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Surgically curable hypophosphatemic rickets. Diagnosis and management
A Hanukoglu1, S A Chalew, C J Sun
1Division of Pediatric Endocrinology, University of Maryland School of Medicine, Baltimore 21201.
Clinical Pediatrics
|July 1, 1989
Summary
Childhood hypophosphatemic rickets (HR) can stem from kidney defects or tumors. Early tumor identification is crucial for a cure, distinguishing it from lifelong treatment for genetic HR.
Area of Science:
- Pediatric Endocrinology
- Oncology
- Nephrology
Background:
- Childhood hypophosphatemic rickets (HR) is a condition characterized by impaired renal phosphorus reabsorption.
- While often genetic, HR can also be tumor-induced due to a phosphaturic factor.
- Differentiating these causes is vital for appropriate patient management.
Observation:
- A case study details a child with HR caused by a bone hemangiopericytoma.
- Patients typically present with low serum phosphorus, normal calcium, and normal parathyroid hormone levels.
- Key indicators for a tumor evaluation include a lack of family history and the presence of aminoaciduria, especially glycinuria.
Findings:
- Tumor-associated HR is curable via surgical resection of the causative lesion.
- Genetic HR necessitates lifelong management with vitamin D and phosphate supplementation.
- Hemangiopericytomas in bone are identified as a rare cause of HR.
Implications:
- This case highlights the importance of considering oncological causes in pediatric HR.
- Prompt diagnosis and differentiation between genetic and tumor-induced HR significantly impact treatment strategies and outcomes.
- Further research into phosphaturic factors and associated tumors can improve diagnostic accuracy.