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‹ Sat · 11 Jul 2026
Underserved or high-risk populations

Insight into Natural History and Phenotype in Untreated Adults with X-Linked Hypophosphatemia.

Adults with untreated X-linked hypophosphatemia face significant physical and quality-of-life challenges, clarifying the real need for available treatments.

In the first comprehensive natural history study of untreated adult X-linked hypophosphatemia (n=52), the majority demonstrated disproportionate short stature and skeletal deformities, with pseudofractures in 33%, overweight/obesity in 87%, and severely compromised quality of life. These findings establish the substantial ongoing disease burden in untreated adults and provide phenotypic reference data for burosumab trial design and rare disease registry development.

What the study was

Study design
descriptive cohort study
Population
Untreated adults with X-linked hypophosphatemia (n=52)
Sample size
52
Category
Public Health
Maturity
Exploratory
Journal
Calcified tissue international

Why it surfaced

First comprehensive natural history characterization of untreated adult XLH (n=52); establishes disease burden rationale for treatment and provides baseline phenotypic reference for burosumab trials and rare disease registry design.

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