raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:352682

Cobblestone lissencephaly without muscular or ocular involvement

Synonyms: Cobblestone lissencephaly without muscular or eye involvement · Lissencephaly type 2 without muscular or eye involvement · Lissencephaly type 2 without muscular or ocular involvement

Type
Disease
Group
Disorder
Inheritance
Autosomal recessive
Age of onset
Childhood, Infancy
Status
active

A rare, genetic, cobblestone lissencephaly disease characterized by the presence of a constellation of brain malformations, including cortical gyral and sulcus anomalies, white matter signal abnormalities, cerebellar dysplasia and brainstem hypoplasia, existing alone or in conjunction with minimal muscular and ocular abnormalities, typically manifesting with severe developmental delay, increased head circumference, hydrocephalus and seizures.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enCobblestone lissencephaly without muscular or ocular involvementCobblestone lissencephaly without muscular or eye involvement · Lissencephaly type 2 without muscular or eye involvement · Lissencephaly type 2 without muscular or ocular involvement
frLissencéphalie pavimenteuse sans atteinte musculaire ou oculaireLissencéphalie type 2 sans atteinte musculaire ou oculaire
deCobblestone-Lissenzephalie ohne muskuläre oder okuläre BeteiligungCobblestone-Lissenzephalie ohne Beteiligung der Muskeln oder Augen · Lissenzephalie Typ 2 ohne Beteiligung der Muskeln oder Augen
esLisencefalia en empedrado sin afectación muscular u ocularLisencefalia en empedrado sin afectación muscular o del ojo · Lisencefalia tipo 2 sin afectación muscular o del ojo · Lisencefalia tipo 2 sin afectación muscular u ocular
itLissencefalia con aspetto acciottolato senza interessamento muscolare o oculareLissencefalia con aspetto ciottolato senza coinvolgimento muscolare o dell'occhio · Lissencefalia tipo 2 senza coinvolgimento muscolare o dell'occhio · Lissencefalia tipo 2 senza coinvolgimento oculare o muscolare
nlCobblestone-lissencefalie zonder musculaire of oculaire betrokkenheidCobblestone-lissencefalie zonder betrokkenheid van spier of oog · Lissencefalie type 2 zonder betrokkenheid van spier of oog · Lissencefalie type 2 zonder musculaire of oculaire betrokkenheid
ptLisencefalia em pedra de calçada sem envolvimento muscular ou ocular
plLizencefalia typu kostki brukowej bez zaangażowanie mięśni i oczuLizencefalia typu 2 bez zaangażowania mięśni lub oczu · Lizencefalia typu 2 bez zaangażowania mięśni lub oczu · Lizencefalia typu kostki brukowej bez zaangażowanie mięśni lub oczu
csCobblestone lisencefalie bez postižení svalů nebo očíLissencefalie s obrazem kočičích hlav bez postižení svalů nebo očí · Lissencefalie typ 2 bez postižení svalů nebo očí · Cobblestone dysplázie bez postižení svalů nebo očí
ukБруківкова лісенцефалія без мязового або очного ураженняБруківкова лісенцефалія без ураження мязів та очей · Лісенцефалія 2 типу без ураження мязів та очей · Лісенцефалія 2 типу без мязового або очного ураження
zh无肌肉或眼受累的鹅卵石样无脑回畸形无肌肉或眼受累的鹅卵石样无脑回畸形
trKas veya oküler tutulum olmayan Arnavut kaldırımlı lizensefaliKas veya göz tutulumu ile seyretmeyen tip 2 lisensefali · Kas veya oküler tutulum ile seyretmeyen tip 2 lisensefali · Kas veya göz tutulumu ile seyretmeyen arnavut kaldırımlı lisensefali

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM615191BTNTvalidated
OMIM617255NTBTvalidated
ICD-10Q04.3NTBTattributedvalidated
MONDO0014077Evalidated
UMLSC5191415Evalidated

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

2 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
LAMB1Disease-causing germline mutation(s) inAssessedHGNC:6486ENSG000000911361502407q31.1laminin subunit beta 123472759[PMID]
TMTC3Disease-causing germline mutation(s) inAssessedHGNC:26899ENSG0000013932461721812q21.32transmembrane O-mannosyltransferase targeting cadherins 327773428[PMID]_28973161[PMID]_33293961[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families6 casesWorldwideCase(s)Validated23472759[PMID]_25925986[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET_23472759[PMID]_25925986[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

13 annotations · validated 2020-06-18
HPOTerm (as annotated by Orphanet)Diagnostic
Frequent (79-30%)
HP:0002500Abnormal cerebral white matter morphology
HP:0012447Abnormal myelination
HP:0001321Cerebellar hypoplasia
HP:0032398Dysgyria
HP:0002282Gray matter heterotopia
HP:0000238Hydrocephalus
HP:0002365Hypoplasia of the brainstem
HP:0002085Occipital encephalocele
HP:0000648Optic atrophy
HP:0011344Severe global developmental delay
HP:0007260Type II lissencephaly
Occasional (29-5%)
HP:0001250Seizure
Excluded (0%)
HP:0003457EMG abnormality

Annotation source: 23472759[PMID]

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Sources for this card