raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:79113

Mandibulofacial dysostosis-microcephaly syndrome

Synonyms: MFDM syndrome · Mandibulofacial dysostosis, Guion-Almeida type

Type
Malformation syndrome
Group
Disorder
Inheritance
Autosomal dominant
Age of onset
Neonatal
Status
active

A rare genetic, multiple congenital malformation syndrome characterized by malar and mandibular hypoplasia, microcephaly, ear malformations with associated conductive hearing loss, distinctive facial dysmorphism (with significantly overlap to Treacher Collins syndrome), developmental delay, and intellectual disability.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enMandibulofacial dysostosis-microcephaly syndromeMFDM syndrome · Mandibulofacial dysostosis, Guion-Almeida type
frSyndrome de dysostose mandibulo-faciale-microcéphalieSyndrome MFDM
deMandibulo-faziale Dysostose-Mikrozephalie-SyndromKleinwuchs - Intelligenzminderung - mandibulo-faziale Dysostose - Mikrozephalie - Gaumenspalte · MFDM-Syndrom · Mandibulo-faziale Dysostose Typ Guion-Almeida
esSíndrome de disostosis mandibulofacial-microcefaliaDisostosis mandibulofacial tipo Guion-Almeida · Síndrome MFDM
itSindrome disostosi mandibolofacciale-microcefaliaDisostosi mandibolofacciale, tipo Guion-Almeida · Ritardo della crescita - deficit cognitivo - disostosi mandibolofacciale - microcefalia - palatoschisi · Sindrome MFDM
nlMandibulofaciale dysostose - microcefalie-syndroomMFDM-syndroom · Mandibulofaciale dysostose, Guion-Almeida-type
ptSíndrome de disostose mandibulo-facial-microcefaliaDisostose mandibulo-facial, tipo Guion-Almeida · Síndrome MFDM
plDyzostoza żuchwowo-twarzowa, typ Guiona i AlmeidaMFDM syndrome · Zespół MFDM
csSyndrom zahrnující mandibulofaciální dysostózu a mikrocefaliiMFDM syndrom · Mandibulofaciální dysostóza, Guion-Almeidové typ · Syndrom zahrnující opožděný růst, mentální retardaci, mandibulofaciální dysostózu, mikrocefalii a rozštěp patra
ukСиндром щелепно-лицевого дизостозу-мікроцефаліїМандибулофаціальний дизостоз, тип Гійона-Алмейда · Синдром MFDM
zh颌面部发育不良-小头畸形综合征颌面骨发育不良,Guion-Almeida型
trMandibulofasiyal disostoz-mikrosefali sendromuMFDM sendromu · Mandibulofasiyal dizostoz, Guion-Almeida tipi

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM610536Evalidated
ICD-10Q87.0NTBTattributedvalidated
MONDO0012516Evalidated
MeSHC537405Evalidated
UMLSC1864652Evalidated
GARD10056Evalidated

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 (6):

No children.

4

Genes

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
EFTUD2Disease-causing germline mutation(s) inAssessedHGNC:30858ENSG0000010888360389217q21.31elongation factor Tu GTP binding domain containing 222305528[PMID]_24999515[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families107 casesWorldwideCase(s)Validated26507355[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET_26507355[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

30 annotations · validated 2016-06-01
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0009738Abnormality of the antihelix
HP:0000356Abnormality of the outer ear
HP:0011268Absent tragus
HP:0000175Cleft palate
HP:0000750Delayed speech and language development
HP:0011968Feeding difficulties
HP:0000327Hypoplasia of the maxilla
HP:0001249Intellectual disability
HP:0000369Low-set ears
HP:0000272Malar flattening
HP:0000347Micrognathia
HP:0008551Microtia
HP:0008609Morphological abnormality of the middle ear
HP:0000384Preauricular skin tag
HP:0005484Secondary microcephaly
HP:0003196Short nose
HP:0004322Short stature
HP:0000243Trigonocephaly
HP:0011272Underdeveloped tragus
HP:0000582Upslanted palpebral fissure
Frequent (79-30%)
HP:0000191Accessory oral frenulum
HP:0000413Atresia of the external auditory canal
HP:0000286Epicanthus
HP:0009748Large earlobe
HP:0000396Overfolded helix
HP:0001177Preaxial hand polydactyly
HP:0000506Telecanthus
Occasional (29-5%)
HP:0001631Atrial septal defect
HP:0000405Conductive hearing impairment
HP:0001250Seizure

Run the differential on the 12 obligate / very frequent terms

7

Sources for this card