Small Fiber Neuropathy in Sarcoidosis.

Area of Science:

• Pulmonary Medicine
• Neurology
• Rheumatology

Background:

• Sarcoidosis is a systemic inflammatory disease primarily affecting lungs and lymph nodes.
• It presents with varied symptoms, including fatigue, cognitive issues, and pain.
• Small fiber neuropathy (SFN) is a significant cause of pain in sarcoidosis, affecting 33-86% of patients.

Purpose of the Study:

• To review symptoms, diagnostic methods, and treatments for SFN and autonomic dysfunction in sarcoidosis.
• To highlight the challenges in diagnosing and managing SFN in sarcoidosis patients.

Main Methods:

• Literature review of studies on sarcoidosis, SFN, and autonomic dysfunction.
• Analysis of diagnostic criteria and current treatment strategies.
• Synthesis of information on symptom presentation and patient impact.

Main Results:

• SFN in sarcoidosis manifests as sensory, autonomic, and general symptoms, with heterogeneous presentation.
• Diagnosis relies on clinical signs, nerve conduction studies, quantitative sensory testing, or skin biopsy, as a gold standard is lacking.
• Autonomic dysfunction is under-recognized and difficult to diagnose, negatively impacting quality of life.

Conclusions:

• Sarcoidosis-associated SFN and autonomic dysfunction require specific diagnostic and management approaches.
• Existing sarcoidosis treatments are ineffective for SFN symptoms.
• Further research is needed for effective SFN and autonomic dysfunction treatments in sarcoidosis.