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Excess calcium in your blood means your kidneys have to work harder to filter it. This can cause excessive thirst and frequent urination. Digestive system. Hypercalcemia can cause stomach upset, nausea, vomiting and constipation. Bones and muscles. In most cases, the excess calcium in your blood was leached from your bones, which weakens them.
What causes high calcium in the blood? High blood calcium, or hypercalcemia, is almost always caused by a small benign tumor on one or more of the parathyroid glands in your neck. High blood calcium can lead to many serious health problems and should almost always be treated with an operation to remove the parathyroid tumor.
High calcium levels or high blood calcium levels. Types of cancer that cause hypercalcemia of malignancy include cancers of the lung, breast, esophagus, mouth, tongue, lip, kidney, ovary, uterus, and cervix. Blood-borne cancers such as lymphoma and multiple myeloma can also cause high calcium levels.
High calcium levels in the blood (hypercalcemia) are not as common as low levels but often signal serious medical conditions. The most common causes of hypercalcemia are hyperparathyroidism and cancer.
Hyperparathyroidism is one of the most common causes of high calcium in the blood. This condition results from hyperactivity of the parathyroid glands. These glands secrete parathyroid hormone, which works to increase the amount of calcium in the blood.
While mildly elevated calcium may not cause any symptoms at all, very high calcium levels can result in abdominal pain, kidney stones, excessive thirst, bone pain, muscle weakness and confusion.
Hypercalcaemia, also spelled hypercalcemia, is a high calcium (Ca2+) level in the blood serum. The normal range is 2.1–2.6 mmol/L (8.8–10.7 mg/dL, 4.3–5.2 mEq/L) with levels greater than 2.6 mmol/L defined as hypercalcemia. Those with a mild increase that has developed slowly typically have no symptoms. In those with greater levels or rapid onset, symptoms may include abdominal pain, bone pain, confusion, depression, weakness, kidney stones, or an abnormal heart rhythm including cardiac arrest. Most cases are due to primary hyperparathyroidism or cancer. Other causes include sarcoidosis, tuberculosis, Paget disease, multiple endocrine neoplasia (MEN), vitamin D toxicity, familial hypocalciuric hypercalcaemia, and certain medications such as lithium and hydrochlorothiazide. Diagnosis should generally include either a corrected calcium or ionized calcium level and be confirmed after a week. Specific changes, such as a shortened QT interval and prolonged PR interval, may be seen on an electrocardiogram (ECG). Treatment may include intravenous fluids, furosemide, calcitonin, or pamidronate in addition to treating the underlying cause. The evidence for furosemide, however, is poor. In those with very high levels hospitalization may be required. Hemodialysis may be used in those who do not respond to other treatments. In those with vitamin D toxicity steroids may be useful. Hypercalcemia is relatively common. Primary hyperparathyroidism occurs in between one and seven per thousand people and hypercalcemia occurs in about 2.7% of those with cancer.
Hyperparathyroidism is an increase in parathyroid hormone (PTH) levels in the blood. This occurs either from a disorder within the parathyroid glands (primary hyperparathyroidism) or disorder outside the parathyroid glands (secondary hyperparathyroidism) resulting in them making too much PTH. Most people with primary disease have no symptoms at the time of diagnosis. In those with symptoms the most common is kidney stones with other potential symptoms including weakness, depression, bone pains, confusion, and increased urination. Both types increase the risk of weak bones. Primary hyperparathyroidism in 80% of cases is due to a single benign tumor known as a parathyroid adenoma with most of the rest of the cases due to a multiple benign tumors. Rarely it may be due to parathyroid cancer. Secondary hyperparathyroidism typically occurs due to vitamin D deficiency, chronic kidney disease, or other causes of low blood calcium. Diagnosis of primary disease is by finding a high blood calcium and high PTH levels. Primary hyperparathyroidism may be cured by removing the adenoma or overactive parathyroid glands. In those without symptoms, mildly increased blood calcium levels, normal kidneys, and normal bone density monitoring may be all that is required. The medication cinacalcet may also be used to decrease PTH levels. In those with very high blood calcium levels treatment may include large amounts of intravenous normal saline. Low vitamin D levels should be corrected. Primary hyperparathyroidism is the most common form. In the developed world between one and four per thousand people are affected. It occurs three times more often in women than men and is typically diagnosed between the ages of 50 and 60. The disease was first described in the 1700s and in the late 1800s was determined to be related to the parathyroid. Surgery as a treatment was first carried out in 1925.
Hypocalcaemia, also spelled hypocalcemia, is low calcium levels in the blood serum. The normal range is 2.1–2.6 mmol/L (8.8–10.7 mg/dl, 4.3–5.2 mEq/L) with levels less than 2.1 mmol/l defined as hypocalcemia. Mildly low levels that develop slowly often have no symptoms. Otherwise symptoms may include numbness, muscle spasms, seizures, confusion, or cardiac arrest. Common causes include hypoparathyroidism and vitamin D deficiency. Others causes include kidney failure, pancreatitis, calcium channel blocker overdose, rhabdomyolysis, tumor lysis syndrome, and medications such as bisphosphonates. Diagnosis should generally be confirmed with a corrected calcium or ionized calcium level. Specific changes may be seen on an electrocardiogram (ECG). Initial treatment for severe disease is with intravenous calcium chloride and possibly magnesium sulfate. Other treatments may include vitamin D, magnesium, and calcium supplements. If due to hypoparathyroidism, hydrochlorothiazide, phosphate binders, and a low salt diet may also be recommended. About 18% of people who are being treated in hospital have hypocalcemia.