Your parathyroid glands make parathyroid hormone (PTH). Primary hyperparathyroidism is when one or more of the parathyroid glands makes too much PTH. This can lead to bone tissue loss, high blood levels of calcium, and kidney stones. This condition is more common in women than in men. Sometimes primary hyperparathyroidism is part of a hereditary condition that involves tumors in many parts of the body.
PTH keeps blood calcium levels from going too low. It does this by releasing calcium from bones and reabsorbing calcium from the kidney. The hormone also conserves calcium that would be given off by the kidneys. And it increases how much calcium is absorbed from food. Too much PTH causes too much calcium to be released from bone. And the level of calcium in your blood rises.
In some cases, no cause can be found. Some known causes include non-cancer (benign) tumors on the parathyroid glands, or enlargement of the glands. When there is a benign tumor in a parathyroid gland, it is called a parathyroid adenoma. When more than one gland becomes enlarged, it is called parathyroid hyperplasia. Both of these conditions are noncancer. In rare cases, it can be caused by a tumor that is cancer or a cyst that is noncancer.
Each person may experience symptoms differently. Symptoms of too much calcium in the blood may include:
Other serious symptoms may include:
The symptoms of primary hyperparathyroidism may look like other health problems. Always talk with your healthcare provider for a diagnosis.
The condition may not have any symptoms or complications. Sometimes this problem is found during a routine blood test as part of a physical exam.
You'll likely have additional blood tests done to check the levels of calcium and PTH. You'll also likely have urine tests to check on the level of calcium in your urine and to check your kidney function. Your healthcare provider may want to scan your thyroid. You may also have an ultrasound study of your neck. This could find a parathyroid adenoma. You may also have dual energy X-ray absorptiometry. This test is also called bone densitometry (or DXA scan). It's done to figure out bone density and to reveal loss of bone tissue (as can occur with hyperparathyroidism.) It's also used to help your healthcare provider keep an eye on the condition. Testing can also help decide if surgery may be needed.
Treatment will depend on your symptoms, age, and general health. It will also depend on how severe the condition is.
Surgery to remove the affected gland may be needed. Treatment may include medicines, regular bone densitometry testing to reveal loss of bone tissue, and follow-up tests of kidney function.
Tips to help you get the most from a visit to your healthcare provider: