Einar P V Wilder-Smith1, Adeline Chow. 1. Department of Medicine Division of Neurology, Yong Loo Lin School of Medicine, 5 Lower Kent Ridge Road, 119074 Singapore, Singapore. mdcwse@nus.edu.sg
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= or <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.
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= or <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.
Authors: B G McCarthy; S T Hsieh; A Stocks; P Hauer; C Macko; D R Cornblath; J W Griffin; J C McArthur Journal: Neurology Date: 1995-10 Impact factor: 9.910
Authors: Amanda C Y Chan; Hiu Yi Wong; Yao Feng Chong; Poh San Lai; Hock Luen Teoh; Alison Y Y Ng; Jennifer H M Hung; Yee Cheun Chan; Kay W P Ng; Joy Vijayan; Jonathan J Y Ong; Bharatendu Chandra; Chi Hsien Tan; Nurul H Rutt; Ti Myen Tan; Nur Hafiza Ismail; Einar Wilder-Smith; Herbert Schwarz; Hyungwon Choi; Vijay K Sharma; Anselm Mak Journal: Ann Neurol Date: 2021-12-01 Impact factor: 11.274