Neurosarcoidosis

Neurosarcoidosis is a rare condition where clusters of inflammatory cells, called granulomas, form in the central nervous system (CNS). The CNS includes the brain, spinal cord, and cranial nerves, which control many body functions.

Most people with neurosarcoidosis also have sarcoidosis in other organs, such as the lungs or lymph nodes. Although a subset of patients can have isolated neurosarcoidosis.

Unlike other neurological disorders like multiple sclerosis, neurosarcoidosis is caused by inflammation from the body’s immune system, not by nerve damage or loss of myelin. Symptoms can affect many parts of the nervous system, making diagnosis and treatment complex. The condition may impact the spinal cord, cranial nerves (such as those controlling the face and eyes) or the brain itself.

Neurosarcoidosis symptoms can vary widely, but early signs often include:

Nerve-related symptoms (cranial neuropathy):

• Facial weakness or drooping
• Trouble moving the eyes
• Vision changes (if the optic nerve is affected)

Nerve and spinal cord involvement:

• Numbness or tingling in the arms and legs
• Pain in the limbs
• Peripheral neuropathy or spinal cord disease

Movement and coordination issues:

• Muscle weakness
• Difficulty walking
• Loss of balance

Other neurological symptoms:

• Headaches
• Seizures

Hormonal effects:

• Pituitary gland abnormalities leading to hormone imbalances

Neurosarcoidosis occurs when the immune system forms clusters of inflammatory cells (granulomas) in the nervous system. These can affect the brain, spinal cord, or nerves. Most people with neurosarcoidosis also have sarcoidosis in other organs, such as the lungs.

The exact cause of sarcoidosis is unknown, but experts believe it involves a combination of genetic and environmental factors.

Genetic factors:

• Some people may inherit a higher risk of developing sarcoidosis
• Having a family history of sarcoidosis increases risk
• Certain ethnic groups are more likely to develop the condition

Environmental factors:

• Exposure to certain dusts or chemicals
• Possible triggers from infections

Who is at higher risk?

• People who already have systemic sarcoidosis
• Those with more severe or widespread disease may be more likely to develop nervous system involvement

Important to know: Neurosarcoidosis is rare. Not everyone with sarcoidosis will develop symptoms in the nervous system.

Diagnosing neurosarcoidosis involves several steps to confirm that sarcoidosis is affecting the nervous system.

• Initial evaluation: A doctor begins with a detailed medical history and a neurological exam to check for muscle weakness, changes in sensation, vision problems, or balance issues. Because these symptoms can mimic other conditions, careful evaluation is essential.
• Imaging tests: MRI (magnetic resonance imaging) is commonly used to look for inflammation or lesions in the brain and spinal cord.
• Lab testing: A lumbar puncture (spinal tap) may be performed to collect cerebrospinal fluid (CSF), which is analyzed for signs of inflammation or abnormal cells that support the diagnosis.

Doctors classify cases into three categories:

• Definite neurosarcoidosis
• Probable neurosarcoidosis
• Possible neurosarcoidosis

Why diagnosis can be complex because symptoms often overlap with other neurological conditions. Other causes must be carefully ruled out.

UC Health takes a team-based approach. A multidisciplinary team may be involved, including:

• Neurology
• Pulmonology
• Cardiology
• Radiology

This collaborative approach helps ensure the most accurate diagnosis.

Corticosteroids are often the first medicine used to treat neurosarcoidosis. These drugs help lower inflammation in the brain, spinal cord, or nerves. Based on disease severity, doctors may add immunosuppressive drugs, such as methotrexate, azathioprine, or biologics, that work by calming the immune system to prevent further nerve damage.

Treatment plans are made for each person based on their symptoms, how much the nervous system is affected, and how they respond to medicines. Regular check-ups are important to watch for side effects and to adjust treatment as needed. 

Contact a healthcare provider if you notice new neurological symptoms, such as numbness, weakness or trouble seeing. People with a known sarcoidosis diagnosis should be especially alert for signs that may indicate nervous system involvement, including:

• Sudden facial drooping
• Vision loss
• Seizures
• Severe headaches

These symptoms can signal urgent complications and require prompt medical attention. If symptoms worsen or develop suddenly, seek emergency care right away.

Living with neurosarcoidosis often means managing symptoms that can change over time. Some people experience muscle weakness, numbness, or trouble with balance. These symptoms can affect daily routines, work, and relationships.

Support from a care team can help improve quality of life. Physical and occupational therapy may help with movement, strength, and daily tasks. Counseling or support groups can offer ways to cope with stress, anxiety, or depression linked to nervous system involvement.

Staying active, eating well, and following treatment plans support long-term health. Regular check-ins with providers help track symptoms and adjust care as needed. Many people find that connecting with others who have sarcoidosis brings comfort and practical advice for daily living.

At the Osher Center for Integrative Health, our teams work to combine modern medicine with evidence-based therapies that support your body, mind and spirit. From massage therapy and acupuncture to mindfulness and movement-based care, each offering supports your overall well-being and empowers long-term health.

With appropriate treatment, prognosis can be favorable with a positive quality of life for patients.

UC Health Expertise

As the only health system in the region with the experience and expertise to treat neurosarcoidosis, UC Health brings together neurology, internal medicine, neuroradiologists and spine specialists to care for people with neurosarcoidosis. Teams use advanced imaging and lab testing to find even subtle signs of nervous system involvement. Patients benefit from the latest therapies for sarcoidosis affecting the brain, spinal cord, and nerves.

In addition, our team of pulmonologists are leaders in neurosarcoidosis, uniquely positioned to treat the condition.

If you or a loved one is experiencing unexplained neurological changes, it’s critical to seek expert care—early treatment can reduce the risk of permanent damage. Contact the team at the UC Gardner Neuroscience Institute by calling 513-475-8730.