

Author: Jones BR Johnstone AC
Publisher: Taylor & Francis Ltd
ISSN: 1176-0710
Source: New Zealand Veterinary Journal, Vol.30, Iss.8, 1982-08, pp. : 119-121
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Abstract
A nine-month-old Cavalier King Charles Spaniel was examined because it could not withdraw its tongue into its mouth and had difficulty eating and drinking. These clinical signs were first observed when the dog was two months of age. On percussion of the tongue a dimple could be produced and there was electromyographic evidence of myotonia. Histological examination showed replacement of muscle fibres by adipose tissue, focal areas of myonecrosis, neutrophil infiltration and proliferation of sub-sarcolemmal nuclei. These changes were considered to be consistent with a primary myopathy similar to paramyotonia in man. No related dogs were found to be affected.
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