Parsonage-Turner Syndrome and Hereditary Brachial Plexus Neuropathy

Area of Science:

• Neurology
• Genetics
• Immunology

Background:

• Parsonage-Turner syndrome and hereditary brachial plexus neuropathy (HBPN) share symptoms of acute shoulder/arm pain, weakness, and muscle atrophy.
• SEPT9 gene mutations are the sole known cause of HBPN.
• The combined incidence is 3-100 per 100,000 person-years.

Purpose of the Study:

• To review current diagnostic tools and treatments for Parsonage-Turner syndrome and HBPN.
• To highlight new associations and interventions for these neuropathies.
• To provide an update on managing these challenging brachial plexus disorders.

Main Methods:

• Review of diagnostic modalities including electrodiagnostics, ultrasound (diaphragm), and MRI.
• Analysis of nerve biopsy findings suggesting an inflammatory-immune component.
• Evaluation of treatment responses to steroids, physical therapy, and other interventions.

Main Results:

• Modern diagnostics differentiate these conditions from mimics; ultrasound and MRI reveal specific nerve/muscle changes.
• Inflammatory/immune factors are implicated, with various triggers identified.
• High-dose steroids offer initial pain relief, but long-term recovery depends on time, physical therapy, and non-narcotic pain management.

Conclusions:

• Effective management involves rehabilitation focusing on function, pain control, and contracture prevention.
• Recurrent attacks in HBPN may be mitigated by prophylactic treatments.
• While residual deficits are rare, interventions like tendon transfers can address persistent weakness.