Examination of a 5-year-old child with a hereditary kidney disorder detected signs of rickets, though laboratory tests showed normal vitamin D levels. What is the most likely cause of rickets in this case?
- A Insufficient calcium intake with food
- B Hypoparathyroidism
- C Disturbed calcitriol synthesis
- D Hyperparathyroidism
- E Increased calcium excretion
Правильна відповідь: C. Disturbed calcitriol synthesis
Пояснення
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