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Special:MobileDiff/64629
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Skin Environmental - Pathology
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Revision as of 22:21, 6 June 2010
871 bytes removed
,
22:21, 6 June 2010
→Photosensitisation
Line 178:
Line 178:
**Dogs may develop actinic [[Skin Glossary - Pathology|comedones]]
**Dogs may develop actinic [[Skin Glossary - Pathology|comedones]]
−
===
Photosensitisation===
+
===[[Photosensitisation]]
===
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*'''Primary'''
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**Ingestion of photodynamic substance from plants (''Hypericum perforatum'' and ''Fagopyrum sagittatum'' - buckwheat) or fungal contaminants
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**Induced by drug administration - phenothiazines, tetracyclines, thiazides, sulphonamides
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*'''Abnormal porphyrin metabolism'''
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**Bovine congenital porphyria
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**Bovine erythropoeitic protoporphyria
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*
[[Photosensitisation
|'''Hepatogenous'''
]]
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**Impaired excretion of phylloerythrin (chlorophyl metabolism product) due to hepatic disease
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**[[Liver Biliary Tract - Pathology#Obstruction|Biliary obstruction]]
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**Inherited defects
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**Hepatic injury due to toxic plants or fungal contaminants, chemicals or some infectious agents
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*Grossly:
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**In areas lacking hair or pigment
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**Erythema, oedema -> blisters, exudation, necrosis, sloughing or keratitis
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*Microscopically:
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**Subepidermal vesicles
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**Ulceration
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**Secondary infection
===Photoenhanced dermatoses===
===Photoenhanced dermatoses===
Bara
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