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Features include always present findings: Basal ganglia calcification; and very common findings: Limb ataxia and Cerebellar calcifications. 19 total HPO annotations.
Organ System | Phenotype Count | Example Features |
|---|---|---|
Brain and nerves | 12 | Parkinsonism, Slowness of movement (bradykinesia), Babinski sign |
JAM2 encodes junctional adhesion molecule 2 (298 aa). Junctional adhesion protein that mediates heterotypic cell-cell interactions with its cognate receptor JAM3 to regulate different cellular processes. Highest expression in Uterus (42.4 TPM) and Cervix Ectocervix (38.1 TPM).
Basal ganglia calcification, idiopathic, 8, autosomal recessive is associated with mutations in the JAM2 gene on chromosome 21.
The JAM2 protein participates in integrin alpha4beta1:JAM2:JAM3 pathway.
JAM2 is classified as a druggable target (Cell Surface and Druggable Genome categories) with score 0.0.
Genetic testing for JAM2 is available. Testing is considered confirmatory for diagnosis.
Phenotype severity distribution: 1 always present feature, 2 very common features, 9 common features.
No clinical trials have been registered for basal ganglia calcification, idiopathic, 8, autosomal recessive.
4 publications have been identified in PubMed for basal ganglia calcification, idiopathic, 8, autosomal recessive. Research spans Review / Meta-Analysis (25%), Case Report / Case Series (25%), and Basic Science / Preclinical (25%).
Yektay Farahmand M (2025). [PMID: 40947452](https://pubmed.ncbi.nlm.nih.gov/40947452/). *Journal of neurology*. [Basic Science / Preclinical]
Yang D (2025). [PMID: 40456615](https://pubmed.ncbi.nlm.nih.gov/40456615/). *eNeuro*. [Review / Meta-Analysis]
Cao C (2024). [PMID: 38859923](https://pubmed.ncbi.nlm.nih.gov/38859923/). *Frontiers in neuroscience*. [Case Report / Case Series]
Bonato G (2024). [PMID: 38999439](https://pubmed.ncbi.nlm.nih.gov/38999439/). *Journal of clinical medicine*. [Epidemiology / Natural History]
Data assembled from 5 of 12 sources · Last updated Sep 20, 2026, 5:36 PM UTC
Online Mendelian Inheritance in Man
Genetic and Rare Diseases Info Center
Common questions about basal ganglia calcification, idiopathic, 8, autosomal recessive
2 |
Limb dystonia, Limb ataxia |
Eyes | 1 | Nystagmus |
Head and neck | 1 | Hypomimic face |