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Features include always present findings: Epicanthus, Upslanted palpebral fissure, Long philtrum, and Low muscle tone (hypotonia) and others; and common findings: Short stature, Failure to thrive, Prominent forehead, and Chronic constipation and others.
Organ System | Phenotype Count | Example Features |
|---|---|---|
Brain and nerves | 6 | Aggressive behavior, Anxiety, Intellectual disability |
NSD2 encodes nuclear receptor binding SET domain protein 2 (1,365 aa). Histone methyltransferase which specifically dimethylates nucleosomal histone H3 at 'Lys-36' (H3K36me2). Also monomethylates nucleosomal histone H3 at 'Lys-36' (H3K36me) in vitro. Highest expression in Cells EBV-transformed lymphocytes (34.3 TPM) and Testis (24.1 TPM).
Rauch-Steindl syndrome is associated with mutations in the NSD2 gene on chromosome 4.
The NSD2 protein participates in WHSC1 (KMT3G), NSD1 (KMT3B), SMYD2 (KMT3C) methylate lysine-37 of histone H3 (H3K36), WHSC1 (KMT3G), NSD1 (KMT3B), SMYD2 (KMT3C), ASH1L methylate methyl-lysine-37 of histone H3 (H3K36), and PKMTs methylate histone lysines pathways.
NSD2 is classified as a druggable target (Clinically Actionable and Enzyme categories) with score 1.6.
Genetic testing for NSD2 is available. Testing is considered confirmatory for diagnosis.
Biomarker and diagnostic research for Rauch-Steindl syndrome has been reported in the published literature.
Phenotype severity distribution: 29 always present features, 12 common features.
Estimated prevalence: <1 in 1,000,000 (VERY_RARE).
No clinical trials have been registered for Rauch-Steindl syndrome.
4 publications have been identified in PubMed for Rauch-Steindl syndrome. Research spans Case Report / Case Series (75%) and Diagnostic / Biomarker (25%).
Szoszkiewicz A (2026). [PMID: 41751889](https://pubmed.ncbi.nlm.nih.gov/41751889/). *International journal of molecular sciences*. [Diagnostic / Biomarker]
Zhu H (2026). [PMID: 41593547](https://pubmed.ncbi.nlm.nih.gov/41593547/). *BMC neurology*. [Case Report / Case Series]
Xu S (2026). [PMID: 42216445](https://pubmed.ncbi.nlm.nih.gov/42216445/). *Mol Genet Genomic Med*. [Case Report / Case Series]
Li C (2026). [PMID: 42221011](https://pubmed.ncbi.nlm.nih.gov/42221011/). *Front Pediatr*. [Case Report / Case Series]
Data assembled from 6 of 12 sources · Last updated Sep 18, 2026, 4:32 PM UTC
Online Mendelian Inheritance in Man
European rare disease database
Common questions about Rauch-Steindl syndrome
Growth and development |
4 |
Short stature, Failure to thrive, Postnatal growth retardation |
Digestive system | 4 | Enlarged liver (hepatomegaly), Chronic constipation, Feeding difficulties |
Kidneys and urinary system | 2 | Hyperechogenic kidneys, Bilateral renal hypoplasia |
Muscles | 1 | Low muscle tone (hypotonia) |
Head and neck | 1 | Microcephaly |
Arms and legs | 1 | Clinodactyly of the 5th finger |
AI-curated news mentioning Rauch-Steindl syndrome
Updated May 30, 2026
A novel NSD2 missense variant has been identified and functionally analyzed in a patient with Rauch-Steindl Syndrome. This discovery adds to the understanding of the genetic underpinnings of this rare condition.