626 DISEASES AND INJURIES OF THE FACIAL REGION. 



Mr. Yarnell then relates an instance of malignant growths in 

 the sinuses, but the evidence brought forward is very unsatis- 

 factory, the case to my mind being one of glanders, although its 

 true nature was rather obscui'e. 



In the chapter on Tumours the reader will find cystic growths 

 in the sinuses described, also the symptoms and treatment of 

 nasal polypi. 



The dog is occasionally subject to ulceration of the nasal cham- 

 bers, and to the formation of small growths upon the mucous 

 membrane. I cannot assign any causes; probably catarrhal 

 affections may be the originators. I have removed the growths, 

 and even a portion of the septum ad nasum, with good effect. 



In connection with the growth of the face and sinuses, de- 

 formities are apt to occur from no ostensible cause in the form 

 of rounded enlargements of the maxillary bones. The enlarge- 

 ments may be confined to one or they may affect both cheeks, 

 without discharge from the nostrils, and seemingly causing no 

 inconvenience to the horse. All treatment is calculated to do 

 harm; therefore, so long as they remain as mere deformities, 

 the practitioner ought not to interfere. Frictions wdth iodine 

 and blisters, the remedies generally employed, very often stimu- 

 late to activity what otherwise would remain latent. 



NASAL GLEET 



In the horse frequently depends upon no traceable cause, and 

 has been variously named dropsy of the sinuses (Varnell), 

 catai'rhus sinuum frontalis et maxillaris (Gamgee), and coryza. 

 In some cases there may be a lodgment of pus in and a discharge 

 from the sinuses, while in others the discharge is from the nasal 

 membrane only. The character of the secretion, and the whole 

 train of symptoms accompanying it, are very baffling. The horse 

 may be unthrifty, with or without cough, the coat harsh, skin 

 dry, appetite capricious or depraved, in some instances good, 

 but the assimilative powers seem to be at fault. The discharge 

 is intermittent, yellowish-white in colour, does not stick to the 

 nostrils, as in glanders, and there is no ulceration, as in that 

 disease ; sometimes containing a few shreds of coagulable matter, 

 which is symptomatic of disease of tooth or bone, as the coagula- 

 tion is caused by phosphoric acid or H„S, which are formed by the 

 decomposing matter. The Schneiderian membrane may be excor- 

 iated, presenting patches of abrasions resembling ulcers, but not 

 the characteristic pit-like depression of the glanderous ulcer. The 



