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FRAXF syndrome was originally identified in a family with developmental delay and an expanded CCG repeat at the folate-sensitive FRAXF fragile site. Since this initial description, FRAXF has been associated with a range of manifestations but no clear phenotype has been established.
Estimated prevalence: Unknown (Unknown prevalence).
Data assembled from 2 of 12 sources · Last updated Sep 19, 2026, 11:55 PM UTC
European rare disease database
Genetic and Rare Diseases Info Center
Common questions about FRAXF syndrome