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| ==Background==
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| *Preventable condition in infants and children that is attributed to [[Vitamin D deficiency]] and [[Hypocalcemia]]
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| *Extreme deficiency leading to decrease bone mineralization in children, with or without hypocalcemia
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| *Risk factors for [[Vitamin D deficiency]] in infants include:
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| **Exclusive breastfed infants without vitamin D supplementation
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| **Dark skin pigmentation
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| **Maternal [[Vitamin D deficiency]]
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| ***In utero, 25-hydroxyvitamin D passes through the placenta to the infant
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| ==Clinical Features==
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| *Peak incidence between 3 and 18 months of age
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| *Enlarged skull, joints of long bones, and rib cage
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| *Curvature of the spine and femurs
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| *Generalized muscle weakness
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| ==Differential Diagnosis==
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| ==Evaluation==
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| ==Management==
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| *Prevention key:
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| **For healthy infants, children, and adolescents recommend a vitamin D intake of at least 400 IU/day
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| ==Disposition==
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| ==See Also==
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| ==External Links==
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| ==References==
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| <references/>
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