32 2 CLINICAL VETERINARY MEDICINE AND SURGERY. 



entire nasal region, towards the centre of which a second sinus opened, 

 and suppuration became abundant. 



On examining the patient symptoms were seen analogous to those 

 noted in the preceding case, except that deformity of the hard palate 

 and nasal lesions were more marked on the left than on the right side. 



Autopsy. — The left nasal cavity was completely obstructed by the 

 tumour, the posterior portion of which extended as far as the entrance to 

 the pharynx and into the sinuses. The nasal bone, upper portion of the 

 maxilla, and internal table of the frontal bone were at points thinned 

 and perforated. The nasal septum and ethmoid cells were partially 

 destroyed. In the left cavity the tumour had not advanced so far 

 posteriorly and upwardly. As in Case i6, the new growth appeared to 

 have started in the mucous membrane of the lower wall of the nasal 

 fossa. 



On section the tumour appeared whitish-grey and fairly vascular. 

 Microscopical examination showed it to consist of sarcomatous and 

 mucous tissue (myxo-sarcoma). 



23. Three-year-old setter, brought for examination on the 6th 

 August, 1894. 



A year before the animal had been attacked with sneezing fits, 

 which became more and more frequent. Greyish muco-pus, occasionally 

 streaked with blood, ran from the nose. Some months later the face 

 began to swell, and gradually became more deformed. Finally, the skin 

 ulcerated over the most prominent part of the swelling. For a fortnight 

 previous to entry blood-stained pus escaped in considerable quantities 

 by the wound at this point. 



When brought here the animal was very thin and appeared in severe 

 pain. The deformity of the face and the existence in this region of a 

 sinuous wound discharging greyish pus clearly pointed to the nature of 

 the affection. On the examiner attempting to touch the wound the 

 animal threatened to bite. The nasal cavities were completely obstructed, 

 and breathing was carried on through the mouth. 



Post-mortem Examination. — On being opened along the middle line 

 the nasal cavities were found entirely filled with the tumour. The 

 sinuses were invaded ; one portion of the septum, together with the 

 turbinated bones and ethmoid cells, had disappeared. In front the 

 tumour extended to the nostrils, behind to the pharynx. The sinuses 

 contained sticky, greyish, offensive pus. 



This tumour, like the two preceding, appears to have originated 

 from the pituitary membrane lining the floor of the nasal cavities. 

 The macroscopic and microscopic characters were similar to those of 

 the new growth in Case 17. 



Remarks. — The majority of tumours of the nasal cavities in the dog 

 are myxomatous polypi, which tend to undergo conversion into sarco- 

 mata. When recent they can be removed through an incision in the 

 nasal bone and a permanent cure effected, but, as a general rule, disease 

 has made such progress before the patients are submitted to examina- 

 tion that intervention is entirely useless. 



