Changes

*Hereditary in Collies and Shetland sheepdgs

*Hereditary in Collies and Shetland sheepdgs

*Lesions resemble [[Muscles Inflammatory - Pathology#Canine polymyositis|canine polymyositis]]

*Lesions resemble [[Muscles Inflammatory - Pathology#Canine polymyositis|canine polymyositis]]

*Also degeneration of blood vessels -> muscle [[Muscles Degenerative - Pathology#Ischaemia|microinfarcts]]

*Also degeneration of blood vessels -> muscle [[Muscle Ischaemia|microinfarcts]]

*Usually generalised but temporalis and other masticatory muscles may be involved the most

*Usually generalised but temporalis and other masticatory muscles may be involved the most

*Microscopically: inclusion bodies in endothelial cells

*Microscopically: inclusion bodies in endothelial cells