raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:572768

Microcephaly-micromelia syndrome

Synonyms: MIMIS

Type
Clinical subtype
Group
Subtype of disorder
Inheritance
Autosomal recessive
Age of onset
Antenatal
Status
active

A rare genetic multiple congenital anomalies/dysmorphic syndrome characterized by severe intrauterine growth retardation, profound microcephaly, dysmorphic craniofacial features (such as craniosynostosis and distinctive facial appearance with short palpebral fissures, broad and beaked nose, microstomia, micrognathia, low-set ears, and short neck), and variable malformations of the limbs, especially the arms. Cardiac, gastrointestinal, and genitourinary anomalies have also been reported. Brain imaging shows gray and white matter abnormalities and hypoplastic or absent corpus callosum. The disease is commonly fatal in the fetal to neonatal period due to respiratory failure.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enMicrocephaly-micromelia syndromeMIMIS
frSyndrome de microcéphalie-micromélie= en
deMikrozephalie-Mikromelie-Syndrom= en
esSíndrome de microcefalia-micromelia
itSindrome da microcefalia e micromelia= en
nlMicrocefalie - micromelie-syndroom= en
ptSíndrome de microcefalia-micromelia
plZespół małogłowia i mikromelii= en
csSyndrom zahrnující mikrocefalii a mikromelii= en
ukСиндром мікроцефалії-мікромелії= en
zh小头畸形-四肢短小综合征= en
trMikrosefali-mikromeli sendromu= en

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM251230Evalidated
ICD-10Q87.1NTBTattributedvalidated
MONDO0009619Evalidated
MeSHC565382Evalidated
UMLSC1855079Evalidated

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 (1):

No children.

4

Genes

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
DONSONDisease-causing germline mutation(s) inAssessedHGNC:2993ENSG0000015914761142821q22.11DNA replication fork stabilization factor DONSON28191891[PMID]_28630177[PMID]_31191207[PMID]_31320746[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families32 casesWorldwideCase(s)Validated7468660[PMID]_28630177[PMID]_31191207[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET_31191207[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

Orphanet has no HPO annotation for this code in this release.

7

Sources for this card