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Vaccines and Parsonage-Turner Syndrome/Brachial Neuritis: Understanding the Connection

The Greenwood Law Firm March 18, 2025

Parsonage-Turner Syndrome ("PTS"), also known as brachial neuritis, is a rare neurological condition that causes sudden, intense shoulder and upper arm pain, followed by muscle weakness and, in some cases, long-term functional impairment. While PTS is often linked to infections, surgeries, and autoimmune conditions, vaccine-related brachial neuritis has also been identified as a potential risk.

What Is Parsonage-Turner Syndrome?

PTS affects the brachial plexus, a network of nerves responsible for motor and sensory functions in the shoulder, arm, and hand. The condition typically progresses in three phases:

  • Acute Pain Phase: Sudden, severe pain in one shoulder that lasts from days to weeks.

  • Weakness Phase: Muscle weakness develops in the shoulder, upper arm, forearm, or hand, sometimes leading to muscle loss (atrophy). This phase can persist for months.

  • Recovery Phase: Gradual improvement in muscle strength and functionality, though some individuals experience lasting deficits.

Can Vaccines Cause Parsonage-Turner Syndrome?

Although PTS is rare, vaccine injuries have been associated with its onset. Medical research suggests that certain vaccines may trigger an abnormal immune response, leading to brachial plexus inflammation and nerve damage. Vaccines most commonly linked to PTS include:

  • Influenza (flu) vaccine

  • Tetanus, diphtheria, and pertussis (Tdap) vaccines

  • Pneumococcal vaccine

While large-scale studies have not definitively confirmed a direct causal relationship, the National Vaccine Injury Compensation Program (VICP) recognizes brachial neuritis as a compensable vaccine injury under certain conditions.

Recognizing the Symptoms of Vaccine-Related PTS

If you experience the following symptoms after a vaccination, you may have developed PTS:

  • Sudden, severe shoulder or upper arm pain

  • Muscle weakness in the shoulder, arm, or hand

  • Loss of reflexes or sensation in the affected limb

  • Limited range of motion

  • In rare cases, shortness of breath if the diaphragm is involved

Diagnosis and Treatment

A healthcare provider may diagnose PTS through clinical evaluation, electromyography (EMG) tests, and imaging scans like MRI or nerve ultrasound.

Although there is no specific cure for PTS, treatment focuses on symptom management, including:

  • Pain relief: Nonsteroidal anti-inflammatory drugs (NSAIDs), corticosteroids, or nerve pain medications like gabapentin.

  • Physical therapy: Stretching and strengthening exercises to regain muscle function.

  • Supportive care: In severe cases, nerve grafting or tendon transfers may be considered.

Sources:

  • Cleveland Clinic: Parsonage-Turner Syndrome

  • Health Resources and Services Administration: Brachial Neuritis and Influenza Vaccination Advisory Commission on Childhood Vaccines (ACCV), September 8, 2023.

Seeking Compensation for Vaccine-Related Brachial Neuritis (PTS)

If you developed brachial neuritis after a vaccine, you may be eligible for compensation through the National Vaccine Injury Compensation Program (VICP). This federal program provides financial assistance to individuals who experience vaccine-related injuries, covering:

  • Medical expenses

  • Lost wages

  • Pain and suffering

Contact a Vaccine Injury Lawyer Today

At Texas Vaccine Lawyers, a Division of The Greenwood Law Firm, we help clients navigate the VICP claims process to seek justice for vaccine-related injuries. Schedule a free consultation to discuss your case and explore your legal options.

Call us today or visit our website to learn more about your rights.