Tertiary Hyperparathyroidism

What is Tertiary Hyperparathyroidism?

Tertiary hyperparathyroidism is a rare condition where your parathyroid glands become overactive and produce too much parathyroid hormone, or PTH. Your parathyroid glands are four tiny glands in your neck that help control calcium levels in your blood. When these glands work too hard for too long, they can grow larger and start working on their own.

This condition usually develops after years of chronic kidney disease. When your kidneys stop working properly, your parathyroid glands try to help by making more PTH. Over time, the glands become enlarged and lose the ability to turn off. They keep producing high levels of PTH even after your calcium levels rise too high.

Unlike other forms of hyperparathyroidism, tertiary hyperparathyroidism means your parathyroid glands have become autonomous. They no longer respond to normal signals from your body. This leads to persistently high calcium levels in your blood, which can damage your bones, kidneys, and other organs if left untreated.

Parathyroid Hormone (PTH), Intact

Pinpoint the cause of bone pain
Reveal why you're feeling fatigued
Clarify calcium imbalance issues

^$69

Prime Check

Checks your overall health
Detects common illnesses early
Monitors vital organ functions

^$499

Bone loss panel

Checks bone health indicators.
Measures nutrients for bone strength.
Assesses risk of bone thinning.

^$1,039

Symptoms

Bone pain and fractures that happen easily
Kidney stones that cause severe pain
Weakness and fatigue that interferes with daily activities
Nausea, vomiting, and loss of appetite
Confusion or difficulty concentrating
Constipation and digestive problems
Excessive thirst and frequent urination
Muscle weakness, especially in your legs
Depression and mood changes
Heart rhythm problems in severe cases

Some people with tertiary hyperparathyroidism have no obvious symptoms early on. The condition may only be found through blood tests showing high calcium and PTH levels. Others experience severe symptoms that affect their quality of life significantly.

Causes and risk factors

Tertiary hyperparathyroidism almost always develops after long-standing secondary hyperparathyroidism caused by chronic kidney disease. When your kidneys fail, they cannot activate vitamin D or remove phosphate from your blood properly. This causes your calcium levels to drop, which triggers your parathyroid glands to make more PTH. After years of this overactivity, your parathyroid glands become enlarged and start working independently.

Risk factors include having chronic kidney disease for many years, especially if you are on dialysis. People who have received a kidney transplant can also develop this condition if their parathyroid glands were overactive before the transplant. Poor management of calcium, phosphate, and vitamin D levels during kidney disease treatment increases your risk. The longer you have kidney disease without proper treatment, the higher your chance of developing this condition.

How it's diagnosed

Tertiary hyperparathyroidism is diagnosed through blood tests that measure your parathyroid hormone and calcium levels. Your doctor will look for persistently high PTH with high calcium levels, especially if you have a history of chronic kidney disease. Rite Aid offers parathyroid hormone testing as an add-on to our preventive health panel, making it easy to monitor your PTH levels at Quest Diagnostics locations nationwide.

Your doctor may also order additional tests to check your phosphate, vitamin D, and kidney function. Imaging tests like ultrasound or sestamibi scans can help locate enlarged parathyroid glands. A bone density scan may show whether high calcium has weakened your bones. Your medical history, especially any history of kidney disease or dialysis, helps confirm the diagnosis and rule out other causes of high calcium.

Treatment options

Surgery to remove overactive parathyroid glands is often the most effective treatment
Medications called calcimimetics help lower PTH and calcium levels without surgery
Managing phosphate intake through diet and phosphate binders
Ensuring adequate but not excessive vitamin D levels
Drinking plenty of water to prevent kidney stones
Regular monitoring of calcium, PTH, and kidney function
Working with a nephrologist who specializes in kidney and mineral disorders
Bone-strengthening medications if you have developed osteoporosis
Adjusting dialysis treatments if you are still on dialysis

Frequently asked questions

Secondary hyperparathyroidism occurs when your parathyroid glands work harder to respond to low calcium, usually from kidney disease. Tertiary hyperparathyroidism develops when those glands become enlarged and autonomous after years of overactivity. In tertiary disease, your glands keep making too much PTH even when calcium levels are high.

Medications can help manage tertiary hyperparathyroidism, but they usually do not cure it completely. Calcimimetic drugs like cinacalcet can lower PTH and calcium levels effectively. However, surgery to remove overactive parathyroid glands is often the only way to achieve a permanent cure.

People with chronic kidney disease should have their PTH levels checked every 3 to 6 months, depending on disease stage. More frequent testing may be needed if you are on dialysis or if your levels are changing rapidly. Regular monitoring helps catch the transition from secondary to tertiary hyperparathyroidism early.

Untreated tertiary hyperparathyroidism can lead to serious complications including severe bone disease and fractures. High calcium levels can damage your kidneys further, cause kidney stones, and affect your heart rhythm. Some people develop calcium deposits in their blood vessels, skin, and other soft tissues.

About 30 to 50 percent of kidney transplant patients have some degree of hyperparathyroidism after transplant. In most cases, PTH levels improve over time as the new kidney starts working. However, some patients develop persistent tertiary hyperparathyroidism that requires treatment.

Limiting foods high in phosphate, like dairy products, processed foods, and cola drinks, can help. Working with a renal dietitian is important because you need to balance protein intake with phosphate control. Some people also need to moderate calcium intake, depending on their blood levels.

Taking too much vitamin D can raise your calcium levels higher, which may worsen symptoms. However, some people need active vitamin D under medical supervision to help manage their condition. Never take vitamin D supplements without talking to your doctor if you have this condition.

Surgery is successful in about 90 to 95 percent of cases when performed by an experienced surgeon. Most people see their PTH and calcium levels return to normal within days after surgery. The main risk is removing too much parathyroid tissue, which can cause low calcium levels that need lifelong treatment.

Calcium levels above 12 milligrams per deciliter are considered severely elevated and may require urgent treatment. Levels above 14 can cause life-threatening complications like severe confusion, heart problems, and kidney failure. Normal calcium levels range from 8.5 to 10.5 milligrams per deciliter.

Tertiary hyperparathyroidism usually does not improve even if kidney function gets better, because the parathyroid glands have become autonomous. This is different from secondary hyperparathyroidism, which often improves with better kidney function. Once glands are autonomous, they typically need medication or surgery to control them.