Abstract
Objectives
To compare a simpler method for counting intraepidermal nerve fibres with a standard computer based image analysis method in normal subjects with skin taken from the hypothenar region.
Methods
In 40 healthy controls (mean age 41.1 years, range 21–71, 24 Chinese, 11 Indian, 5 Malay, 30 females) intraepidermal nerve fibres per length of epidermis were determined using immunoperoxidase staining with the panaxonal antibody PGP 9.5. Under brightfield microscopy, two methods of determining the length of the epidermis were compared. A simpler method employing a microscope intraocular lens ruler was compared with the more complex gold standard using image software analysis .
Results
Intraepidermal nerve fibres per length of epidermis using the intraocular ruler method were 3.07 nerve fibres/mm (2SD 1.56). The image software analysis obtained values of 3.05 nerve fibres/mm (2SD 1.54). Correlation between the two tests was excellent (r=0.999 p=<0.00001). Epidermal nerve fibre counts from hypothenar skin are lower than in more proximal sites.
Conclusion
A simple method for counting intraepidermal nerve fibres produces results similar to those using standard software image analysis. This should help the implementation of this technique for wider use.
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Abbreviations
- CI::
-
Confidence Interval
- DAB::
-
Diaminobenzidine
- IENFD::
-
Intraepidermal nerve fibre density
- MRC::
-
Medical Research Council
- PGP 9.5::
-
Protein Gene Product 9.5
- SD::
-
Standard Deviation
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Acknowledgements
This research was in part financed by the National Medical Research Council of Singapore (grant no. 0466/2000).
Part of this material has been presented at the American Association of Electrodiagnostic Medicine, September 16–20, 2003 San Francisco, CA, USA.
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Received in revised form: 22 December 2005
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Wilder-Smith, E.P., Chow, A. Comparison of a simple method for quantitation of intraepidermal nerve fibres with a standard image analysis method using hypothenar skin. J Neurol 253, 1011–1015 (2006). https://doi.org/10.1007/s00415-006-0147-6
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DOI: https://doi.org/10.1007/s00415-006-0147-6