Small fiber neuropathy: a disabling and underrecognized syndrome

Area of Science:

• Neurology
• Clinical Medicine

Background:

• Small fiber neuropathy (SFN) significantly impacts patient quality of life.
• Diagnosis of SFN is often challenging and can be overlooked.
• Recent research identifies genetic mutations as a potential cause of SFN.

Purpose of the Study:

• To review the causes, clinical manifestations, diagnostic approaches, and treatment options for SFN.
• To highlight the difficulties in diagnosing SFN and its clinical relevance.
• To emphasize the need for increased awareness and diagnostic guidelines for SFN.

Main Methods:

• Review of current literature on small fiber neuropathy.
• Analysis of proposed clinical diagnostic criteria.
• Discussion of diagnostic limitations and the need for a combination of tests.
• Examination of treatment strategies, focusing on symptomatic relief.

Main Results:

• SFN leads to high morbidity and disabling symptoms.
• No definitive gold standard diagnostic test exists for SFN.
• Diagnosis requires correlating symptoms, neurological findings, and exclusion of large fiber involvement.
• Treatment is often symptomatic, with limited options even when the cause is known.

Conclusions:

• Increased clinical awareness of SFN and its overlapping symptoms with conditions like fibromyalgia is essential.
• Development of guidelines for a stepwise diagnostic workup is warranted.
• Timely recognition of SFN offers patient benefit, irrespective of available treatments.