Dermatomyositis
Dermatomyositis is an inherited inflammatory disease affecting the skin and muscles, seen almost exclusively in Collies and Shetland Sheepdogs.
Detailed Description
The disease causes skin lesions (ulcers, crusts, alopecia) and muscle inflammation, especially on the face, ears, and limbs. Severity ranges from mild skin involvement to severe muscle atrophy and difficulty eating or moving.
Common Symptoms
- Skin lesions (ulcers, crusts, alopecia) on face, ears, tail tip, and limbs
- Muscle atrophy
- Difficulty eating, chewing, or swallowing (severe cases)
Management Options
- Topical therapy, vitamin E, omega-3 fatty acids (mild cases)
- Corticosteroids, immunosuppressive drugs (severe cases)
Frequently Asked Questions
Is dermatomyositis contagious?
No, it is inherited and not infectious.
Can my Collie outgrow dermatomyositis?
Mild cases may improve with age; severe cases may persist.
Is there a genetic test for dermatomyositis?
Not currently, but research is ongoing.
How is dermatomyositis treated?
With topical and systemic medications, depending on severity.
Can affected dogs be bred?
No, breeding is strongly discouraged.
Condition Details
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Typical Age of Onset
2–6 months (juvenile onset)
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Testing Available
No
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Diagnosing Methods
Skin and muscle biopsy; Clinical history and breed predisposition
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Preventative Measures
Avoid breeding affected dogs
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Related Conditions
Demodicosis, Lupus, Other autoimmune skin diseases