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2q23.1 microduplication syndrome is a rare chromosomal anomaly syndrome, resulting from the partial duplication of the long arm of chromosome 2, primarily characterized by global developmental delay, hypotonia, autistic-like features and behavioral problems. Craniofacial dysmorphism (arched eyebrows, hypertelorism, bilateral ptosis, prominent nose, wide mouth, micro/retrognathia) and an affable personality are also commonly associated. Minor digital anomalies (fifth finger clinodactyly and large, broad first toe) have occasionally been reported.
Biomarker and diagnostic research for 2q23.1 microduplication syndrome has been reported in the published literature.
Estimated prevalence: <1 in 1,000,000 (VERY_RARE).
No clinical trials have been registered for 2q23.1 microduplication syndrome.
4 publications have been identified in PubMed for 2q23.1 microduplication syndrome. Research spans Diagnostic / Biomarker (50%), Case Report / Case Series (25%), and Basic Science / Preclinical (25%).
Choi N (2026). [PMID: 41479269](https://pubmed.ncbi.nlm.nih.gov/41479269/). *Journal of clinical laboratory analysis*. [Diagnostic / Biomarker]
Popescu-Hobeanu G (2025). [PMID: 40869914](https://pubmed.ncbi.nlm.nih.gov/40869914/). *Genes*. [Diagnostic / Biomarker]
Zhang B (2025). [PMID: 41345686](https://pubmed.ncbi.nlm.nih.gov/41345686/). *Molecular cytogenetics*. [Case Report / Case Series]
Granata P (2024). [PMID: 39654053](https://pubmed.ncbi.nlm.nih.gov/39654053/). *BMC genomics*. [Basic Science / Preclinical]
Data assembled from 3 of 12 sources · Last updated Sep 18, 2026, 2:20 PM UTC
European rare disease database
Genetic and Rare Diseases Info Center
AI-curated news mentioning 2q23.1 microduplication 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