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*Microscopically: acanthosis, spongiosis, erosions or ulceration, predominantly eosinophilic dermatitis, possibly areas of collagen degeneration
 
*Microscopically: acanthosis, spongiosis, erosions or ulceration, predominantly eosinophilic dermatitis, possibly areas of collagen degeneration
 
===Eosinophilic granulomas===
 
===Eosinophilic granulomas===
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*Involves cats, dogs, horses
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*Collagen degeneration in lesions os eosinophil degranulation
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*Often involved in reaction to parasites, foreigh bodies or mas cell tumours
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*Grossly:
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**Papules, nodules, plaques, ulcers in skin
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**Nodules or ulcers in oral mucosa of cats and dogs or on foot pads of cats
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*Microscopically:
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**Nodular dermatitis or stomatitis
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**Fragments of degenerated collagen surrounded by eosinophils and macrophages
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===Eosinophilic folliculitis and furunculosis===
 
===Eosinophilic folliculitis and furunculosis===
  
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