Dermatomyositis in dogs
This condition is one of inflammation (itis) of the skin (dermato) and muscle (myo) that is seen in young collies and Shetland sheepdogs. There appears to be a defect in the immune system that predisposes dogs to this disorder. The skin lesions typically develop first with variable muscle problems occurring later. There are many similarities to dermatomyositis in people. Ulcerative dermatosis may be a variant of this condition. It is a rare disorder that occurs in middle-aged to older dogs of the same breeds, and is manifest by skin lesions (blisters, crusting) that are seen primarily in the groin and underarm regions. Occasionally there are muscle abnormalities.
Definition
An inherited inflammatory condition of dogs that involves the skin and muscle and, occasionally, the blood vessels
Hospes
primarily in the collie, Shetland sheepdog. other breeds, including the Australian cattle dog, German shepherd, chow chow, Pembroke Welsh corgi.
Causes
•Hereditary
•Infectious agents
•Immune-mediated
Rik factors
•Trauma
•Sunlight
•Estrus
•Parturition
•Lactation
Clinical sign
1.Skin lesions-characterized by papules and vesicles (rare); variable degrees of erythema; alopecia, scaling, crusting, ulceration, and scarring on the face, around the lips and eyes, in the inner ear pinnae, on the tail tip, and over bony prominences on the distal extremities.
2.Footpad and oral ulcers rare
3.Myositis-vary from none to a bilateral symmetric decrease in the mass of the temporalis muscles to generalized symmetric muscle atrophy; lameness.
4.Aspiration pneumonia with megaesophagus.
Diferential diagnosis
•Demodicosis
•Dermatophytosis
•Bacterial folliculitis
•Juvenile cellulitis
•Discoid lupus erythematosus
•Systemic lupus erythematosus
•Polymyositis
dermatomyositis diagnosis
-removes a small sample of your dog's skin for examination by a veterinary pathologist.
-Skin biopsy (affected skin and muscle),
-electromyography (EMG)
Treatment
Vitamin E and occasional use of corticosteroids for flare-ups.
Pentoxifylline may help by improving microvascular blood flow
( source vet-zone )
Definition
An inherited inflammatory condition of dogs that involves the skin and muscle and, occasionally, the blood vessels
Hospes
primarily in the collie, Shetland sheepdog. other breeds, including the Australian cattle dog, German shepherd, chow chow, Pembroke Welsh corgi.
Causes
•Hereditary
•Infectious agents
•Immune-mediated
Rik factors
•Trauma
•Sunlight
•Estrus
•Parturition
•Lactation
Clinical sign
1.Skin lesions-characterized by papules and vesicles (rare); variable degrees of erythema; alopecia, scaling, crusting, ulceration, and scarring on the face, around the lips and eyes, in the inner ear pinnae, on the tail tip, and over bony prominences on the distal extremities.
2.Footpad and oral ulcers rare
3.Myositis-vary from none to a bilateral symmetric decrease in the mass of the temporalis muscles to generalized symmetric muscle atrophy; lameness.
4.Aspiration pneumonia with megaesophagus.
Diferential diagnosis
•Demodicosis
•Dermatophytosis
•Bacterial folliculitis
•Juvenile cellulitis
•Discoid lupus erythematosus
•Systemic lupus erythematosus
•Polymyositis
dermatomyositis diagnosis
-removes a small sample of your dog's skin for examination by a veterinary pathologist.
-Skin biopsy (affected skin and muscle),
-electromyography (EMG)
Treatment
Vitamin E and occasional use of corticosteroids for flare-ups.
Pentoxifylline may help by improving microvascular blood flow
( source vet-zone )
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