatal
Status
active

An extremely rare type of arthrogryposis multiplex congenita characterized by the combination of multiple joint contractures with movement limitation, microstomia with a whistling appearance of the mouth that may cause feeding, swallowing, and speech difficulties, a distinctive expressionless facies, severe developmental delay, central and autonomous nervous system dysfunction (excessive salivation, temperature instability, myoclonic epileptic fits, bradycardia), occasionally Pierre-Robin sequence, and lethality generally occurring during the first months of life. Arthrogryposis multiplex congenita-whistling face syndrome has been suggested to be a fetal akinesia deformation sequence.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enArthrogryposis multiplex congenita-whistling face syndromeIllum syndrome
frSyndrome d'arthrogrypose multiple congénitale-face de siffleurSyndrome d'Illum
deArthrogryposis multiplex congenita-Whistling-face-SyndromIllum-Syndrom
esSíndrome de artrogriposis múltiple congénita-cara de silbidoSíndrome de Illum
itArtrogriposi multipla congenita - faccia da fischiatore
nlArthrogryposis multiplex congenita - fluitmond-syndroomSyndroom van Illum
ptSíndrome de artrogripose múltipla congénita-face em assobioSíndrome Illum
plArteogrypoza - gwiżdżąca twarzZespół Illum
csSyndrom zahrnující arthrogryposis multiplex congenita a whistling faceIllumův syndrom
ukСиндром множинного вродженого артрогрипозу та свистячого обличчяСиндром Іллюма
zh先天性多发关节弯曲-吹口哨面容综合征Illum综合征
trArtrogripozis multipleks konjenita Whistling-Face sendromuİllum sendromu

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM208155Evalidated
ICD-10Q87.8NTBTattributedvalidated
ICD-11LD26.41NTBTindexvalidated
MONDO0008825Evalidated
MeSHC538401Evalidated
UMLSC1859711Evalidated
GARD792Evalidated

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 (3):

No children.

4

Genes

0 direct

Orphanet records no gene directly on this code.

5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families10 casesWorldwideCase(s)ValidatedORPHANET
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET

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

24 annotations · validated 2016-06-01
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0003043Abnormality of the shoulder
HP:0001181Adducted thumb
HP:0000581Blepharophimosis
HP:0000293Full cheeks
HP:0001252Hypotonia
HP:0001387Joint stiffness
HP:0000160Narrow mouth
HP:0001561Polyhydramnios
HP:0000358Posteriorly rotated ears
HP:0001250Seizure
HP:0011344Severe global developmental delay
HP:0004322Short stature
HP:0000233Thin vermilion border
HP:0000346Whistling appearance
Frequent (79-30%)
HP:0002353EEG abnormality
HP:0001511Intrauterine growth retardation
HP:0000347Micrognathia
HP:0000201Pierre-Robin sequence
Occasional (29-5%)
HP:0001231Abnormal fingernail morphology
HP:0000174Abnormal palate morphology
HP:0000366Abnormality of the nose
HP:0010751Chin dimple
HP:0002714Downturned corners of mouth
HP:0000364Hearing abnormality

Run the differential on the 12 obligate / very frequent terms

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Sources for this card