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We report an 11 month-old infant with severe hypercalcemia associated with hyperlipidemia following bolus vitamin D administration. At the time of admission, serum concentration of calcium was 5.5 mmol/l (22 mg/dl); total cholesterol, high density lipoprotein cholesterol (HDL-C), very low density lipoprotein (VLDL), low density lipoprotein cholesterol (LDL-C), and triglyceride levels were respectively: 6.37 mmol/l (246 mg/dl), 0.77 mmol/l (30 mg/dl), 1.37 mmol/l (54 mg/dl), 4.1 mmol/l (162 mg/dl), 3 mmol/l (271 mg/dl). Physical examination revealed dehydration and irritability that was inappropriately mild according to the serum calcium level. On the 16th day of therapy that consisted of intravenous fluids with furosemide (sodium diuresis), steroid, calcitonin, magnesium sulfate, and phosphorus, serum calcium level declined below 3 mmol/l (12 mg/dl). The hyperlipidemia resolved gradually with a concomitant decline in serum calcium. This report is interesting in that hypercalcemia was associated with transient hyperlipidemia that disappeared with normocalcemia, which might suggest protection against hypercalcemic symptoms.

Severe Hypercalcemia of an Infant Due to Vitamin D Toxicity Associated With Hypercholesterolemia