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==Bones==
*Benign neoplasm of bone
*Uncommon
*In horses and cattle
*Sites
**Flat bones (skull, scapula)
**Mainly affect jaws and sinuses
*Grossly:
**Smooth bordered, slow-growing tumours
*Histologically:
**Covered with thin layer of bone
**Consist of [[Bones - normal#Bone organisation|cancellous bone]]
**Differentiated [[Bones - normal#Normal structure|osteoblasts and osteoclasts]]
*Cause disfigurement, may obstruct nasal passages
*Recur if not completely removed
==Paranasal Sinuses==
==Paranasal Sinuses==
===In Horses===
===In Horses===