Calcium in Urine
Alternate Names : Urinary Calcium Excretion, Calcium, 24 Hour Urine
What do the test results mean?
Normal levels of calcium in urine range from 100 to 300 milligrams per day for persons on a normal diet. For those on a low-calcium diet, from 50 to 150 milligrams per day is normal.
Abnormally high levels of calcium in the urine may indicate:
Cushing's syndrome, which is an excess of hormones known as corticosteroids
idiopathic hypercalcemia, which is an elevated calcium level in the blood with no known cause
milk-alkali syndrome, which is an increased blood calcium level caused by ingesting large amounts of calcium and antacids
osteolytic bone disease, which is any disease that destroys bone
osteoporosis, a thinning of the bones that commonly occurs in the elderly
primary hyperparathyroidism, which is excess activity of the parathyroid gland that causes increased blood calcium levels
renal tubular acidosis, a metabolic defect of the kidneys
sarcoidosis, a disease, thought to be caused by an abnormal immune system, that causes problems in multiple areas of the body but especially the lungs
vitamin D intoxication
Abnormally low levels of calcium may indicate:
hypoparathyroidism, or low activity of the parathyroid gland
malabsorption disorders
renal osteodystrophy or thinning of bones caused by kidney failure
vitamin D deficiency
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