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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]])
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| [[Category:Nasal_Cavity_-_Pathology]] | | [[Category:Nasal_Cavity_-_Pathology]] |