Trait
Craniocervical junction constriction
Congenital or acquired abnormalities of the occipital bone, foramen magnum, or first two cervical vertebrae that decrease the space for the lower brain stem and cervical cord. These malformations can lead to cranial nerve compression, vertebral artery compression, and obstructive hydrocephalus.
Summary
- Also called
- Tight craniocervical junction, Tight craniovertebral junction
- Body system
- Abnormality of the musculoskeletal system
Reference genomeGRCh38hg38
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Get my Genome Test1 gene linked to Craniocervical junction constriction
Changes in these genes cause rare conditions in which Craniocervical junction constriction is seen. Most people with this trait have none of those conditions, and a gene on this list says nothing about anyone's own genome.
| Gene | How often it is seen | Conditions |
|---|---|---|
| FGFR3fibroblast growth factor receptor 3 | Not recorded | In 1 condition |
How often is among people with one of the gene's conditions, the most often across them, as the Human Phenotype Ontology records it. These pages describe traits and the research behind them; they are not a diagnosis, and a doctor or genetic counsellor is the person to ask about symptoms.
Broader traits
Where this comes from
- The Human Phenotype Ontology, release 2026-09-01: the trait, its names, its definition and the genes linked to it. Find out more at hpo.jax.org.
- Data release 2026.10.16-c6eea6bf.
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