26 CLINICAL VETERINARY MEDICINE AND SURGERY. 



as large as an egg, and adherent to the deeper-seated tissues. The 

 right was the size of a pigeon's egg, showed the same irregularity, 

 and was very hard. The diagnosis of epithelioma of the maxilla was 

 therefore fairly clear. The animal was incurable. Being asked to 

 leave it for a time, the owner preferred to remove and re-sell it, so 

 that I did not again see this patient. 



The following is a similar case dating from i8gr. A twelve-year- 

 old horse was brought to the clinique with this history : About three 

 months before, its forehead was seen to be swollen ; the swelling 

 increased gradually, mastication became painful, and an offensive 

 discharge occurred from the right nostril. 



The right side of the face showed a diffuse, firm, slightly painful 

 swelling, not extending beyond the anterior extremity of the zygo- 

 matic ridge of the superior maxillary bone. The submaxillary 

 gland of the same side formed a hard bosselated mass, moveable in 

 relation to the skin, but very adherent to the deep parts. From the 

 right nostril a greyish ill-smelling discharge occurred. By separating 

 the wings of the nostril, a greyish tumour could be seen filling the 

 nasal cavity and extending forwards between the turbinated bones. 

 On examining the cavity of the mouth, the portion of the hard palate 

 extending along the line of upper molars was seen to be occupied by 

 a reddish, exuberant, granulating swelling, which towards the middle 

 of the mouth almost covered half the space between the rows of teeth. 

 The cheek was partially filled by vegetations, and by food material 

 in a putrefying condition. Several of the molars were very loose, and 

 their alveoli had certainh' been destroyed. 



Though swelling of the forehead was relatively little pronounced, 

 you saw that the changes were extensive. The diagnosis, incurable 

 tumour of the maxilla, was patent to all. Microscopic examination of 

 a fragment of new tissue removed from the hard palate opposite the 

 second molar confirmed this diagnosis. The growth was a lobulated 

 epithelioma of the pavement-epithelium type. Soon afterwards the 

 animal was slaughtered. I was able to obtain the head, and trace the 

 extent of the lesions. The tumour had destroyed almost the whole of 

 the upper maxilla, the anterior portion of the palatine bone, and part 

 of the turbinated bones. It filled the middle third, and part of the 

 upper third of the right nasal cavity, as well as both maxillary 

 sinuses. The third and fourth molars were completely detached, the 

 second, fifth, and sixth hardly retained their positions. The affection 

 was well marked in the submaxillary lymphatic glands, which pre- 

 sented the same characters as the tumour. 



