Features include always present findings: Encephalopathy, Hearing loss (hearing impairment), Dystonia, and Cerebral cortical atrophy and others; and common findings: Hypsarrhythmia, Seizure, Cerebral visual impairment, and Neurogenic bladder and others.

TRAPPC12 function has not been fully characterized.

Early-onset progressive encephalopathy-hearing loss-pons hypoplasia-brain atrophy syndrome is associated with mutations in the TRAPPC12 gene on chromosome 2.

Genetic testing for TRAPPC12 is available. Testing is considered confirmatory for diagnosis.

Biomarker and diagnostic research for early-onset progressive encephalopathy-hearing loss-pons hypoplasia-brain atrophy syndrome has been reported in the published literature.

Phenotype severity distribution: 18 always present features, 8 common features.

Estimated prevalence: <1 in 1,000,000 (VERY_RARE).

No clinical trials have been registered for early-onset progressive encephalopathy-hearing loss-pons hypoplasia-brain atrophy syndrome.

57 publications have been identified in PubMed for early-onset progressive encephalopathy-hearing loss-pons hypoplasia-brain atrophy syndrome. Research spans Case Report / Case Series (49%), Review / Meta-Analysis (21%), and Epidemiology / Natural History (16%).