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==Developmental Pathology==
 
==Developmental Pathology==
===Erythropoietic Porphyria.===  
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===[[Erythropoietic Porphyra]].===  
*"Congenital Pink [[Oral Cavity - Teeth & Gingiva - Anatomy & Physiology|Tooth]]" 
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*Occurs in cattle, cats and sometimes pigs
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*[[Oral Cavity - Teeth & Gingiva - Anatomy & Physiology|Teeth]] are pink due to congenital inability to metabolise haemoglobin pigments. These pigments also produce [[photosensitivity]] in skin.
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*This results in severe sunburn if animal exposed to normal levels of sunlight.
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Discoloration of a single [[Oral Cavity - Teeth & Gingiva - Anatomy & Physiology|tooth]] is more likely to be caused by pus in the [[Oral Cavity - Teeth & Gingiva - Anatomy & Physiology|tooth]].
      
===Photosensitising agents===
 
===Photosensitising agents===
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