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Start free with EleplanIsolated optic nerve aplasia
ORPHA:637064Morphological anomaly
What it is
A rare developmental defect during embryogenesis characterized by congenital absence of the optic nerve head, optic nerve fibers, retinal ganglion cells, and retinal blood vessels in a malformed eye. It often occurs unilaterally with otherwise normal brain development. In bilateral cases it is accompanied by other central nervous system malformations.
Key facts
- Prevalence
- <1 / 1 000 000
- Age of onset
- Infancy, Neonatal
- Inheritance
- Autosomal dominant, Autosomal recessive
- Classified as
- Morphological anomaly
Prevalence figures describe populations, not individuals, and are often estimates from a single study. Where the figure is an incidence or a birth prevalence, it says so.
ICD-10 codes
ICD-10 has no distinct code for most rare diseases, so many are filed under the nearest available one. A shared code identifies the group, not this disease — the ORPHAcode above is what identifies it.
Related health topics
Reached through the ICD-10 categories this disease is filed under, so these describe the broader group rather than this disease specifically.
Cross-references
Orphadata Science: Free access data from Orphanet. © INSERM 1999. Data version 2026-06-23. Available under CC BY 4.0. This is a reference, not medical advice.
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