Fibromyalgia and small fiber neuropathy: the plot thickens!

Area of Science:

• Neurology
• Rheumatology
• Pain Medicine

Background:

• Fibromyalgia is often considered a centralized pain syndrome.
• An alternative hypothesis suggests fibromyalgia is a stress-related dysautonomia with neuropathic pain.
• Dorsal root ganglia are implicated as key autonomic-nociceptive short-circuit sites.

Purpose of the Study:

• To discuss the implications of small fiber neuropathy in fibromyalgia.
• To explore how this finding could renovate the concept, diagnosis, and treatment of fibromyalgia.
• To support the dysautonomia-neuropathic hypothesis of fibromyalgia.

Main Methods:

• Review of current literature on small fiber neuropathy in fibromyalgia.
• Discussion of diagnostic advancements including skin biopsy and corneal confocal microscopy.
• Exploration of potential therapeutic targets such as sodium channel blockers and immunoglobulin therapy.

Main Results:

• Small fiber neuropathy is present in a significant subgroup of fibromyalgia patients.
• This finding reinforces the dysautonomia-neuropathic hypothesis over the centralized pain syndrome model.
• Neurological evaluation is crucial for understanding fibromyalgia.

Conclusions:

• Fibromyalgia may be primarily a neurological disorder.
• Skin biopsy and corneal confocal microscopy show promise as diagnostic tools.
• Targeting dorsal root ganglia and enhancing autonomic nervous system resilience are key therapeutic strategies.