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==Paranasal Sinuses==
===In Horses===
*Haemartoma arising from periosteum of the skull or facial bones
*See [[Bones Hyperplastic and Neoplastic - Pathology#Osteoma|Bones and Cartilage - hyperplastic and neoplastic]]
*Benign
*Clinical signs:
**Mucopurulent discharge
**Facial distortion
**Epiphora
**Obstructed air flow
[[Category:Paranasal Sinuses - Pathology]]
[[Category:Neoplasia]]