Abstract
A 19-year-old Indian girl presenting with intermittent tetany, enamel hypoplasia, bilateral cataracts, and calcification of the basal ganglia is described. Dental evidence suggested a calcification defect had been present from the age of 2–3 years. Hypocalcemia, hyperphosphatemia, and low levels of immunoassayable parathyroid hormone (iPTH), urinary cAMP, 25-hydroxyvitamin D, and 1,25-dihydroxyvitamin D were documented, suggesting hypoparathyroidism with vitamin D deficiency. A bone biopsy showed osteomalacia. Following ultraviolet irradiation and oral calciferol therapy, a symptomatic and biochemical response typical of privational vitamin D deficiency occurred. iPTH levels rose to normal and remained normal following withdrawal of treatment, indicating that the clinical features were entirely due to long-standing vitamin D deficiency.
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