Giant Cell Arteritis (Temporal Arteritis)

Giant cell arteritis, also known as temporal arteritis, is a serious inflammatory disease of the blood vessels that primarily affects older adults. Because it can lead to permanent vision loss if left untreated, early recognition and immediate treatment are essential.

In this guide, we explain what temporal arteritis is, its symptoms, causes, risk factors, diagnosis process, treatment options and long-term management including its link with polymyalgia rheumatica.

What is Temporal Arteritis (Giant Cell Arteritis)?

Temporal arteritis, medically called giant cell arteritis (GCA), is a type of vasculitis — a condition that causes inflammation of blood vessels.

It most commonly affects the large and medium-sized arteries in the head, particularly the temporal arteries, which run along the sides of the forehead. These arteries supply blood to:

• The scalp

• Jaw muscles

• The optic nerve

• Parts of the brain

When these arteries become inflamed, they swell and narrow. This reduces blood flow, limiting oxygen and nutrients reaching vital tissues. In severe cases, reduced blood supply to the optic nerve can cause sudden and permanent blindness.

Although the temporal arteries are most frequently involved, giant cell arteritis can also affect larger arteries such as the aorta. When this happens, serious complications may develop over time.

Temporal arteritis is considered a medical emergency when vision symptoms are present. Prompt temporal arteritis treatment can prevent irreversible damage.

Temporal Arteritis Symptoms

The most common and characteristic feature of giant cell arteritis is a new, persistent headache in people over 50 years old.

Common Temporal Arteritis Symptoms

• Persistent, severe headache, usually in the temple area

• A throbbing or continuous temporal arteritis headache pattern

• Scalp tenderness (pain when touching or brushing hair)

• Jaw pain while chewing or speaking (jaw claudication)

• Fever

• Fatigue

• Loss of appetite

• Unintentional weight loss

The headache may affect one or both sides of the head and can progressively worsen or fluctuate in intensity.

Temporal Arteritis and Vision Problems

One of the most serious aspects of the condition is temporal arteritis and vision problems. Eye-related symptoms may include:

• Blurred vision

• Double vision

• Temporary vision loss

• Sudden, painless loss of vision in one eye

Vision loss can become permanent if treatment is delayed. This is why early recognition of temporal arteritis symptoms is critical.

Other Associated Symptoms

Some patients also experience:

• Neck stiffness

• Shoulder and hip pain

• Muscle aches

• Facial swelling (sometimes described as temporal arteritis swelling face)

Many of these symptoms overlap with polymyalgia rheumatica, a related inflammatory condition.

When to Seek Immediate Medical Attention

You should seek urgent medical care if you experience:

• A new, severe headache after age 50

• Sudden changes in vision

• Double vision

• Jaw pain while chewing

• Scalp tenderness with headache

• Sudden vision loss

Giant cell arteritis can progress quickly. Starting treatment as soon as possible significantly reduces the risk of permanent blindness.

Diagnosing Temporal Arteritis

Temporal arteritis diagnosis can be challenging because early symptoms may resemble other conditions such as tension headaches or infections.

A thorough evaluation includes medical history, physical examination and specific tests.

Physical Examination

Your doctor will:

• Check your temporal arteries for tenderness or thickening

• Assess pulse strength in affected areas

• Examine your scalp for sensitivity

• Evaluate your vision

Inflamed arteries may feel hardened or cord-like under the skin.

Blood Tests

Blood tests help detect inflammation in the body. Common tests include:

• Erythrocyte sedimentation rate (ESR)

• C-reactive protein (CRP)

• Hemoglobin levels (to check for anemia)

Elevated ESR and CRP levels support a diagnosis of giant cell arteritis but are not definitive alone.

Imaging Studies

Imaging tests may help confirm inflammation or assess larger blood vessels:

• Doppler ultrasound of the temporal arteries

• Magnetic resonance angiography (MRA)

• CT scan

• PET scan (especially if aortic involvement is suspected)

Temporal Artery Biopsy

The most reliable method for confirming temporal arteritis diagnosis is a temporal artery biopsy.

In this minor outpatient procedure, a small segment of the temporal artery is removed under local anesthesia and examined under a microscope. The presence of inflammation and characteristic giant cells confirms the diagnosis.

Because inflammation may be patchy, a negative biopsy does not always completely exclude the condition.

Temporal Arteritis Causes

The exact temporal arteritis causes are not fully understood. Researchers believe giant cell arteritis is an autoimmune condition in which the immune system mistakenly attacks the artery walls. This abnormal immune response leads to inflammation and narrowing of the vessels. Potential contributing factors include:

• Genetic predisposition

• Age-related immune system changes

• Environmental triggers

• Immune system dysregulation

Temporal arteritis is not contagious.

Temporal Arteritis Risk Factors

Several factors increase the likelihood of developing giant cell arteritis:

• Age over 50 years

• Peak incidence between ages 70 and 80

• Female sex (women are affected about twice as often as men)

• Northern European ancestry

• History of polymyalgia rheumatica

• Family history of the condition

Although relatively rare, giant cell arteritis is one of the more common types of vasculitis in older adults.

Temporal Arteritis Treatment Options

Immediate treatment is essential to prevent complications.

Corticosteroid Therapy

The mainstay of temporal arteritis steroid treatment is high-dose corticosteroids, usually prednisone.

• Typical starting dose: 40–60 mg per day

• Higher intravenous doses may be used if vision symptoms are present

Patients often begin to feel better within a few days of starting treatment. Treatment generally continues for one to two years or longer. The dose is gradually reduced over time to the lowest effective level. Relapses may occur during tapering, and dosage adjustments may be necessary.

Biologic Therapy

In some cases, a biologic medication such as tocilizumab may be prescribed. This medication can help reduce inflammation and lower the required steroid dose.

Managing Temporal Arteritis Side Effects

Long-term steroid use may cause side effects, including:

• Osteoporosis

• High blood pressure

• High blood sugar

• Weight gain

• Muscle weakness

• Increased infection risk

• Cataracts

To reduce risks, doctors may recommend:

• Bone density monitoring

• Calcium and vitamin D supplementation

• Blood pressure and blood sugar monitoring

• Lifestyle adjustments

Regular follow-up appointments are essential for safe management.

Potential Complications of Untreated Temporal Arteritis

Without proper treatment, giant cell arteritis can cause serious complications.

Temporal Arteritis Complications

• Permanent blindness

• Stroke

• Aortic aneurysm

• Aortic inflammation (aortitis)

• Transient ischemic attacks

An aortic aneurysm may develop years after diagnosis, so long-term monitoring is important even after symptoms improve. Early temporal arteritis diagnosis and treatment dramatically reduce these risks.

Temporal Arteritis and Polymyalgia Rheumatica (PMR)

There is a strong relationship between temporal arteritis and polymyalgia rheumatica (PMR).

Polymyalgia rheumatica causes:

• Shoulder stiffness

• Hip pain

• Morning stiffness

• Fatigue

Approximately 40–60% of patients with giant cell arteritis also have PMR. Conversely, some patients with PMR may later develop giant cell arteritis. Both conditions respond well to corticosteroid therapy, although treatment plans may differ. Recognizing this overlap helps ensure accurate diagnosis and appropriate management.

Living with Temporal Arteritis

With early treatment, the prognosis for giant cell arteritis is generally favorable. However, long-term monitoring and lifestyle adjustments are important.

• Attend regular medical check-ups
  
• Monitor for new headaches or vision changes
  
• Maintain a balanced diet
  
• Engage in regular weight-bearing exercise
  
• Protect bone health
  
• Take medications exactly as prescribed
  
• Discuss aspirin use with your doctor if recommended

Because steroid therapy may continue for months or years, understanding potential temporal arteritis side effects is crucial.

Emotional Support

Living with a chronic inflammatory condition can be stressful. Education, clear communication with your healthcare team and family support play an important role in coping successfully.

Expert Care for Giant Cell Arteritis at Medical Park

Giant cell arteritis is a medical emergency when vision symptoms are present. Because the condition can progress rapidly and lead to irreversible complications, timely evaluation by experienced specialists is essential. At Medical Park, patients benefit from a multidisciplinary approach involving rheumatology, neurology and ophthalmology, ensuring that vascular inflammation and potential eye involvement are assessed simultaneously. Our experienced ophthalmologists play a critical role in evaluating temporal arteritis and vision problems, performing urgent eye examinations and helping prevent permanent vision loss. From detailed clinical assessment and advanced imaging to accurate temporal arteritis diagnosis and long-term follow-up, every stage of care is carefully coordinated.

Early initiation of temporal arteritis treatment — particularly corticosteroid therapy — is crucial in preventing blindness and other serious vascular complications. Ongoing monitoring is equally important to manage relapses, adjust medications safely and minimize potential treatment-related side effects. If you develop a new, persistent headache after age 50, jaw pain while chewing, scalp tenderness or any sudden visual changes, seek medical attention without delay. Prompt medical care can protect your vision and significantly improve outcomes. For comprehensive evaluation and personalized care, you can consult the expert teams at Medical Park.