Tumor-induced Osteomalacia Disease Monitoring Program

Study Overview
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Brief Summary
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The objectives of this observational study are to assess the long-term safety and long-term effectiveness of burosumab in patients with TIO who are being treated with burosumab as prescribed by their physician and to monitor the course of the underlying phosphaturic mesenchymal tumor (PMT) overtime in patients with TIO irrespective of their treatment status.

Detailed Description
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Enrolled patients may or may not be treated with commercially available burosumab during the TIO DMP at the discretion of their treating physician. Given the observational nature of the TIO DMP, specific treatments or supportive management will not be provided as part of the study.

Official Title
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Tumor-induced Osteomalacia Disease Monitoring Program (TIO DMP)

Conditions
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Tumor-induced Osteomalacia (TIO)

Intervention / Treatment
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* Other: No intervention


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Have a clinical diagnosis of TIO based on the presence of an underlying PMT (confirmed by imaging) AND/OR historical documentation. Note: For adult patients with TIO in whom the causative PMT has never been located, and all pediatric patients, documented evidence of negative genetic testing for other hereditary hypophosphatemic disorders is necessary For patient safety, all participating female patients of child-bearing potential must be willing to have pregnancy tests prior to certain assessments performed as part of the DMP Be willing to provide access to prior medical records including tumor pathology reports and biopsy slides, imaging, biochemical, and diagnostic, medical, and surgical history data, if available Be willing and able to provide informed consent after the nature of the study has been explained, and prior to any research-related procedures Be willing and able to comply with the study visit schedule and study procedures Exclusion Criteria: Have a clinical diagnosis of TIO deemed to be caused by a tumor other than a PMT Serious medical or psychiatric comorbidity that, in the opinion of the Investigator, would present a concern for patient safety or compromise the ability to provide consent or comply with the study visit schedule and study procedures Less than 1 year of life expectancy (for any cause) in the opinion of the Investigator Concurrent enrollment in a clinical trial without prior approval from the TIO DMP Sponsor Undergoing treatment with burosumab for an unapproved indication
Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Prior TIO Burosumab Clinical Trial Participants<br> | Other: No intervention<br>* Access to any treatment is through authorized commercial use and not as part of this DMP<br>|
| Adults Who Have Not Participated In Prior Burosumab Clinical Trials<br> | Other: No intervention<br>* Access to any treatment is through authorized commercial use and not as part of this DMP<br>|
| Pediatrics Who Have Not Participated In Prior Burosumab Clinical Trials<br> | Other: No intervention<br>* Access to any treatment is through authorized commercial use and not as part of this DMP<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Long-Term Effectiveness of Burosumab: Change From Baseline in Serum Phosporus Over Time |  | 10 years | 
| Long-Term Effectiveness of Burosumab: Change From Baseline in Serum 1,25(OH)2D Over Time |  | 10 years | 
| Long-Term Effectiveness of Burosumab: Change From Baseline in Serum Alkaline Phosphatase (ALP) Over Time |  | 10 years | 
| Long-Term Effectiveness of Burosumab: Change From Baseline in Serum FGF23 Over Time in Participants Not Undergoing Treatment With Burosumab |  | 10 years | 
| Long-Term Safety of Burosumab: Change From Baseline in Phosphaturic Mesenchymal Tumor (PMT) Size Over Time as Assessed by Tumor Imaging |  | 10 years | 
| Long-Term Safety of Burosumab: Number of Participants With New PMT Development as Assessed by Tumor Imaging |  | 10 years | 
| Long-Term Safety of Burosumab: Change From Baseline in Serum iPTH Over Time |  | 10 years | 
| Long-Term Safety of Burosumab: Change From Baseline in Serum Calcium Over Time |  | 10 years | 
| Long-Term Safety of Burosumab: Change From Baseline in Urine Calcium Over Time |  | 10 years | 
| Long-Term Safety of Burosumab: Change From Baseline Urinary Calcium/Creatinine Ratio |  | 10 years | 
| Long-Term Safety of Burosumab: Change From Baseline in Serum Creatinine Over Time |  | 10 years | 
| Long-Term Safety of Burosumab: Change From Baseline in Urine Creatinine Over Time |  | 10 years | 
| Long-Term Safety of Burosumab: Change From Baseline in Urine Protein/Creatinine Ratio Over Time |  | 10 years | 
| Long-Term Safety of Burosumab: Number of Participants With Nephrocalcinosis Over Time |  | 10 years | 
| Long-Term Safety of Burosumab: Number of Participants With Serious Adverse Events (SAEs) and Adverse Events (AEs) and Related AEs |  | 10 years | 
| Long-Term Safety of Burosumab: Number of Participants With Incidence and/or Progression of Spinal Stenosis Over Time |  | 10 years | 
| Long-Term Safety of Burosumab: Number of Participants With Normal and/or Potentially Clinically Significant Pregnancy Outcomes | Includes maternal, neonatal and infant outcomes | 10 years | 
| Long-Term Effectiveness of Burosumab: Change From Baseline in Brief Fatigue Inventory (BFI) Scores in Adult Participants Over Time |  | 10 years | 
| Long-Term Effectiveness of Burosumab: Change From Baseline in Patient-Reported Outcomes Measurement Information System (PROMIS) Fatigue Scores in Pediatric Participants Over Time |  | 10 years | 
| Long-Term Effectiveness of Burosumab: Change From Baseline in Brief Pain Inventory (BPI) Scores in Adult Participants Over Time |  | 10 years | 
| Long-Term Effectiveness of Burosumab: Change From Baseline in PROMIS Pain Scores in Pediatric Participants Over Time |  | 10 years | 
| Long-Term Effectiveness of Burosumab: Change From Baseline in PROMIS Physical Function Scores Over Time |  | 10 years | 
| Long-Term Effectiveness of Burosumab: Change From Baseline in Short Form-36 version 2 (SF-36v2) in Adult Participants Over Time |  | 10 years | 
| Long-Term Effectiveness of Burosumab: Change in Short Form-10 (SF-10) for Pediatric Participants Over Time |  | 10 years | 
| Long-Term Effectiveness of Burosumab: Number of Participants With Changes From Baseline in Clinical Findings |  | 10 years | 
| Long-Term Effectiveness of Burosumab: Number of Participants With Changes From Baseline in Resource/Health Utilization |  | 10 years |