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Holoprosencephaly-craniosynostosis syndrome is a rare developmental defect during embryogenesis syndrome characterized by the association of primary craniosynostosis (usually involving the coronal and metopic sutures) with holoprosencephaly (ranging from alobar to, most commonly, semilobar) and various skeletal anomalies (typically, hand and feet anomalies including fifth digit clinodactyly, hypoplastic phalanges and cone-shaped epiphyses, small vertebral bodies, scoliosis, coxa valga and/or flexion deformities of hips). Craniofacial asymmetry, microcephaly, brachy/plagiocephaly, short stature and psychomotor delay are additional common features.
Features include: Coxa valga, Lambdoidal craniosynostosis, Coronal craniosynostosis, and Short distal phalanx of finger and 2 more.
Organ System | Phenotype Count | Example Features |
|---|---|---|
Head and neck | 2 | Lambdoidal craniosynostosis, Coronal craniosynostosis |
Biomarker and diagnostic research for holoprosencephaly-craniosynostosis syndrome has been reported in the published literature.
Estimated prevalence: <1 in 1,000,000 (VERY_RARE).
No clinical trials have been registered for holoprosencephaly-craniosynostosis syndrome.
4 publications have been identified in PubMed for holoprosencephaly-craniosynostosis syndrome. Research spans Diagnostic / Biomarker (25%), Case Report / Case Series (25%), and Basic Science / Preclinical (25%).
Waller DK (2026). [PMID: 42089396](https://pubmed.ncbi.nlm.nih.gov/42089396/). *Birth Defects Res*. [Epidemiology / Natural History]
Corona-Rivera JR (2025). [PMID: 40079387](https://pubmed.ncbi.nlm.nih.gov/40079387/). *Am J Med Genet A*. [Case Report / Case Series]
Gallagher ER (2025). [PMID: 39155612](https://pubmed.ncbi.nlm.nih.gov/39155612/). *Cleft Palate Craniofac J*. [Diagnostic / Biomarker]
Escamilla-Vega E (2025). [PMID: 40424121](https://pubmed.ncbi.nlm.nih.gov/40424121/). *Proc Natl Acad Sci U S A*. [Basic Science / Preclinical]
Data assembled from 5 of 12 sources · Last updated Sep 20, 2026, 8:42 AM UTC
Online Mendelian Inheritance in Man
European rare disease database
Genetic and Rare Diseases Info Center
1 |
Short distal phalanx of finger |
Bones and joints | 1 | Hypoplastic vertebral bodies |