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| − | ==Chemical damage==
| + | #REDIRECT[[:Category:Integumentary System - Environmental Pathology]] |
| − | ===[[Contact Dermatitis]]===
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| − | ===[[Ergot Poisoning]]===
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| − | ===[[Fescue Poisoning]]===
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| − | ===[[Selenium Poisoning]]===
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| − | ==Physical damage==
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| − | ===[[Acral Lick Dermatitis]]===
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| − | ===[[Callus]]===
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| − | ===[[Feline Psychogenic Alopecia]]===
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| − | ===[[Injection Site Reaction]]===
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| − | ===[[Intertrigo]]===
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| − | ===[[Pyotraumatic Dermatitis]]===
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| − | ===[[Radiation Damage]]===
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| − | ===[[Low Temperature Damage]]===
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| − | ===[[High Temperature Damage]]==
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| − | ==Sunlight damage==
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| − | *Transient erythema may develop into sunburn erythema (warmth, swelling, pain)
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| − | *Diffusion of inflammatory mediators (''e.g.'' cytokines) from damaged keratinocytes and endothelial cells
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| − | *Photooxidation of existing melanin -> pigment darkening
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| − | *Melanogenesis
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| − | *Immune responses of skin are reduced by UV light
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| − | [[Category:Integumentary System - Sunlight Damage]] | |
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| − | ===[[Solar Dermatosis and Neoplasia]]===
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| − | ===[[Solar Dermatitis]]===
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| − | ===[[Photosensitisation]]===
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| − | ===Photoenhanced dermatoses===
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| − | *Many [[Skin Immunologic - Pathology|immune-mediated]] cutaneous disease are made worse by sunlight
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| − | **Lupus erythematosus
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| − | **Dermatomyositis
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| − | **Pemphigus erythematosus
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| − | *Vasculitis in extremities, especially white-haired horses
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| − | *Grossly:
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| − | **Erythematous, well circumscribed crusted lesions or hyperkeratotic [[Skin Glossary - Pathology|plaques]]
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| − | *Microscopically:
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| − | **Vasculitis of superficial dermal vessels
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| − | **Thrombi may be seen
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| − | [[Category:Integumentary System - Sunlight Damage]]
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