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Symptom duration and clinical features in painful sensory neuropathy with and without nerve conduction abnormalities.
J Neurol Sci. 2003 Oct 15; 214(1-2):3-6.JN

Abstract

BACKGROUND

The term "small fiber sensory neuropathy" (SFSN) refers to an axonal sensory polyneuropathy predominantly affecting cutaneous sensory modalities, often associated with pain and with no evidence of large fiber involvement. We hypothesized that, in most patients, SFSN is the earliest manifestation of a nonspecific axonal neuropathy and will usually progress to involve larger, heavily myelinated sensory and motor fibers. We sought indirect evidence of this through an analysis of the correlation between symptom duration and large fiber involvement in patients with painful sensory neuropathy (PSN).

METHODS

A clinical diagnosis of PSN was supported by nerve conduction studies or measurement of epidermal nerve fiber (ENF) density in 43 patients. Symptom duration was correlated with the frequency of large fiber loss as measured by nerve conduction abnormalities. The severity and extent of clinical signs and symptoms were also evaluated in subjects with and without electrodiagnostic abnormalities.

RESULTS

Patients with large sensory axon involvement had symptoms of longer duration than patients with SFSN. The frequency of electrodiagnostic abnormalities increased in direct proportion to disease duration. Patients with electrodiagnostic abnormalities also had more extensive pinprick sensory deficits, suggesting that small fiber loss was more advanced in this group as well.

CONCLUSIONS

In PSN, the incidence of large fiber involvement appears to increase in proportion to symptom duration. This represents indirect evidence that SFSN usually progresses to involve both large and small fibers within 2-10 years.

Authors+Show Affiliations

Department of Neurology, University of Minnesota, 420 Delaware Street SE, MMC 295, Minneapolis, MN 55455, USA. walkx001@umn.eduNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

12972380

Citation

Walk, David, et al. "Symptom Duration and Clinical Features in Painful Sensory Neuropathy With and Without Nerve Conduction Abnormalities." Journal of the Neurological Sciences, vol. 214, no. 1-2, 2003, pp. 3-6.
Walk D, Zaretskaya M, Parry GJ. Symptom duration and clinical features in painful sensory neuropathy with and without nerve conduction abnormalities. J Neurol Sci. 2003;214(1-2):3-6.
Walk, D., Zaretskaya, M., & Parry, G. J. (2003). Symptom duration and clinical features in painful sensory neuropathy with and without nerve conduction abnormalities. Journal of the Neurological Sciences, 214(1-2), 3-6.
Walk D, Zaretskaya M, Parry GJ. Symptom Duration and Clinical Features in Painful Sensory Neuropathy With and Without Nerve Conduction Abnormalities. J Neurol Sci. 2003 Oct 15;214(1-2):3-6. PubMed PMID: 12972380.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Symptom duration and clinical features in painful sensory neuropathy with and without nerve conduction abnormalities. AU - Walk,David, AU - Zaretskaya,Marina, AU - Parry,Gareth J, PY - 2003/9/16/pubmed PY - 2003/12/17/medline PY - 2003/9/16/entrez SP - 3 EP - 6 JF - Journal of the neurological sciences JO - J Neurol Sci VL - 214 IS - 1-2 N2 - BACKGROUND: The term "small fiber sensory neuropathy" (SFSN) refers to an axonal sensory polyneuropathy predominantly affecting cutaneous sensory modalities, often associated with pain and with no evidence of large fiber involvement. We hypothesized that, in most patients, SFSN is the earliest manifestation of a nonspecific axonal neuropathy and will usually progress to involve larger, heavily myelinated sensory and motor fibers. We sought indirect evidence of this through an analysis of the correlation between symptom duration and large fiber involvement in patients with painful sensory neuropathy (PSN). METHODS: A clinical diagnosis of PSN was supported by nerve conduction studies or measurement of epidermal nerve fiber (ENF) density in 43 patients. Symptom duration was correlated with the frequency of large fiber loss as measured by nerve conduction abnormalities. The severity and extent of clinical signs and symptoms were also evaluated in subjects with and without electrodiagnostic abnormalities. RESULTS: Patients with large sensory axon involvement had symptoms of longer duration than patients with SFSN. The frequency of electrodiagnostic abnormalities increased in direct proportion to disease duration. Patients with electrodiagnostic abnormalities also had more extensive pinprick sensory deficits, suggesting that small fiber loss was more advanced in this group as well. CONCLUSIONS: In PSN, the incidence of large fiber involvement appears to increase in proportion to symptom duration. This represents indirect evidence that SFSN usually progresses to involve both large and small fibers within 2-10 years. SN - 0022-510X UR - https://www.unboundmedicine.com/medline/citation/12972380/Symptom_duration_and_clinical_features_in_painful_sensory_neuropathy_with_and_without_nerve_conduction_abnormalities_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0022510X03001758 DB - PRIME DP - Unbound Medicine ER -