Changes

==Clinical signs and locations of sinonasal pathology==

==Clinical signs and locations of sinonasal pathology==

*Nasal discharge

===Nasal discharge===

**Bilateral discharge:

**Bilateral discharge:

***Lesion is caudal to nasal septum eg: pharyngeal lesion; LRT lesion in horses  

***Lesion is caudal to nasal septum eg: pharyngeal lesion; LRT lesion in horses  

**Unilateral discharge:

**Unilateral discharge:

***Lesion is cranial to nasal septum eg: nasal or sinus lesion; pharyngeal or guttaral pouch lesion in horses

***Lesion is cranial to nasal septum eg: nasal or sinus lesion; pharyngeal or guttaral pouch lesion in horses

*Type of discharge

===Type of discharge===

**Serous

**Serous

**Catarrhal

**Catarrhal

**Purrulent

**Purrulent

**Haemorrhage

**Haemorrhage

*Clinical signs

===Clinical signs===

**Sneezing - nasal

**Sneezing - nasal

**Facial swelling - nasal, pharyngeal

**Facial swelling - nasal, pharyngeal