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~~==In Horses==~~

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~~===[[Nasal Septum Thickening]]===~~

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~~===Nasal amyloidosis===~~

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*Deposition of amyloid in nasal submucosa of horses

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*Not part of generalised amyloidosis

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*May extend to [[Larynx - Anatomy & Physiology|larynx]]

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*Nodular of diffuse

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*Stenosis may cause obstruction

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*Smooth surface, waxy sheen on cut surface

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*Macrophages and lymphocytes, giant cells

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*May have overlying ulceration of mucosa

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*Large firm nodules in alar folds, rostral nasal septum and floor of nasal cavity

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*Micro:

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**Deposition of hyaline material in nasal mucosa

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~~==Circulatory disturbances==~~

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~~===Congestion and Hyperaemia===~~

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*Congestion - passive interference with venous return

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**Non-specific

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**Commonly found at post-mortem

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*Hyperaemia - active vasodilation

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**Associated with early stages of inflammation

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~~===Haemorrhage===~~

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*Can result from local trauma or just transfer blood from lower down in the respiratory tract (see [[Respiratory System Clinical Signs - Pathology#Epistaxis|epistaxis]])

[[Category:Nasal_Cavity_-_Pathology]]

Bara

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Category:Nasal Cavity - Degenerative Pathology (view source)

Revision as of 18:48, 15 February 2011