A Practical Approach to Vitamin D Deficiency and Rickets

Area of Science:

• Pediatric Endocrinology
• Mineral Metabolism
• Bone Biology

Background:

• Rickets is characterized by impaired mineralization of growing bone (osteomalacia).
• It stems from insufficient mineral supply (calcium or phosphate) or renal disorders affecting mineralization.
• Vitamin D deficiency remains a primary cause, alongside metabolic and genetic factors.

Purpose of the Study:

• To detail parathyroid hormone-dependent rickets and distal renal tubular disorders.
• To explore the mechanisms of mineral supply deficiency and renal involvement in rickets.
• To provide a structured approach for the diagnosis and treatment of these conditions.

Main Methods:

• Review of existing literature on rickets pathophysiology and etiology.
• Focus on calcium and phosphate metabolism in relation to bone mineralization.
• Discussion of renal tubular disorders contributing to rickets and osteopetrosis.

Main Results:

• Identifies calciopaenic rickets (parathyroid hormone-dependent) and phosphopaenic rickets (FGF23-dependent) as key types.
• Highlights the role of renal disorders, specifically distal renal tubular acidosis, in causing rickets.
• Notes that vitamin D deficiency is the most common cause, with metabolic disorders also implicated.

Conclusions:

• Rickets is distinct from adult osteomalacia, occurring only in growing bone.
• Effective management requires understanding the specific mineral deficiency or renal defect.
• A systematic diagnostic and therapeutic strategy is essential for treating rickets and related bone disorders.