[Small fiber neuropathy in systemic autoimmune diseases]

Area of Science:

• Neurology
• Neuroscience
• Immunology

Background:

• Small fiber neuropathy (SFN) is characterized by damage to small-caliber nerve fibers, including unmyelinated C fibers and myelinated A-delta fibers.
• SFN symptoms typically manifest as sensory disturbances such as paresthesia, dysesthesia, burning pain, and protopathic deficits, occasionally accompanied by dysautonomia.
• The etiology of SFN is diverse, broadly categorized into idiopathic, toxic, metabolic, immunological, infectious, and hereditary causes.

Purpose of the Study:

• To outline the diagnostic methodology for small fiber neuropathy.
• To discuss the most prevalent autoimmune etiologies contributing to SFN.
• To present key aspects of the therapeutic management for SFN, particularly autoimmune-related cases.

Main Methods:

• Review of diagnostic criteria and clinical presentation of SFN.
• Analysis of literature on autoimmune diseases associated with SFN.
• Synthesis of current therapeutic approaches for managing SFN.

Main Results:

• SFN diagnosis relies on a combination of clinical assessment and specific tests to identify small fiber damage.
• Autoimmune conditions represent a significant and treatable category of SFN causes.
• Effective management strategies exist for SFN, especially when linked to autoimmune processes.

Conclusions:

• A systematic diagnostic approach is crucial for identifying SFN and its underlying causes.
• Recognizing and treating autoimmune etiologies can significantly improve SFN outcomes.
• Comprehensive management plans are essential for addressing the complex symptoms and causes of SFN.