320 CLINICAL VETERINARY MEDICINE AND SURGERY. 



previously fond of the water and a very good swimmer, it now avoided 

 entering or soon returned, breathing with difficulty and through the 

 mouth. 



The face gradually became deformed, the anterior wail of the nasal 

 cavities projected, especially on the left side, the skin became ulce- 

 rated over the swelling, and the tumour finally appeared externally. 



When the dog was brought here a blood-stained discharge ran from 

 both nostrils. The nasal cavities were obstructed. Over the middle 

 of the nose was a projecting, reddish, bleeding tumour, which had 

 perforated the bones and was surrounded by a swollen depilated 

 zone. 



Autopsy. — Both nasal cavities were entirely filled by the tumour, 

 which was adherent over a large surface to the mucous membrane 

 covering the floor of these cavities, whence it appeared to have 

 originated. It had destroyed the nasal septum and the turbinated 

 bones. Below it had advanced close to the nostrils ; posteriorly it 

 appeared bilobed, the lower portion being attached to the side of the 

 palate, the upper portion extending towards the entrance to the 

 sinuses, which were filled with ill-smelling pus. 



The tumour was greyish, and in places somewhat reddish in colour. 



Fig. 28. — Sarcoma of the nose. 



Its tissue was very soft and friable, and contained large numbers of 

 vessels. 



In the posterior lobe of the left lung was a tumour the size of a 

 hazel-nut, projecting slightly above the surface. Its tissue was friable 

 and reddish, resembling that of the new growth in the nose. 



On microscopical examination this tumour appeared almost entirely 

 formed of round-cells and of vessels ; the cells were of small size and 

 contained a strongly-marked nucleus, but little protoplasm ; in places 

 a fine reticulated stroma could be distinguished. Most of the sections 

 showed throughout their extent the histological characters of encepha- 

 loid sarcoma. 



