TUMORS 99 



Osseous Tumor— Osteoma. 



What is an osteoma 9 



An innocent new-growtli composed either of compact or 

 cancellous bone. 



Sow do they occu/r ? 



Solitary or multiple, witli wide basis or pedunculated, 

 either as pure or mixed tumors. 



Describe an osteoma. 



It grows slowly, is bard or densely bard, painless, more 

 or less circumscribed, connected witb a bone or cartilage. 

 According to tbeir consistency, tbey are known as ivory oste- 

 oma (osteoma eburneum); when capped witb cartilage, as 

 exostosis cartUaginea ; when overlaid by a bilrsa, exostosis 

 bursata. 



What do you understand by an exostosis ? 



A bony new-growtb, tbe result of an inflammation. 

 Name the seats of predilection. 



In tbe borse, about tbe lower third of the lower maxilla 

 and internal face of the metacarpus, in the cavities of the 

 head of the horse and ox, and in the mammary gland of the 

 bitch. 

 What is a dental osteoma or odontoma ? 



It is a bony new-growth originating in the developing 

 tooth or alveolar periosteum. 



Muscular Tumor— Myoma. 



What is a myoma ? 



An innocent tumor composed of muscle fibres. 



