Kisho is an information platform, not a medical provider. Nothing on this site constitutes medical advice, diagnosis, or treatment recommendations. All content is aggregated from publicly available sources (including ClinicalTrials.gov, PubMed, FDA.gov, and Orphanet) and is provided for informational purposes only. Clinical trial eligibility, treatment decisions, and any health-related actions should always be discussed with a qualified healthcare professional. Kisho does not endorse any specific therapy, organization, or clinical trial. Terms of use · Privacy policy
The newly described 5q14.3 microdeletion syndrome includes severe intellectual deficit with no speech, stereotypic movements and epilepsy.
Features include very common findings: Broad forehead, High forehead, Autistic behavior, and Delayed speech and language development and others; and common findings: Short philtrum, Upslanted palpebral fissure, Motor stereotypy, and Hypoplasia of the corpus callosum and others. 24 total HPO annotations.
Organ System | Phenotype Count | Example Features |
|---|---|---|
Brain and nerves | 5 | Autistic behavior, Delayed speech and language development, Seizure |
Phenotype severity distribution: 7 very common features, 7 common features.
Estimated prevalence: <1 in 1,000,000 (VERY_RARE).
No clinical trials have been registered for 5q14.3 microdeletion syndrome.
7 publications have been identified in PubMed for 5q14.3 microdeletion syndrome. Research spans Review / Meta-Analysis (57%), Case Report / Case Series (14%), and Basic Science / Preclinical (14%).
St Clair Tracy H (2026). [PMID: 42180515](https://pubmed.ncbi.nlm.nih.gov/42180515/). *Front Genet*. [Case Report / Case Series]
Li X (2026). [PMID: 41389464](https://pubmed.ncbi.nlm.nih.gov/41389464/). *Seizure*. [Epidemiology / Natural History]
Fregoso SP (2025). [PMID: 40766418](https://pubmed.ncbi.nlm.nih.gov/40766418/). *bioRxiv*. [Basic Science / Preclinical]
González Rodríguez J (2025). [PMID: 39258307](https://pubmed.ncbi.nlm.nih.gov/39258307/). *Pediatr Dermatol*. [Review / Meta-Analysis]
Corriveau ML (2025). [PMID: 39887826](https://pubmed.ncbi.nlm.nih.gov/39887826/). *Am J Med Genet A*. [Review / Meta-Analysis]
Data assembled from 4 of 12 sources · Last updated Sep 20, 2026, 3:04 PM UTC
European rare disease database
Genetic and Rare Diseases Info Center
Common questions about 5q14.3 microdeletion syndrome
Eyes | 2 | Strabismus, Optic nerve hypoplasia |
Muscles | 2 | Low muscle tone (hypotonia), Frontal cortical atrophy |
Arms and legs | 1 | Toe syndactyly |
Digestive system | 1 | Feeding difficulties |
Reproductive system | 1 | Abnormal nervous system morphology |
Chen CP (2024). [PMID: 39482004](https://pubmed.ncbi.nlm.nih.gov/39482004/). *Taiwan J Obstet Gynecol*. [Review / Meta-Analysis]
AI-curated news mentioning 5q14.3 microdeletion syndrome
Updated Aug 25, 2026
The FDA approved Genglycos (pariglasgene brecaparvovec-opnr) to reduce daily cornstarch intake in patients aged 8 years and older with glycogen storage disease type Ia. Known as Von Gierke disease, GSDIa is a rare metabolic disorder caused by a mutation in the G6PC gene. This genetic variation leads to a deficiency in glucose-6-phosphatase (G6Pase), an enzyme needed to release glucose into the bloodstream. Without this enzyme, the body cannot properly maintain blood glucose levels, causing severe hypoglycemia and other serious metabolic complications · Pariglasgene brecaparvovec is an adeno-associated virus (AAV) serotype 8 based gene therapy that delivers a functional copy of the G6PC gene into liver cells, enabling the production of normally functioning G6Pase. Ultragenyx stated that as part of its postmarketing commitments to the FDA, the Company will provide 2 years of clinical data from open-label commercial treatment of 50 patients and 20 control patients through its existing GSDIa Disease Monitoring Program. ... Ultragenyx announces US FDA approval of Genglycos™ gene therapy, the first-ever FDA-approved treatment designed to treat the underlying cause of glycogen storage disease type Ia (GSDIa). “The reduced reliance on cornstarch, experienced by patients in our clinical studies, demonstrates this gene therapy’s ability to establish the normal breakdown of glycogen to produce glucose during fasting or episodes of metabolic stress. This ability to regulate glucose has alleviated the disease burden and has the potential to mitigate the risk of severe or life-threatening hypoglycemia for these patients.” Close more info about First Gene Therapy Approved for Glycogen Storage Disease Type la