Vitamin Deficiencies in Children — Practice

A 6-year-old girl born out of nonconsanguineous marriage presented with rachitic changes in limbs since 2 years of age for which she has received multiple courses of vitamin D. Investigations showed the following. What is the most likely diagnosis? Parameter Calcium Phosphate Alkaline Phosphatase (ALP) Serum Parathyroid hormone (PTH) Serum electrolytes Lab determined value 9.5 mg/dl 1.6 mg/dl 814 IU Normal levels Within Normal Limits (WNL) Serum creatinine Within Normal Limits (WNL) Arterial Blood Gas analysis (ABG) Within Normal Limits (WNL)