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A single case of hypophosphatemic rickets with hypercalciuria
Journal of Pediatric Gastroenterology and Nutrition
|September 1, 1986
Summary
This study reports a unique case of hypophosphatemic rickets with hypercalciuria, a condition previously undocumented. Phosphate supplementation effectively treated the rickets, suggesting a novel therapeutic approach for this rare disorder.
Area of Science:
- Pediatric Endocrinology
- Nephrology
- Metabolic Bone Disease
Background:
- Hypophosphatemic rickets typically presents with characteristic skeletal and biochemical abnormalities.
- Vitamin D resistant rickets often requires specific therapeutic interventions.
- Hypercalciuria can complicate management in certain renal phosphate wasting disorders.
Observation:
- A single patient presented with hypophosphatemic rickets, hypercalciuria, and elevated serum 1,25 dihydroxyvitamin D.
- Clinical features included genu valgum, rickets, and short stature, similar to known forms of hypophosphatemic rickets.
- Standard treatment with 1 alpha-hydroxyvitamin D was ineffective.
Findings:
- Long-term phosphate supplementation alone normalized clinical and biochemical parameters, except for a reduced tubular reabsorption of phosphate.
- Serum 1,25 dihydroxyvitamin D levels appeared regulated by serum phosphorus, not parathyroid hormone.
- This represents the first reported case of isolated hypophosphatemic rickets with hypercalciuria.
Implications:
- Phosphate supplementation may be a primary treatment for this specific subtype of rickets.
- The interplay between phosphate, vitamin D, and 1,25 dihydroxyvitamin D in this condition warrants further investigation.
- This case expands the understanding of the spectrum of hypophosphatemic rickets and their management.