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5p13 microduplication syndrome is a rare partial autosomal trisomy/tetrasomy characterized by global developmental delay, intellectual disability, autistic behavior, muscular hypotonia, macrocephaly and facial dysmorphism (frontal bossing, short palpebral fissures, low set, dysplastic ears, short or shallow philtrum, high arched or narrow palate, micrognathia). Other associated clinical features include sleep disturbances, seizures, aplasia/hypoplasia of the corpus callosum, skeletal abnormalities (large hands and feet, long fingers and toes, talipes).
Features include always present findings: Intellectual disability and Global developmental delay; and common findings: Narrow forehead, Seizure, Low muscle tone (hypotonia), and Sleep disturbance and others. 45 total HPO annotations.
Organ System | Phenotype Count | Example Features |
|---|---|---|
Brain and nerves | 5 | Seizure, Intellectual disability, Global developmental delay |
Phenotype severity distribution: 2 always present features, 12 common features.
Estimated prevalence: <1 in 1,000,000 (VERY_RARE).
No clinical trials have been registered for chromosome 5p13 duplication syndrome.
2 publications have been identified in PubMed for chromosome 5p13 duplication syndrome. Kisho has analyzed 1 by research type. Research spans Clinical Trial Publication (100%).
Ormieres C (2025). [PMID: 39948625](https://pubmed.ncbi.nlm.nih.gov/39948625/). *Mol Autism*. [Clinical Trial Publication]
Data assembled from 5 of 12 sources · Last updated Sep 18, 2026, 11:35 PM UTC
Online Mendelian Inheritance in Man
European rare disease database
Genetic and Rare Diseases Info Center
Common questions about chromosome 5p13 duplication syndrome
Arms and legs |
3 |
Large hands, Long fingers, Long foot |
Head and neck | 3 | High palate, Macrocephaly, Craniosynostosis |
Eyes | 1 | Strabismus |
Muscles | 1 | Low muscle tone (hypotonia) |
Bones and joints | 1 | Sideways curvature of the spine (scoliosis) |