A condition affecting the small sensory nerve fibres, causing burning pain, numbness, and autonomic dysfunction.
✦ AI summary
Small fiber neuropathy (SFN) is described as a difficult-to-manage condition causing pain and autonomic symptoms, which places a real burden on people's lives — one study found that even after getting an official diagnosis, patients' pain, healthcare costs, and quality of life didn't improve, though they did see fewer specialist visits and better understanding of their health [2]. Research is exploring various causes: some cases are linked to genetic factors like a variant in the TRPA1 pain-sensing channel [4], to repeat expansions in the RFC1 gene found more often in people with idiopathic peripheral neuropathy including SFN [7], and to genetic influences on pain thresholds more broadly [6]. A subset of patients may have an autoimmune component, with rare antibodies (MX1, DBNL) identified in some, though these appear uncommon and their role is still unclear [10]. SFN also shows up as part of other conditions — it's more severe and linked to stronger autonomic problems in hypermobile Ehlers-Danlos syndrome compared with idiopathic SFN [5][11], is a recognized contributor to poor quality of life in sarcoidosis [3][9], and skin biopsy findings in Fabry disease
This is an AI-generated summary of the sources below — not medical advice. Always talk to a doctor or pharmacist about your own situation.
Pragmatic approaches to improve the care of patients with sarcoidosis.
Sarcoidosis is associated with an increasing global burden, driven by rising prevalence, severe organ involvement, treatment-related morbidity, and substantial impairment in quality of life (QoL). Despite advances in diagnostics and therapeutics, important barriers continue to limit timely, equitabl…
dysautonomiasarcoidosissmall fiber neuropathybrain fog
The Burden of Small Fiber Neuropathy: Changes in Pain, Costs, and Quality of Life Before and After Diagnosis.
Small fiber neuropathy (SFN) is a peripheral neuropathy causing neuropathic pain, reduced quality of life (QoL), and high societal costs. Previous studies assessed these societal costs before a definitive diagnosis was established, leaving it unclear whether diagnostic confirmation affects costs, pa…
Use of Intravenous Immunoglobulin Therapy for Small Fiber Neuropathy: A Systematic Review of Current Clinical Evidence.
Small fiber neuropathy (SFN) is a clinically heterogeneous and difficult-to-manage condition for which intravenous immunoglobulin (IVIG) is increasingly used despite inconsistent evidence and substantial cost. We therefore systematically evaluated the clinical effectiveness of IVIG in SFN, with atte…
Automated quantification of skin Gb3 load and white matter lesion assessment in Fabry disease.
Fabry disease (FD) is an X-linked lysosomal storage disorder characterized by cellular accumulation of globotriaosylceramide (Gb3). We investigated dermal Gb3 load as a potential surrogate marker for systemic FD manifestations by applying an automated image analysis pipeline to skin punch biopsies f…
Homozygous RFC1 AAGGG Repeat Expansions Are Common in Idiopathic Peripheral Neuropathy.
Biallelic intronic AAGGG repeat expansions in RFC1 cause cerebellar ataxia with neuropathy and vestibular areflexia syndrome and may also contribute to isolated sensory neuropathy. The clinical significance of both heterozygous and homozygous (biallelic) RFC1 expansions in more diverse patient popul…
Peripheral pain threshold, glycaemic status, and LAMP3 genetic variation: A community-based analysis.
Diabetic polyneuropathy is a common complication of diabetes, yet substantial inter-individual variation in peripheral pain perception suggests underlying genetic influences. This population-based study investigated clinical, metabolic, and genetic determinants of pain threshold using intraepidermal…
Distinct sensory and autonomic involvement in hypermobile Ehlers-Danlos syndrome compared with idiopathic small fiber neuropathy: a multimodal study.
Hypermobile Ehlers-Danlos syndrome (hEDS), frequently presents with pain and autonomic symptoms suggestive of small fiber neuropathy (SFN). However, systematic comparisons between hEDS and idiopathic SFN (iSFN) using combined clinical, functional, and morphological approaches are lacking. We prospec…
Autoantibodies in small fiber neuropathy: frequency and clinical features associated with antibodies to the novel targets MX1 and DBNL.
Small fiber neuropathy (SFN) is characterized by neuropathic pain and autonomic dysfunction. Emerging evidence suggests a potential autoimmune component, although a limited number of autoantibody targets have been implicated so far. This study aimed to investigate the prevalence of antibodies agains…