CANCROID OF THE LIPS. EPITHELIOMA. 



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

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

 tion atria. Symptoms; treatment. Trombidiosis: infected regions; not com- 

 pulsory parasite; European and American trombidia; distinct from chigoe. 

 Symptoms. Treatment. 



This ha.s been ob.served in the cat and the horse, commencing 

 at the angle of tlie 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 tissties are in- 

 vaded, pushed aside and infiltrated by epithelial or epitlielioid 

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

 state, grow in the interior of the tissues and de.stro}' them. 



Treatment. The disease has little tendency to cause secondary 

 deposits in other organs and ma^- often be arrested by local 

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

 removal of the diseased structtires with the knife, the resulting 

 deformit}' being obviated by bringing the raw edges together by 

 suture, so as to secure their adhesion, or the acttial cautery may 

 be tised. The tendency to irritation from putrefaction products 

 escaping from the mouth may be counteracted b}' occasional 

 sponging with a weak lotion of carbolic acid { i part to 50 of 

 water) or an ointment of one part of very finel}^ powdered 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. Tliese 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. 



