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Any van Maldergem syndrome in which the cause of the disease is a mutation in the DCHS1 gene.
Features include always present findings: Low muscle tone (hypotonia), Feeding difficulties, Global developmental delay, and Camptodactyly and others; and common findings: Renal hypoplasia, Radial head subluxation, Hypoplasia of the corpus callosum, and Hypoplasia of the maxilla and others. 54 total HPO annotations.
Organ System | Phenotype Count | Example Features |
|---|---|---|
Bones and joints | 4 | Joint hypermobility, Mild bone density loss (osteopenia), Skeletal dysplasia |
DCHS1 encodes dachsous cadherin-related 1 (3,298 aa). Calcium-dependent cell-adhesion protein. Mediates functions in neuroprogenitor cell proliferation and differentiation. Highest expression in Uterus (67.0 TPM) and Cervix Endocervix (40.8 TPM).
Van Maldergem syndrome 1 is associated with mutations in the DCHS1 gene on chromosome 11.
DCHS1 is classified as a druggable target with score 0.0.
Genetic testing for DCHS1 is available. Testing is considered confirmatory for diagnosis.
Phenotype severity distribution: 10 always present features, 7 common features.
No clinical trials have been registered for van Maldergem syndrome 1.
5 publications have been identified in PubMed for van Maldergem syndrome 1. Research spans Review / Meta-Analysis (60%), Case Report / Case Series (20%), and Basic Science / Preclinical (20%).
Byerly K (2026). [PMID: 41972678](https://pubmed.ncbi.nlm.nih.gov/41972678/). *Cells*. [Basic Science / Preclinical]
Wang Y (2025). [PMID: 40797481](https://pubmed.ncbi.nlm.nih.gov/40797481/). *Medicine (Baltimore)*. [Case Report / Case Series]
Brenner E (2025). [PMID: 41439975](https://pubmed.ncbi.nlm.nih.gov/41439975/). *Cells*. [Review / Meta-Analysis]
Rosenblum J (2025). [PMID: 39462795](https://pubmed.ncbi.nlm.nih.gov/39462795/). *Clin Genet*. [Review / Meta-Analysis]
Dahawi M (2024). [PMID: 39574152](https://pubmed.ncbi.nlm.nih.gov/39574152/). *Hum Genomics*. [Review / Meta-Analysis]
Data assembled from 5 of 12 sources · Last updated Sep 19, 2026, 5:22 PM UTC
Online Mendelian Inheritance in Man
Head and neck | 3 | Tented upper lip vermilion, Hypoplasia of the maxilla, High palate |
Muscles | 2 | Low muscle tone (hypotonia), Generalized hypotonia |
Brain and nerves | 2 | Intellectual disability, Global developmental delay |
Arms and legs | 2 | Cutaneous finger syndactyly, Abnormal foot morphology |
Ears | 2 | Inner ear hearing loss (sensorineural hearing impairment), Conductive hearing impairment |
Kidneys and urinary system | 1 | Renal hypoplasia |
Digestive system | 1 | Feeding difficulties |
Eyes | 1 | Ptosis |
Growth and development | 1 | Growth delay |