raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:99742

Amish lethal microcephaly

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

A very rare syndrome characterized by extreme microcephaly and early death, within the first year.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enAmish lethal microcephaly
frMicrocéphalie létale type Amish
deMikrozephalie, letale, Typ Amish
esMicrocefalia letal tipo Amish
itMicrocefalia letale, tipo Amish
nlLetale microcefalie, Amish-type
ptMicrocefalia, tipo Amish
plŚmiertelna mikrocefalia Amiszów
csLetální mikrocefalie Amišů
ukЛетальна мікроцефалія амішів
zh阿米什致命性小头畸形
trAmish letal mikrosefalisi

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM607196Evalidated
ICD-10Q02NTBTattributedvalidated
ICD-11LA05.0NTBTattributedvalidated
MONDO0011790Evalidated
MeSHC538247Evalidated
UMLSC1846648Evalidated
GARD8606Evalidated

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
SLC25A19Disease-causing germline mutation(s) inAssessedHGNC:14409ENSG0000012545460652117q25.1solute carrier family 25 member 1920301539[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Prevalence at birth>1 / 1000200 / 100 000Specific populationValue and classValidated12376931[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET_20301539[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

25 annotations · validated 2016-06-01
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0001320Cerebellar vermis hypoplasia
HP:0001522Death in infancy
HP:0011968Feeding difficulties
HP:0000737Irritability
HP:0001942Metabolic acidosis
HP:0000252Microcephaly
HP:0000347Micrognathia
HP:0000648Optic atrophy
HP:0001992Organic aciduria
HP:0011344Severe global developmental delay
HP:0000340Sloping forehead
Frequent (79-30%)
HP:0001274Agenesis of corpus callosum
HP:0001252Hypotonia
HP:0002509Limb hypertonia
HP:0001339Lissencephaly
HP:0000939Osteoporosis
HP:0002414Spina bifida
HP:0005968Temperature instability
HP:0002119Ventriculomegaly
Occasional (29-5%)
HP:0002069Bilateral tonic-clonic seizure
HP:0000185Cleft soft palate
HP:0001558Decreased fetal movement
HP:0004331Decreased skull ossification
HP:0002240Hepatomegaly
HP:0001376Limitation of joint mobility

Run the differential on the 11 obligate / very frequent terms

Annotation source: 20301539[PMID]_20583149[PMID]

7

Sources for this card