Primary Hyperparathyroidism: Symptoms, Diagnosis and Treatment Options

Primary hyperparathyroidism is a condition in which one or more of the parathyroid glands becomes overactive. This causes excess parathyroid hormone and often leads to raised calcium levels in the blood.

It is a common reason for patients to be referred to an endocrine surgeon, but it is also a condition that can be missed or under-recognised. Symptoms may be vague, blood test changes may be mild, and patients are sometimes told simply to “keep an eye on it” without understanding the long-term implications.

This guide explains what primary hyperparathyroidism is, what symptoms it can cause, how it is diagnosed, and when parathyroid surgery may be recommended.

Quick answer: what is primary hyperparathyroidism?

Primary hyperparathyroidism occurs when the problem starts within the parathyroid glands themselves. Most commonly, one gland develops a benign overgrowth called a parathyroid adenoma. Less commonly, more than one gland may be overactive.

The condition usually causes high calcium with raised or inappropriately normal PTH. It can affect the bones and kidneys and may cause tiredness, low mood, cognitive symptoms, muscle aches, abdominal symptoms or kidney stones.

Why does primary hyperparathyroidism happen?

In most patients, primary hyperparathyroidism is caused by a single benign parathyroid adenoma. This is not cancer. The gland produces too much parathyroid hormone independently of the body’s normal calcium control system.

In a smaller group of patients, more than one gland is overactive. This is known as multi-gland disease or parathyroid hyperplasia. This distinction matters because it can affect the type of operation needed.

Common symptoms

Symptoms vary. Some patients have no obvious symptoms, while others describe fatigue, brain fog, low mood, anxiety, poor sleep, constipation, abdominal discomfort, thirst, frequent urination, muscle weakness, bone pain or joint discomfort.

There may also be objective consequences such as osteoporosis, fragility fractures, kidney stones or reduced kidney function. For this reason, assessment should not be based only on how unwell someone feels.

Why symptoms can be difficult to recognise

Many symptoms of primary hyperparathyroidism are non-specific. Tiredness, low mood and poor concentration can have many causes. Patients may have been investigated for other conditions before calcium or PTH is recognised as the underlying issue.

A careful specialist review looks at the full picture: symptoms, blood tests, bone health, kidney history, imaging and personal priorities. The aim is not to operate on everyone, but to identify patients in whom treatment is likely to offer meaningful benefit and long-term protection.

How is primary hyperparathyroidism diagnosed?

Diagnosis is primarily biochemical. This means it is made from blood and sometimes urine tests, not from a scan alone. The typical pattern is raised calcium with raised or inappropriately normal parathyroid hormone.

Additional tests may include vitamin D, kidney function, phosphate, urinary calcium, bone density scanning and kidney imaging if stones are suspected. These tests help confirm the diagnosis and assess the effects of the condition.

What scans are used?

Once the diagnosis is established and surgery is being considered, localisation imaging may be arranged. Common tests include neck ultrasound and sestamibi scanning. In more complex cases, CT or other advanced imaging may be useful.

It is important to understand that a negative scan does not necessarily mean that primary hyperparathyroidism is absent. It may simply mean that the abnormal gland has not been localised. This is one reason why experience in parathyroid disease is important.

Treatment options

Treatment depends on the severity of the biochemical abnormality, symptoms, age, bone density, kidney function, kidney stone history and patient preference. Options may include monitoring, optimisation of vitamin D and hydration, medication in selected cases, or surgery.

Parathyroidectomy is the definitive treatment for primary hyperparathyroidism in suitable patients. If imaging clearly identifies a single abnormal gland, a focused or minimally invasive parathyroidectomy may be possible. If imaging is unclear or multi-gland disease is suspected, four-gland exploration may be recommended.

Why surgeon experience matters

Parathyroid surgery requires detailed knowledge of neck anatomy, thyroid disease, parathyroid embryology and recurrent laryngeal nerve safety. It also requires judgement: deciding when a focused operation is appropriate and when a more comprehensive exploration is safer.

At Hampshire ENT Clinics, parathyroid surgery is led by Mr Matthew Ward, Consultant ENT Surgeon with specialist expertise in thyroid and parathyroid surgery. Patients are assessed carefully with review of blood tests and imaging, and surgery is planned around the most likely disease pattern.

When to seek a specialist opinion

A specialist opinion is useful if you have confirmed or suspected primary hyperparathyroidism, raised calcium and PTH, kidney stones, osteoporosis, non-localising scans, recurrent disease after previous surgery, or co-existing thyroid nodules.

Hampshire ENT Clinics provides consultant-led thyroid and parathyroid assessment for patients from Hampshire, the South Coast and across the UK.

Frequently asked questions

Is primary hyperparathyroidism common?

Yes, it is one of the more common endocrine causes of raised calcium, particularly in adults. It is often found during routine blood tests.

Is a parathyroid adenoma cancer?

Almost always, no. A parathyroid adenoma is a benign overgrowth of one parathyroid gland. Parathyroid cancer is very rare.

Can I have normal PTH and still have hyperparathyroidism?

Yes. If calcium is high, PTH should usually be suppressed. A PTH result in the normal range may be inappropriate if calcium is repeatedly raised.

Can primary hyperparathyroidism cause osteoporosis?

Yes. Excess PTH can affect bone turnover and may contribute to reduced bone density or osteoporosis.

Can it cause kidney stones?

Yes. Kidney stones are one of the recognised complications of primary hyperparathyroidism.

Do all patients need surgery?

No. Some patients with mild disease may be monitored. Surgery is considered based on symptoms, calcium levels, bone density, kidney health, age and recognised criteria.

What is focused parathyroidectomy?

Focused parathyroidectomy is a targeted operation to remove a localised abnormal parathyroid gland, usually through a smaller incision.

What is four-gland exploration?

Four-gland exploration is an operation in which the surgeon assesses all parathyroid glands. It may be needed when scans are negative, unclear, or multi-gland disease is suspected.

Can parathyroid surgery improve symptoms?

Many patients report improvement in symptoms such as fatigue or brain fog after successful surgery, although the degree of improvement varies.

How do I arrange an appointment?

Patients can contact Hampshire ENT Clinics to arrange consultant-led thyroid and parathyroid assessment in Hampshire.