588 



CLINICAL VETERINARY MEDICINE AND SURGERY. 



Cancer may attack any of the glands of the digestive tract. In the 

 dog we have seen epithehoma of the parotid (Fig. 91) remarkable fpr 

 the presence of epidermal nests. This appearance, also seen in man, 



Fig. 91. — Epithelioma of the parotid (dog). 



is explained by the embryological origin of the parotid, which forms a 

 simple outgrowth of the buccal mucous membrane. 



One of the most curious of all the epithelial tumours was seen in an 



Fig. 92. — Pavement epithelioma of the stomach (mare). 



eleven-year-old mare which, though previously in good health, rapidly- 

 succumbed to an accidental infection. On post-mortem examination 



