CANCROID OF THE UPS. EPITHELIOMA. 



Epithelioma : Animals susceptible ; accessory causes ; symptoms ; lesions. 

 Treatment : Warts and polypi. Actinomycosis : Wounds ; abrasions ; in- 

 fection atria. Symptoms ; treatment. Trombidiosis : infected regions; 

 not compulsory parasite ; European and American trombidia ; distinct from 

 chigoe. Symptoms. Treatment. 



This has been observed in the cat and the horse, commencing 

 at the angle of the mouth and doubtless partially determined in 

 the latter animal by the irritation of the bit. 



It is characterized by thickening of the tissues of the lips, in 

 the form of small irregularly rounded masses, and tending to the 

 formation of a spreading ulcer. The thickened tissues are in- 

 vaded, pushed aside and infiltrated by epithelial or epithelioid 

 cells, which, no longer confined to the surface as in the natural 

 state, grow in the interior of the tissues and destroy them. 



Treatment. The disease has little tendency to cause second- 

 ary deposits in other organs and may often be arrested by local 

 measures. In its earliest stages it may be arrested by the thor- 

 ough removal of the diseased structures with the knife, the re- 

 sulting deformity being obviated by bringing the raw edges to- 

 gether by suture, so as to secure their adhesion, or the actual 

 cautery may be used. The tendency to irritation from putrefac- 

 tion products escaping from the mouth may be counteracted by 

 occasional sponging with a weak lotion of carbolic acid ( i part 

 to 50 of water) or an ointment of one part of very finely pow- 

 dered boracic acid to two parts of simple ointment. 



Leblanc has repeatedly succeeded in these cases by the use of 

 chlorate of potash, locally and generally. The local application 

 may be a solution of two drachms in four ounces of water, while 

 the dose of the powder for the horse is 2 to 4 drachms daily. 



Warts and Polypi. These are common on the outer and 

 even the inner side of the lips, especially in dogs. They are 

 easily removed by the scissors, after which their roots should be 

 thoroughly cauterized with a pointed stick of lunar caustic or 

 chloride of zinc. 



