raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:3339

Oculoectodermal syndrome

Synonyms: Aplasia cutis congenita-epibulbar dermoids syndrome · Toriello Lacassie Droste syndrome

Type
Malformation syndrome
Group
Disorder
Inheritance
Not applicable
Age of onset
Infancy, Neonatal
Status
active

A rare ectodermal dysplasia syndrome characterized by aplasia cutis congenita and epibulbar dermoids. Affected individuals present mostly with multiple, asymmetrically distributed, hairless, non scarring, atrophic, congenital scalp lesions and unilateral or bilateral epibulbar dermoids with or without other ocular anomalies (including strabismus, nystagmus, microcornea, and microphthalmia). Eyelid coloboma, acrochordons, linear/cutaneous hyperpigmentation, mostly following Blaschko lines, can also be present. Giant cell granulomas of the jaws and nonossifying fibromas of the long bones are commonly observed in individuals starting from 5 years old. Additional and variable clinical features including growth failure, neurodevelopmental delay, epilepsy, learning difficulties, behavioral abnormalities, lymphedema, macrocephaly, cardiovascular defects, facial asymmetry and mild dysmorphism were reported in some patients.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enOculoectodermal syndromeAplasia cutis congenita-epibulbar dermoids syndrome · Toriello Lacassie Droste syndrome
frSyndrome oculo-ectodermiqueSyndrome d'aplasie cutanée congénitale-dermoïdes épibulbaires · Syndrome de Toriello-Lacassie-Droste
deOkulo-ekto-dermales SyndromSyndrom der Aplasia cutis congenita mit epibulbärem Dermoid · Toriello-Lacassie-Droste-Syndrom
esSíndrome oculoectodérmicoSíndrome de Toriello Lacassie Droste · Síndrome de aplasia cutis congénita-dermoides epibulbar
itSindrome oculo-ectodermicaAplasia cutanea congenita - dermoidi epibulbari · Sindrome aplasia cutanea congenita-dermoidi epibulbari
nlOculo-ectodermaal syndroomAplasia cutis congenita - epibulbaire dermoïden-syndroom · Syndroom van Toriello Lacassie Droste
ptSíndrome óculoectodérmicoSíndrome Toriello Lacassie Droste · Síndrome de aplasia cutis congénita-dermoides epibulbar
plZespół Toriello, Lacassie i DrosteWrodzona aplazja skóry - guzek nagałkowy · Zespół oczno-ektodermalny
csToriellové-Lacassieův-Drosteův syndromSyndrom zahrnující aplasia cutis congenita a epibulbární dermoidy · Okuloektodermální syndrom · Toriello-Lacassie-Drosteův syndrom
ukОкулоектодермальний синдромСиндром вродженої аплазія шкіри - епібульбарних дермоїдів
zhToriello-Lacassie-Droste 综合征先天性表皮发育不良-眼球外层皮样囊肿综合征
trToriello-Lacassie-Droste sendromuOküloektodermal sendrom · Aplazi kutis konjenita-epibulbar dermoid sendromu

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM600268Evalidated
ICD-10Q82.4NTBTattributedvalidated
ICD-11LD27.0YNTBTindexvalidated
MONDO0010854Evalidated
MeSHC563969Evalidated
UMLSC1838329Evalidated
GARD10366Evalidated

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
KRASDisease-causing somatic mutation(s) inAssessedHGNC:6407ENSG0000013370319007012p12.1KRAS proto-oncogene, GTPase25808193[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families19 casesWorldwideCase(s)Validated25251940[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET_25251940[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

36 annotations · validated 2017-06-27
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0000502Abnormal conjunctiva morphology
HP:0012639Abnormal nervous system morphology
HP:0001331Absent septum pellucidum
HP:0001274Agenesis of corpus callosum
HP:0008065Aplasia/Hypoplasia of the skin
HP:0007440Generalized hyperpigmentation
HP:0001140Limbal dermoid
Frequent (79-30%)
HP:0030680Abnormal cardiovascular system morphology
HP:0001626Abnormality of the cardiovascular system
HP:0000598Abnormality of the ear
HP:0000069Abnormality of the ureter
HP:0002251Aganglionic megacolon
HP:0000463Anteverted nares
HP:0000581Blepharophimosis
HP:0001156Brachydactyly
HP:0000286Epicanthus
HP:0001508Failure to thrive
HP:0011968Feeding difficulties
HP:0001510Growth delay
HP:0000365Hearing impairment
HP:0001252Hypotonia
HP:0008749Laryngeal hypoplasia
HP:0000256Macrocephaly
HP:0001561Polyhydramnios
HP:0000520Proptosis
HP:0003196Short nose
HP:0004279Short palm
HP:0012745Short palpebral fissure
HP:0000486Strabismus
HP:0000506Telecanthus
Occasional (29-5%)
HP:0001999Abnormal facial shape
HP:0000014Abnormality of the bladder
HP:0000036Abnormality of the penis
HP:0000039Epispadias
HP:0000625Eyelid coloboma
HP:0000047Hypospadias

Run the differential on the 7 obligate / very frequent terms

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Sources for this card