Hyperplasia of the Skin. 523 



in the particular animal system, or that both these factors con- 

 tribute to the result. Debilit}-, and traumas contribute to bring 

 about the infection. 



Symtoms. A nodular, hot, and very painful swelling, impli- 

 cating the substance of the true skin, and surrounded by a hot, 

 swollen zone, progresses to suppuration in the centre, yet when 

 it bursts, or is opened, a core or .small mass of necrotic, tough, 

 fibrous tissue is found to be firmly adherent in the center of the 

 bottom of the sore. 



Prevention. Must be sought in sustaining the general health 

 and in preserving the greatest cleanliness of stables and skin. 

 Washing with a weak antiseptic solution when returning from 

 muddy streets may be of use. 



Treatment. When developing, the application of carbolic acid 

 in cry.stal or on the end of a glass rod may often relieve the pain 

 and destroy the microbes. Next day the part may be painted 

 with tincture of iodine. If already' opened the phenol may still 

 be applied and followed after five minutes by alcohol to check 

 the caustic action. Or boric or salicylic acid may be applied. 

 To counteract the constitutonal tendency, iron, bitters and other 

 tonics and antiseptics, calcium sulphide, sulphur and sodium 

 sulphite may be given. 



HYPERPLASIA OF THE SKIN. 



Productive inflammations and tumors of the skin are common 

 in domestic animals but as they are essentially surgical lesions, 

 they will be better considered under that head. We may name 

 papiloma, warts, fibroma, melanoma, epithelioma, sarcoma, 

 adenoma, carcinoma, dermoid cysts. Parasitic and microbian 

 diseases of the skin will be found under their respective headings. 



