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Grant syndrome is a rare osteogenesis imperfecta-like disorder, described in two patients to date, characterized clinically by persistent wormian bones, blue sclera, mandibular hypoplasia, shallow glenoid fossa, and campomelia. There have been no further descriptions in the literature since 1986.
Features include: Tibial bowing, Blue sclerae, Wormian bones, and Down-sloping shoulders and 1 more.
Organ System | Phenotype Count | Example Features |
|---|---|---|
Bones and joints | 1 | Wormian bones |
Estimated prevalence: <1 in 1,000,000 (VERY_RARE).
No clinical trials have been registered for Grant syndrome.
5 publications have been identified in PubMed for Grant syndrome. Research spans Epidemiology / Natural History (40%), Review / Meta-Analysis (20%), and Case Report / Case Series (20%).
Zarei K (2026). [PMID: 41612290](https://pubmed.ncbi.nlm.nih.gov/41612290/). *BMC psychiatry*. [Epidemiology / Natural History]
Sharaf-Eldin W (2026). [PMID: 41811398](https://pubmed.ncbi.nlm.nih.gov/41811398/). *Eur J Pediatr*. [Case Report / Case Series]
Li S (2025). [PMID: 39949024](https://pubmed.ncbi.nlm.nih.gov/39949024/). *Blood transfusion = Trasfusione del sangue*. [Review / Meta-Analysis]
Liao TS (2024). [PMID: 39421489](https://pubmed.ncbi.nlm.nih.gov/39421489/). *Tzu chi medical journal*. [Basic Science / Preclinical]
El-Eshmawy MM (2024). [PMID: 39563980](https://pubmed.ncbi.nlm.nih.gov/39563980/). *Porto biomedical journal*. [Epidemiology / Natural History]
Data assembled from 5 of 12 sources · Last updated Sep 18, 2026, 6:00 PM UTC
Online Mendelian Inheritance in Man
European rare disease database
Genetic and Rare Diseases Info Center
Common questions about Grant syndrome