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Features include always present findings: Rod-cone dystrophy, Joint hypermobility, Global developmental delay, and Very long chain fatty acid accumulation; and sometimes findings: Pes cavus. 23 total HPO annotations.
Organ System | Phenotype Count | Example Features |
|---|---|---|
Brain and nerves | 6 | Ataxia, Unsteady gait, Hyporeflexia |
PEX2 function has not been fully characterized.
Peroxisome biogenesis disorder 5B is associated with mutations in the PEX2 gene on chromosome 8.
Genetic testing for PEX2 is available. Testing is considered confirmatory for diagnosis.
Phenotype severity distribution: 4 always present features.
No clinical trials have been registered for peroxisome biogenesis disorder 5B.
4 publications have been identified in PubMed for peroxisome biogenesis disorder 5B. Research spans Basic Science / Preclinical (100%).
Gomez VA (2025). [PMID: 40621817](https://pubmed.ncbi.nlm.nih.gov/40621817/). *Disease models & mechanisms*. [Basic Science / Preclinical]
Amin S (2025). [PMID: 40552310](https://pubmed.ncbi.nlm.nih.gov/40552310/). *Frontiers in cell and developmental biology*. [Basic Science / Preclinical]
Pinelli M (2024). [PMID: 39069546](https://pubmed.ncbi.nlm.nih.gov/39069546/). *Cell death & disease*. [Basic Science / Preclinical]
Montes ID (2024). [PMID: 39386596](https://pubmed.ncbi.nlm.nih.gov/39386596/). *bioRxiv : the preprint server for biology*. [Basic Science / Preclinical]
Data assembled from 5 of 12 sources · Last updated Sep 18, 2026, 5:14 PM UTC
Online Mendelian Inheritance in Man
Genetic and Rare Diseases Info Center
Eyes
5 |
Nystagmus, Slow saccadic eye movements, Oculomotor apraxia |
Muscles | 3 | Shrinkage of the cerebellum (cerebellar atrophy), Generalized hypotonia, Neonatal hypotonia |
Digestive system | 1 | Decreased liver function |
Lab test results | 1 | Elevated circulating phytanic acid concentration |
Bones and joints | 1 | Joint hypermobility |
Ears | 1 | Inner ear hearing loss (sensorineural hearing impairment) |
Pregnancy and birth | 1 | Neonatal hypotonia |