raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:500144

Early-onset progressive encephalopathy-hearing loss-pons hypoplasia-brain atrophy syndrome

Synonyms: Early-onset progressive encephalopathy-brain atrophy-spasticity syndrome · PEBAS

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

A rare, genetic neurological disorder characterized by early-onset severe global developmental delay with regression, congenital or acquired microcephaly, hearing loss, truncal hypotonia, appendicular spasticity, and dystonia and/or myoclonus.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enEarly-onset progressive encephalopathy-hearing loss-pons hypoplasia-brain atrophy syndromeEarly-onset progressive encephalopathy-brain atrophy-spasticity syndrome · PEBAS
frSyndrome à début précoce d'encéphalopathie progressive-surdité-hypoplasie du pont-atrophie cérébralePEBAS · Syndrome à début précoce d'encéphalopathie progressive-atrophie cérébrale-spasticité
deFrüh-beginnende progressive Enzephalopathie-Hörverlust-Ponshypoplasie-Hirnatrophie-SyndromSyndrom der früh einsetzenden progressiven Enzephalopathie mit Hirnatrophie und Spastik · PEBAS
esSíndrome de encefalopatía progresiva-hipoacusia-hipoplasia pontina-atrofia cerebral de inicio precozPEBAS · Síndrome de encefalopatía progresiva-atrofia cerebral-espasticidad de inicio precoz
itSindrome encefalopatia progressiva a esordio precoce-ipoacusia-ipoplasia del ponte-atrofia cerebralePEBAS · Sindrome da encefalopatia progressiva ad esordio precoce-atrofia cerebrale-spasticità
nlVroeg optredende progressieve encefalopathie - gehoorverlies - hypoplasie van pons - hersenatrofie-syndroomPEBAS · Vroeg optredende progressieve encefalopathie - hersenatrofie - spasticiteit-syndroom
ptSíndrome de encefalopatia progressiva de início precoce-perda auditiva-hipoplasia pontina-atrofia cerebralPEBAS · Síndrome de encefalopatia progressiva de início precoce-atrofia cerebral-espasticidade
plZespół wczesnej i postępującej encefalopatii, niedosłuchu, hipoplazji mostu i atrofii mózguZespół postępującej encefalopatii o wczesnym początku, utraty słuchu, hipoplazji mostu i zaniku mózgu
csSyndrom zahrnující progresivní encefalopatii, ztrátu sluchu, hypoplázii pontu a atrofii mozku s časným nástupem= en
ukСиндром ранньої прогресуючої енцефалопатії-втрати слуху-гіпоплазії мозочка-атрофії мозкуСиндром ранньої прогресуючої енцефалопатії - атрофії-спастичності головного мозку · PEBAS
zh早发性进行性脑病-听力减退-桥脑发育不全-脑萎缩综合征
trErken başlangıçlı ilerleyici ensefalopati-işitme kaybı-pons hipoplazi-beyin atrofi sendromu

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM617669Evalidated
ICD-10Q07.8NTBTattributedvalidated
MONDO0044696Evalidated
UMLSC5567229Evalidated

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 (5):

No children.

4

Genes

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
TRAPPC12Disease-causing germline mutation(s) inAssessedHGNC:24284ENSG000001718536141392p25.3trafficking protein particle complex subunit 1228777934[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families5 casesWorldwideCase(s)Validated28777934[PMID]_32347653[PMID]_32369837[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET_28777934[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 2020-01-17
HPOTerm (as annotated by Orphanet)Diagnostic
Frequent (79-30%)
HP:0008936Axial hypotonia
HP:0002120Cerebral cortical atrophy
HP:0100704Cerebral visual impairment
HP:0002015Dysphagia
HP:0001332Dystonia
HP:0002020Gastroesophageal reflux
HP:0011471Gastrostomy tube feeding in infancy
HP:0030890Hyperintensity of cerebral white matter on MRI
HP:0007096Hypoplasia of the optic tract
HP:0012110Hypoplasia of the pons
HP:0001336Myoclonus
HP:0001338Partial agenesis of the corpus callosum
HP:0011451Primary microcephaly
HP:0002650Scoliosis
HP:0001250Seizure
HP:0011344Severe global developmental delay
HP:0001257Spasticity
HP:0002119Ventriculomegaly
Occasional (29-5%)
HP:0001274Agenesis of corpus callosum
HP:0002376Developmental regression
HP:0011097Epileptic spasm
HP:0030043Hip subluxation
HP:0002521Hypsarrhythmia
HP:0002490Increased CSF lactate
HP:0012796Increased cup-to-disc ratio
HP:0000011Neurogenic bladder
HP:0000648Optic atrophy
HP:0001561Polyhydramnios
HP:0005484Secondary microcephaly
HP:0001605Vocal cord paralysis

Annotation source: 28777934[PMID]

7

Sources for this card