Effect of burosumab conversion on calciuria and nephrocalcinosis in children with XLH: A real-world cohort study
Bibliographic record
Abstract
Background: Burosumab, a monoclonal antibody to fibroblast growth factor 23 (FGF23), is effective for X-linked hypophosphatemic rickets (XLH). Renal effects, particularly calciuria and nephrocalcinosis, remain incompletely characterized. Methods: In this retrospective cohort, 13 children with genetically confirmed XLH (7 females, 6 males; 0.6-16.3 years) were evaluated after conversion from conventional therapy to burosumab. Longitudinal changes in serum phosphate, TmP/GFR, TRP, 1,25(OH)₂D, intact parathyroid hormone (PTH), and urinary calcium/creatinine (Ca:Cr) were assessed. Hypercalciuria was defined using age-specific SI thresholds; Ca:Cr was also expressed as ×ULN (Ca:Cr divided by the age-specific upper limit). Results: < 0.05), whereas 1,25(OH)₂D did not. Conclusion: Burosumab improves phosphate homeostasis in children with XLH, but a minority may develop hypercalciuria and nephrocalcinosis, potentially linked to PTH suppression. Vigilant biochemical and ultrasound monitoring-particularly early after conversion-and consideration of prophylaxis in high-risk cases are advisable.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".