VE TERINAR T DENTAL S URGER T 103 



it firmly adheres. This form sometimes attains 

 sufficient size to bulge out the walls of the sinus, 

 giving it a rounded appearance, and in some instances 

 breaking through the bone. 



A case of this kind was brought to my notice 

 where great bulging of the facial bones had taken 

 place over the inferior maxillary sinus. When first 

 seen, an opening had formed externally, which 

 established communication with the tumor. The 

 owner of the animal merely wanted an opinion at 

 the time, wishing to have the operation, if one was 

 necessary, deferred. He called again later and 

 requested me to operate which I did. By this time 

 a portion of the skin had sloughed away, exposing 

 the exostosis to full view. A circular portion of 

 bone was removed from over the exostosis, which 

 was then removed by aid of the bone forceps. The 

 cavity was dressed with antiseptic lotions, complete 

 recovery taking place in a short time. 



The second variety consists of bone and cartilage, 

 with more or less fungoid matter distributed through- 

 out its formation. It is the variety most often met 

 with, frequently giving rise to a fetid discharge 

 from the nostril on the side where it is situated. 



The third variety is that composed of cartilage. 

 This undoubtedly is the earliest stage of the two 

 preceding varieties and by ossification, if left alone, is 

 developed into bone, forming the true osseous tumor. 



