Surgical Expertise

Endocrine Surgery

Our practice provides comprehensive care for thyroid and parathyroid disorders — guiding each patient through their diagnosis and treatment plan with clear communication and lots of support.

Understanding the Glands

The Thyroid & Parathyroid Glands

The thyroid and parathyroid glands play vital roles in regulating your body's functions. Understanding how they work helps explain why surgery may sometimes be needed.

Two distinct gland systems

The Thyroid Gland

Is an Endocrine gland that is shaped like a butterfly sitting at the front of your neck, just below where you swallow.

The thyroid's job is to make hormones — chemical messengers that travel through your blood and tell your body how fast to work. These hormones control things like your energy levels, how quickly your heart beats, your weight, your body temperature, and even your mood.

When the thyroid makes too much or too little of these hormones — or when a suspicious lump grows inside it — that's when we consider thyroid surgery.

The Parathyroid Glands

Despite having a very similar name, the parathyroid glands are separate from the thyroid and do a totally different job.

There are four parathyroid glands, each about the size of a green pea, tucked behind the thyroid gland. Their one and only job is to keep the amount of calcium in your blood at just the right level.

Calcium isn't just important for your bones and teeth — it also helps your muscles contract (including your heart muscle) and keeps your nerves working properly. If your parathyroid glands produce too much of their hormone (called PTH), your calcium levels go too high — and that can cause a whole range of problems, from kidney stones to weak bones to tiredness and brain fog.

Thyroid Surgery

Two approaches to thyroid surgery — tailored to your individual situation

Dr Kowsi will discuss the most appropriate type of surgery for you based on your diagnosis, the size and nature of any nodules, and your overall health.

Surgical Procedures

Hemi or total — understanding your options

The choice between a hemithyroidectomy and a total thyroidectomy depends on your specific diagnosis. Dr Kowsi will explain both options clearly so you can make an informed decision.

Hemithyroidectomy

Hemithyroidectomy

A hemithyroidectomy means removing one half (one lobe) of the thyroid gland. Think of it like removing one wing of the butterfly. The other half stays in place and keeps working.

Common reasons for this surgery:

  • A suspicious lump (nodule) on one side of the thyroid that needs to be fully examined
  • A small, low-risk thyroid cancer (usually less than 2 cm)
  • A benign (non-cancerous) lump that is causing discomfort, difficulty swallowing, or a feeling of pressure in the neck
  • An overactive nodule on one side making too much thyroid hormone

The great advantage of this surgery is that the remaining half of the thyroid often produces enough hormone on its own, meaning many patients don’t need to take thyroid hormone tablets for the rest of their lives. Dr Kowsi will check your thyroid function (blood test) to ensure the remaining thyroid gland has adequate function.

Total Thyroidectomy

Total Thyroidectomy

A total thyroidectomy means removing the entire thyroid gland. After this surgery, your body can no longer make its own thyroid hormones, so you will take a small daily tablet (thyroxine) for the rest of your life to replace them.

Common reasons for this surgery:

  • A thyroid cancer that is larger (greater than 2–4 cm), higher risk, or involves both sides of the gland
  • Cancer that requires radioactive iodine (RAI) treatment after surgery — the whole gland needs to be removed for this to work
  • A large goitre (enlarged thyroid) pressing on the airway or oesophagus, making it hard to breathe or swallow
  • Graves’ disease — an autoimmune condition causing the thyroid to be overactive — that hasn’t responded to medication
  • Suspicious or cancerous nodules on both sides of the gland

Dr Kowsi will organise

  • Blood tests:To check your thyroid hormone levels (TSH, T3, T4), Parathyroid gland function (PTH) and calcium and general health
  • Ultrasound:A scan using sound waves to look at the size, shape, and appearance of any nodules
  • Fine Needle Aspiration Biopsy (FNAB):A very thin needle is used to take a small sample of cells from the nodule to check if it looks cancerous. Done under ultrasound guidance by a radiologist, it is usually quick with minimal discomfort.
  • Vocal cord check (laryngoscopy):A referral to ENT surgeon to look at your vocal cords movements with a small camera under local anaesthetic spray before surgery
  • If you have an overactive thyroid, medication may be given to bring your thyroid levels under control before the operation to make the surgery safer.
  • ECG (heart tracing)and other pre-anaesthetic tests: To make sure you are safe to have a general anaesthetic

Recovery

  • Most patients go home after 1–2 nights in hospital
  • Your throat may feel sore and swallowing may feel uncomfortable for a few days — this settles quickly
  • If a total thyroidectomy was performed then a blood test to check your calcium and PTH levels are done before you go home. Thyroxine will be started the day after surgery for patients who had total thyroidectomy.

Appointments & monitoring

  • Appointment with Dr Kowsi within 1–2 weeks to review your wound and pathology results
  • If the removed tissue confirms cancer, further treatment is discussed at a multidisciplinary team (MDT) meeting
  • Many patients do not need lifelong thyroid hormone tablets after a hemithyroidectomy, but thyroid function is monitored with a blood test several weeks after hemithyroidectomy.
  • If total thyroidectomy was performed then you will be started on thyroxine (thyroid hormone replacement) tablets before you go home
  • Follow-up blood tests at 4–6 weeks and then regularly to adjust your thyroxine dose
  • If surgery was for thyroid cancer, regular thyroglobulin blood tests and periodic neck ultrasounds monitor for any signs of recurrence.

General surgical risks

Every operation carries some general risks such as reactions to the anaesthetic, wound infection, bleeding, and blood clots.

Voice changes or hoarseness

  • The recurrent laryngeal nerve runs very close to the thyroid. Temporary voice changes occur in approximately 1–2% of cases; permanent injury is rare (less than 1%).
  • To protect this nerve, Dr Kowsi uses a technology called intraoperative nerve monitoring (IONM) — often referred to as the NIM (Nerve Integrity Monitor) system.

Low calcium

The parathyroid glands sit directly behind the thyroid and can occasionally be temporarily disturbed during surgery, causing a temporary drop in calcium levels. This is less common with hemithyroidectomy than total thyroidectomy and usually resolves within a few weeks with calcium supplements.

Bleeding (neck haematoma)

A collection of blood in the neck after surgery can occur in approximately 1% of cases.

Hypothyroidism

A small number of patients find the remaining half of the thyroid doesn’t produce enough hormone on its own, requiring lifelong thyroid hormone tablets.

Scar

A small horizontal scar in the neck is unavoidable. Most scars heal very well and become barely visible over time.

Need for further surgery

If the final pathology shows cancer is more extensive than anticipated, a completion thyroidectomy (removing the remaining lobe) may be recommended.
Parathyroid Surgery

Restoring calcium balance — with precision and care

Dr Kowsi will guide you through the investigation and surgical options most appropriate for your condition.

Parathyroid Surgery

Two types of parathyroid surgery

Dr Kowsi performs both minimally invasive and total parathyroid surgery. The approach depends on how many glands are affected and the underlying cause of your condition.

Minimally Invasive Parathyroidectomy (MIP)

A small, focused operation to remove one overactive parathyroid gland (adenoma). The standard treatment for primary hyperparathyroidism where one gland is producing too much PTH.

Total Parathyroidectomy

A more complex operation where all four parathyroid glands are removed. Reserved for serious or complex conditions where multiple glands are overactive.

What Dr Kowsi will arrange before surgery

Dr Kowsi will organise investigations as appropriate for your specific condition and type of surgery planned.

Minimally Invasive

Minimally Invasive Parathyroidectomy (MIP)

This is a small, focused operation to remove one overactive parathyroid gland (called an adenoma — a benign tumour). It is the most common type of parathyroid surgery and is the standard treatment for primary hyperparathyroidism, where one gland is producing too much PTH and causing calcium levels to become too high.

Common reasons for this surgery:

Calcium levels in the blood that are consistently too high
Kidney stones caused by too much calcium being filtered through the kidneys
Osteoporosis (thinning of the bones) or fragility fractures
Tiredness, brain fog, depression, muscle weakness, or excessive thirst and urination
Being under 50 years of age with confirmed primary hyperparathyroidism
Reduced kidney function related to high calcium

Total Parathyroidectomy

Total Parathyroidectomy

A total parathyroidectomy is a more complex operation where all four parathyroid glands are removed. It is reserved for more serious or complex conditions where multiple glands are overactive.

Common reasons for this surgery:

  • Secondary hyperparathyroidism — most commonly caused by long-term kidney disease, where all four glands become enlarged and overactive in response to persistently low calcium
  • Tertiary hyperparathyroidism — where the glands continue producing excess PTH even after the underlying problem (such as kidney disease) has been treated, for example after a kidney transplant
  • Multiple Endocrine Neoplasia (MEN1 or MEN2) — genetic conditions where multiple glands are affected at once
  • Suspected parathyroid cancer (rare)

A small piece of parathyroid tissue is often re-implanted into the forearm muscle during this surgery (called autotransplantation), giving the body a small source of PTH to help regulate calcium going forward.

 

Investigations

  • Blood tests:Calcium, PTH, vitamin D, kidney function, and phosphate levels
  • Ultrasound of the neck:The first scan used to identify which gland is overactive
  • Sestamibi scan:A nuclear medicine scan where a small amount of a radioactive tracer is injected — it highlights the overactive parathyroid gland on imaging, helping the surgeon find it precisely
  • 4D-CT scan:A specialised CT scan sometimes used as a second imaging method if the sestamibi scan results are not clear enough.
  • Bone density scan (DEXA):To check whether calcium loss has affected your bones

Recovery & monitoring

  • Most patients go home the next day
  • Blood tests for calcium and PTH are checked in the hours after surgery and before discharge to confirm the overactive gland has been successfully removed.
  • Calcium levels are rechecked at 3–6 months after surgery to confirm the cure.
  • Some patients experience a temporary drop in calcium after surgery as the bones start re-absorbing calcium — calcium and vitamin D supplements are prescribed for this.
  • Regular blood test monitoring continues for 12 months to confirm long-term success

Recovery & monitoring

  • Calcium levels are closely monitored in hospital for at least 24 hours after surgery
  • Calcium and vitamin D (calcitriol) supplements are started immediately and continued for weeks to months
  • Regular blood test monitoring of calcium, PTH, and vitamin D continues long-term

Voice changes or hoarseness

The recurrent laryngeal nerve passes close to the parathyroid glands. Temporary hoarseness occurs in less than 1% of cases; permanent injury is very rare. NIM nerve monitoring is used to help protect this nerve.

Low calcium (hypocalcaemia)

Occasionally, the other healthy parathyroid glands can be temporarily disturbed during surgery, causing calcium levels to drop. This usually resolves within weeks with calcium and vitamin D supplements.

Bleeding (neck haematoma)

Uncommon.

Unsuccessful surgery

In rare cases, the overactive gland cannot be found at the time of surgery if the pre-operative scans did not localise it accurately — further imaging or a second procedure may be required.

Persistent or recurrent hyperparathyroidism

In a small number of cases (less than 5%), calcium levels may not fully normalise, or hyperparathyroidism may return years later if additional glands become overactive.

General surgical risks

Anaesthetic reactions, wound infection, scar, blood clots.
 

Need for further surgery

If the final pathology shows cancer is more extensive than anticipated, a completion thyroidectomy (removing the remaining lobe) may be recommended.

Permanent low calcium (hypoparathyroidism)

The most significant risk of this procedure. Without functioning parathyroid glands, calcium levels can fall, requiring lifelong calcium and calcitriol supplements. The autotransplanted tissue in the forearm is designed to help prevent this, but it may not always function sufficiently.

"Hungry bone syndrome"

After surgery, the bones may rapidly absorb large amounts of calcium from the bloodstream, causing a significant and sometimes prolonged drop in calcium levels. This is managed with high-dose calcium and vitamin D supplementation.

Recurrent hyperparathyroidism

If the autotransplanted forearm tissue becomes overly active over time, hyperparathyroidism may recur — this can usually be managed with a minor procedure under local anaesthetic.

You’re not alone in this journey

Every patient's situation is unique. Dr Kowsi takes the time to understand your circumstances and tailor a treatment plan to help you make confident decisions and support you through your journey.