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Any autosomal recessive non-syndromic intellectual disability in which the cause of the disease is a mutation in the TRAPPC9 gene.
Features include always present findings: Intellectual disability, Secondary microcephaly, and Truncal obesity; and common findings: Smooth philtrum, Inferior cerebellar vermis hypoplasia, Hypertelorism, and Hyperactivity and others. 24 total HPO annotations.
Data assembled from 5 of 12 sources · Last updated Sep 20, 2026, 4:03 PM UTC
Online Mendelian Inheritance in Man
Genetic and Rare Diseases Info Center
Organ System | Phenotype Count | Example Features |
|---|---|---|
Brain and nerves | 5 | Seizure, Intellectual disability, Delayed speech and language development |
Head and neck | 3 | Secondary microcephaly, Mild microcephaly, Cleft upper lip |
Arms and legs | 2 | Recurrent hand flapping, Slender finger |
TRAPPC9 function has not been fully characterized.
Intellectual disability, autosomal recessive 13 is associated with mutations in the TRAPPC9 gene on chromosome 8.
Genetic testing for TRAPPC9 is available. Testing is considered confirmatory for diagnosis.
Biomarker and diagnostic research for intellectual disability, autosomal recessive 13 has been reported in the published literature.
Phenotype severity distribution: 3 always present features, 16 common features.
No clinical trials have been registered for intellectual disability, autosomal recessive 13.
31 publications have been identified in PubMed for intellectual disability, autosomal recessive 13. Research spans Case Report / Case Series (61%), Review / Meta-Analysis (19%), and Epidemiology / Natural History (6%).
Research Type | Count | % of Total |
|---|---|---|
Patient case studies | 19 | 61% |
Research summaries | 6 | 19% |
Disease patterns and progression | 2 | 6% |
Testing and diagnosis research | 1 | 3% |
Clinical study results | 1 | 3% |
Laboratory research | 1 | 3% |
New treatment approaches | 1 | 3% |
Tao W (2026). [PMID: 41873838](https://pubmed.ncbi.nlm.nih.gov/41873838/). *Hum Mol Genet*. [Case Report / Case Series]
Yeow D (2026). [PMID: 41353788](https://pubmed.ncbi.nlm.nih.gov/41353788/). *Ann Clin Transl Neurol*. [Case Report / Case Series]
Ek M (2026). [PMID: 41514368](https://pubmed.ncbi.nlm.nih.gov/41514368/). *Genome Med*. [Diagnostic / Biomarker]
Aynekin B (2026). [PMID: 41672381](https://pubmed.ncbi.nlm.nih.gov/41672381/). *Biochim Biophys Acta Mol Basis Dis*. [Basic Science / Preclinical]
Ahmad S (2026). [PMID: 41649149](https://pubmed.ncbi.nlm.nih.gov/41649149/). *Clin Dysmorphol*. [Case Report / Case Series]
Al-Shahrani H (2026). [PMID: 41897354](https://pubmed.ncbi.nlm.nih.gov/41897354/). *Biomolecules*. [Case Report / Case Series]
Kovalskaia VA (2026). [PMID: 42271513](https://pubmed.ncbi.nlm.nih.gov/42271513/). *Hum Genomics*. [Case Report / Case Series]
Zhu L (2026). [PMID: 41721346](https://pubmed.ncbi.nlm.nih.gov/41721346/). *Orphanet J Rare Dis*. [Epidemiology / Natural History]
Borgione E (2025). [PMID: 40562130](https://pubmed.ncbi.nlm.nih.gov/40562130/). *Gene*. [Case Report / Case Series]
Iskafi R (2025). [PMID: 39840888](https://pubmed.ncbi.nlm.nih.gov/39840888/). *J Investig Med High Impact Case Rep*. [Review / Meta-Analysis]