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| | ===Pathology=== | | ===Pathology=== |
| − | Grossly: | + | Grossly, papular dermatitis is seen in combination with any of crusting, erythema, alopecia, excoriations, hyperpigmentation or lichenification. Microscopically, flea allergic dermatitis presents as a hyperplastic superficial perivascular dermatitis. Oedema may be seen, together with an influx of mast cells, eosinophils, lymphocytes and histiocytes. |
| − | **Papular dermatitis
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| − | **Secondary excoriations
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| − | **Alopecic nodule if chronic
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| − | *Microscopically:
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| − | **Hyperplastic superficial perivascular dermatitis
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| − | **Oedema, [[Mast Cells|mast cells]], [[Basophils|basophils]], [[Eosinophils|eosinophils]], [[Lymphocytes|lymphocytes]], histiocytes
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| − | **Fibropruritic nodules covered by hyperplastic epidermis
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| − | | |
| − | | |
| − | *Microscopically:
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| − | **Hyperplastic superficial
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| − | perivascular dermatitis | |
| − | **Oedema, [[Mast Cells|mast cells]],
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| − | [[Basophils|basophils]], [[Eosinophils|eosinophils]],
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| − | [[Lymphocytes|lymphocytes]], histiocytes
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| − | **Fibropruritic nodules
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| − | covered by hyperplastic epidermis
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| | ==Treatment== | | ==Treatment== |